NEET Biology Multiple Choice Questions – Biomolecules

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Biomolecules Multiple Choice Questions

Question 1. Both in cells and extracellular fluids, dibasic phosphate (HPO2-4) and monobasic phosphate (H2PO–4) act as acid-base buffers to maintain

  1. K+ concentration of extracellular fluid
  2. Na+ concentration of extracellular fluid
  3. Na+ concentration of cellular fluid
  4. H+ concentration of cellular fluid

Answer: 4. H+ concentration of cellular fluid

Question 2. All the following statements are correct except

  1. Mitochondria are rich in manganese.
  2. Molybdenum is necessary for the fixation of nitrogen catalyzed by the enzyme nitrogenase.
  3. Magnesium is essential for a large number of enzymes, particularly those utilizing ATP.
  4. Calcium and magnesium have no effect on the excitability of nerves and muscles.

Answer: 4. Calcium and magnesium have no effect on the excitability of nerves and muscles.

Question 3. The most abundant element in cell living matter is

  1. C
  2. H
  3. O
  4. N

Answer: 3. O

Question 4. Which element is/are found in cytochromes?

  1. Fe++ and Cu++
  2. Fe+++ and Mg++
  3. Mg++
  4. Cu++

Answer: 1. Fe++ and Cu++

Question 5. The concentration of Na, K, Ca in a cell in decreasing order is

  1. K-Na-Ca
  2. K-Ca-Na
  3. Na-K-Ca
  4. Ca-K-Na

Answer: 1. K-Na-Ca

Question 6. All the macromolecules are the result of the process of polymerization, a process in which repeating subunits termed monomers are bound into chains of different lengths except

  1. Nucleic acids
  2. Carbohydrates
  3. Lipids
  4. Proteins

Answer: 3. Lipids

Question 7. Raffinose has three monosaccharide units. Those are

  1. Glucose, pentose, and maltose
  2. Glucose, levulose, and galactose
  3. Glucose, fructose, and sucrose
  4. Fructose, fructose, and galactose

Answer: 2. Glucose, levulose, and galactose

Question 8. A monosaccharide is a simple polyhydroxy aldehyde or ketone molecule, which cannot be further hydrolyzed into smaller units. The number of carbon atoms in mono-saccharides vary from

  1. 2-8 carbons
  2. 2-7 carbons
  3. 3-6 carbons
  4. 3-7 carbons

Answer: 4. 3-7 carbons

Question 9. The sweetest among all naturally occurring sugars is

  1. Glucose
  2. Fructose
  3. Mannose
  4. Galactose

Answer: 2. Fructose

Question 10. Glucose is

  1. Aldose hexose sugar
  2. Ketose hexose sugar
  3. Pyranose pentose sugar
  4. Furanose pentose sugar

Answer: 1. Aldose hexose sugar

Question 11. Glucose is also called

  1. Dextrose
  2. Com sugar
  3. Grape sugar
  4. All of these

Answer: 4. All of these

Question 12. Why sucrose and not glucose is used to preserve fruit products?

  1. Glucose is reactive as it has a CHO group.
  2. Sucrose is more common in nature.
  3. Sucrose is easily available and has both glucose and fructose.
  4. None of these

Answer: 1. Glucose is reactive as it has a CHO group.

Question 13. Honey has two sugars. They are

  1. Glucose and mannose
  2. Glucose and galactose
  3. Dextrose and levulose
  4. Dextrose and lactose

Answer: 3. Dextrose and levulose

Question 14. Which of the following is not a reducing sugar?

  1. Glucose
  2. Lactose
  3. Maltose
  4. Sucrose

Answer: 4. Sucrose

Question 15. Which of the following will yield only glucose on hydrolysis?

  1. Sucrose
  2. Lactose
  3. Maltose
  4. Raffinose

Answer: 3. Maltose

Question 16. Storing carbohydrates in the form of polysaccharides has the following advantages:

  1. During their formation, many molecules of water are removed from monosaccharides (dehydration synthesis), condensing the bulk to be stored.
  2. When necessary, polysaccharides are broken down by enzymes for the release of energy.
  3. Unlike small carbohydrates, polysaccharides are relatively easy to store.
  4. All of these

Answer: 4. All of these

Question 17. The most abundant organic compound in the biosphere is

  1. Lignin
  2. Cellulose
  3. Pectin
  4. Hemi-cellulose

Answer: 2. Cellulose

Question 18. The largest amount (90%) of cellulose amongst the natural materials is present in

  1. Wood
  2. Cotton fibers
  3. Rayon
  4. Roughage

Answer: 2. Cotton fibers

Question 19. Carbohydrates, the most abundant biomolecules on earth, are produced by

  1. Some bacteria, algae, and green plant cells
  2. Fungi, algae, and green plant cells
  3. All bacteria, fungi, and algae
  4. Viruses, fungi, and algae

Answer: 1. Some bacteria, algae, and green plant cells

Question 20. Cellulose is

  1. Heptopolysaccharidc
  2. Heteropolysaccharide branched
  3. Hexosan polysaccharide, unbranched
  4. Pentosan polysaccharide, branched

Answer: 3. Hexosan polysaccharide, unbranched

Question 21. Which of the following is added to ice creams, cosmetics, and medicines to emulsify and give a smooth texture?

  1. Cellulose acetate
  2. Cellulose nitrate
  3. Carboxymethyl cellulose
  4. Cellulose

Answer: 3. Carboxymethyl cellulose

Question 22. Cliitin is the second most abundant organic substance present in the exoskeleton of insects and crustaceans. It is a

  1. Protein
  2. Polysaccharides and the basic unit is N-acetylglucosamine
  3. Protein and CaCO3 deposits in it
  4. Lipid

Answer: 2. Polysaccharide and the basic unit is N-acetylglucosamine

Question 23. One of the following is the correct sequence of carbohydrates in the order of increasing complexity of chemical structure.

  1. Sucrose, starch, oligosaccharide, maltose, triose
  2. Triose, maltose, sucrose, oligosaccharide, starch
  3. Triose, glucose, maltose, oligosaccharide, starch
  4. Oligosaccharide, triose, starch, sucrose, maltose

Answer: 3. Triose, glucose, maltose, oligosaccharide, starch

Question 24. Which one is a carbohydrate?

  1. Inulin
  2. Raphide
  3. Aleurone
  4. Cystolith

Answer: 1. Inulin

Question 25. The center of starch grain is called hilum. It is made up of

  1. Protein
  2. Carbohydrate
  3. Fat
  4. Nitrogen

Answer: 1. Protein

Question 26. Which one is a fibrous polysaccharide?

  1. Starch
  2. Glycogen
  3. Cellulose
  4. Mucilage

Answer: 3. Cellulose

Question 27. Glucose is stored as glycogen in

  1. Pancreas
  2. Bone
  3. Kidney
  4. Liver

Answer: 4. Liver

Question 28. Which of the following yields purgative?

  1. Hibiscus esculentus
  2. Plantago ovata
  3. Aloe barbadensis
  4. Both (2) and (3)

Answer: 4. Both (2) and (3)

Question 29. Choose the odd one out.

  1. Keratin phosphate
  2. Hyaluronic acid
  3. Chondroitin sulfate
  4. Alginic acid

Answer: 4. Alginic acid

Question 30. A cellulose molecule is formed by the polymerization of glucose. The number of glucose molecules present in cellulose is

  1. 600
  2. 6000
  3. 60,000
  4. 60

Answer: 2. 6000

Question 31. Mucilages are polysaccharides formed from galactose and mannose. They are slimy substances. Which one of the following is not a mucilage?

  1. Agar
  2. Alginic acid
  3. Rayon
  4. Carrageenin

Answer: 3. Rayon

Question 32. Starch grains of rice are

  1. Dumb-bell shaped
  2. Simple eccentric
  3. Simple concentric
  4. Compound

Answer: 4. Compound

Question 33. Cellulose forms a major portion of the food of grazing cattle. It is

  1. Digested by the gut bacteria
  2. Digested by the animal itself
  3. Digested partly by animals and partly by bacteria
  4. Passed out undigested

Answer: 1. Digested by the gut bacteria

Question 34. The number of monosaccharide units in a polysaccharide is

  1. 2
  2. 7
  3. 10
  4. More than 10

Answer: 4. More than 10

Question 35. A bond that is formed between the aldehyde or ketone group of monosaccharide and the alcoholic group of another organic compound is known as

  1. Peptide bond
  2. Glycosidic bond
  3. Phosphodiester bond
  4. Ester bond

Answer: 2. Glycosidic bond

Question 36. Which one of the following is a saturated fatty acid?

  1. Oleic acid
  2. Linoleic acid
  3. Linolenic acid
  4. Stearic acid

Answer: 4. Stearic acid

Question 37. Which of the following is the most essential fatty acid?

  1. Linoleic
  2. Linolenic
  3. Arachidonic
  4. Stearic

Answer: 1. Linoleic

Question 38. Lecithin is a

  1. Fatty acid
  2. Phospholipid with choline attached to phosphate group
  3. Cholesterol
  4. Fat

Answer: 2. Phospholipid with choline attached to a phosphate group

Question 39. Bee wax is secreted by

  1. Drones
  2. Workers
  3. Queen
  4. Hooey

Answer: 2. Workers

Question 40. Which of the following is a phospholipid?

  1. Lecithin
  2. Glycerol
  3. Oleic acid
  4. Prostaglandin

Answer: 1. Lecithin

Question 41. Keratin is a protein that has larger amount of

  1. Sulfur
  2. Calcium
  3. Magnesium
  4. Phosphorous

Answer: 1. Sulfur

Question 42. Waxes are simple lipids formed by the combination of long-chain fatty acid with a long-chain monohydric alcohol. Bee wax is made up of

  1. Palmitic and merieyl alcohol
  2. Hexacosyl palmitate
  3. Ergosterol
  4. Both (1) and (2)

Answer: 4. Both (1) and (2)

Question 43. Which is not a lipid?

  1. Lecithin
  2. β-keratin
  3. Sterol
  4. Wax

Answer: 2. β-keratin

Question 44. An anti-fertility steroid is

  1. Diosgenin
  2. Cortisol
  3. Estradiol
  4. Progesterone

Answer: 1. Diosgenin

Question 45. In the brain, most common types of lipids are

  1. Glycolipids
  2. Lipoproteins
  3. Phospholipids
  4. Steroids

Answer: 1. Glycolipids

Question 46. Find the odd one out

  1. Palmitic acid, stearic acid
  2. Oleic acid, linoleic acid
  3. Linoleic acid, oleic acid
  4. Tripalmitin. linolenic acid

Answer: 4. Tripalmitin. linolenic acid

Question 47. Which of the following are basic amino acids?

  1. Glycine and alanine
  2. Lysine and arginine
  3. Glutamic acid and aspartic acid
  4. Histidine and proline

Answer: 2. Lysine and arginine

Question 48. Which of the following is the simplest amino acid?

  1. Alanine
  2. Asparagine
  3. Glycine
  4. Tyrosine

Answer: 3. Glycine

Question 49. The hormone adrenaline (epinephrine) is formed from which of the following amino acids?

  1. Glycine
  2. Tyrosine
  3. Tryptophan
  4. Alanine

Answer: 2. Tyrosine

Question 50. Which of the following amino acids is involved in the formation of heme?

  1. Tryptophan
  2. Tyrosine
  3. Glycine
  4. Histidine

Answer: 3. Glycine

Question 51. Vitamin nicotinamide as well as the plant hormone indole-3-acetic acid are fonned from

  1. Tryptophan
  2. Alanine
  3. Glutamic acid
  4. Serine

Answer: 1. Tryptophan

Question 52. On losing the carboxyl group as carbon dioxide, amino acids form biologically active

  1. Glucose
  2. Amine such as histamine
  3. Alcohol
  4. N-base

Answer: 2. Amine such as histamine

Question 53. The skin pigment melanin is formed from

  1. Tyrosine
  2. Adrenaline
  3. Indole-3-acetic acid
  4. Tryptophan

Answer: 1. Tyrosine

Question 54. Which one of the following is an alcoholic amino acid pair?

  1. Tyrosine and serine
  2. Threonine and serine
  3. Phenylalanine and tyrosine
  4. Tryptophan and phenylalanine

Answer: 2. Threonine and serine

Question 55. One of the following is not an essential amino acid?

  1. Tryptophan and valine
  2. Lysine and methionine
  3. Leucine and isoleucine
  4. None of these

Answer: 4. None of these

Question 56. One of the following amino acids does not contain sulfur.

  1. Tryptophan
  2. Methionine
  3. Cystine
  4. Cysteine

Answer: 1. Tryptophan

Question 57. One of the following is a heterocyclic amino acid.

  1. Proline
  2. Histidine
  3. Hydroxyproline
  4. All of these

Answer: 4. All of these

Question 58. One of the following is a neutral amino acid.

  1. Arginine
  2. Glycine
  3. Glutamic acid
  4. Aspartic acid

Answer: 2. Glycine

Question 59. Which of the following is a non-polar amino acid?

  1. Alanine
  2. Glutamic acid
  3. Serine
  4. None of these

Answer: 1. Alanine

Question 60. β-plated structure of protein is present in silk fibers, the protein is

  1. Fibroin
  2. Collagen
  3. Rayon
  4. Keratin

Answer: 1. Fibroin

Question 61. The keratin of hair has

  1. Secondary structure
  2. a-helical structure
  3. β-plated structure
  4. Primary structure

Answer: 2. a-helical structure

Question 62. Most of the blood proteins in our body are

  1. Basic
  2. Acidic
  3. Neutral
  4. Basic and Neutral

Answer: 2. Acidic

Question 63. The casein of milk is

  1. Glycoprotein
  2. Phosphoprotein
  3. Chromoprotein
  4. Metalloprotein

Answer: 2. Phosphoprotein

Question 64. Prolamines are

  1. Associated with nucleic acids
  2. Storage proteins
  3. Enzymatic protein
  4. Structural protein

Answer: 2. Storage proteins

Question 65. Which of the proteins is involved in the transport of organic compounds through phloem?

  1. Protamine
  2. P-Protein
  3. Myosin
  4. Glutelin

Answer: 2. P-Protein

Question 66. Cheese is a

  1. Globular protein
  2. Conjugated protein
  3. Denatured protein
  4. All of these

Answer: 3. Denatured protein

Question 67. The storage protein of wheat is

  1. Glutelin
  2. Oryzin
  3. Hordein
  4. Zein

Answer: 1. Glutelin

Question 68. The types of prolamines and glutelins found in wheat are

  1. Zein and Gladin
  2. Glutelin and hordein
  3. Gliadin and glutenin
  4. Hordein and zein

Answer: 3. Gliadin and glutenin

Question 69. Which of the following is a contractile protein?

  1. P-protein
  2. Myosin
  3. Albumin
  4. Penneases

Answer: 2. Myosin

Question 70. The storage protein found in castor oil seeds is

  1. Legumin
  2. Tuberin
  3. Ricin
  4. Leucosin

Answer: 3. Ricin

Question 71. Glycogen is stored in

  1. Liver and muscles
  2. Liver only
  3. Muscles only
  4. Pancreas

Answer: 1. Liver and muscles

Question 72. Cholesterol is synthesized in

  1. Pancreas
  2. Burnner’s gland
  3. Spleen
  4. Liver

Answer: 4. Liver

Question 73. Which is a disaccharide

  1. Galactose
  2. Fructose
  3. Maltose
  4. Dextrin

Answer: 3. Maltose

Question 74. Which element is normally absent in proteins

  1. C
  2. N
  3. S
  4. P

Answer: 4. P

Question 75. Which substance is not a carbohydrate

  1. Starch
  2. Glycogen
  3. Wax
  4. Glucose

Answer: 3. Wax

Question 76. To get quick energy, one should use

  1. Carbohydrate
  2. Fats
  3. Vitamins
  4. Proteins

Answer: 1. Carbohydrate

Question 77. The protein most abundant in the human body is

  1. Collagen
  2. Myosin
  3. Actin
  4. Albumin

Answer: 1. Collagen

Question 78. Which is not a polysaccharide?

  1. Sucrose
  2. Starch
  3. Glycogen
  4. Cellulose

Answer: 1. Sucrose

Question 79. Decreasing order of amount of organic compound in animal body

  1. Carbohydrates, protein, fat, and nucleic acid
  2. Protein, fats, nucleic acid, and carbohydrate
  3. Protein, fats, carbohydrates, and nucleic acid
  4. Carbohydrates, fats, proteins, and nucleic acid

Answer: 3. Protein, fats, carbohydrates, and nucleic acid

Question 80. Characteristic feature of hemoglobin

  1. Reversible union with oxygen
  2. Red color
  3. Presence of Cu
  4. Presence of Globulin protein

Answer: 1. Reversible union with oxygen

Question 81. External coat composed of cellulose-like material occurs in

  1. Hemichordata
  2. Urochordata
  3. Cephalochordata
  4. Cyclostomata

Answer: 2. Urochordata

Question 82. Common in feathers and silk is

  1. Carbohydrate
  2. Fats
  3. Protein
  4. Nucleic acid

Answer: 3. Protein

Question 83. Monosaccharide is

  1. Pentose sugar
  2. Hexose sugar
  3. Only glucose
  4. All the above

Answer: 4. All the above

Question 84. Sugar which is found in the hemolymph of insects is called

  1. Maltose
  2. Lactose
  3. Trehalose
  4. Galactose

Answer: 3. Trehalose

Question 85. Which substance is most abundant in cells?

  1. Carbohydrates
  2. Protein
  3. Water
  4. Fats

Answer: 3. Water

Question 86. Proteins which present in protoplasm are very important because

  1. They provide definite shape to cell
  2. They function as biocatalysts
  3. They yield energy
  4. They are stored food

Answer: 2. They function as biocatalysts

Question 87. Dipeptide is

  1. Structure of two peptide bonds
  2. Two amino acids linked by one peptide bond
  3. The bond between one amino acid and one peptide
  4. None

Answer: 2. Two amino acids linked by one peptide bond

Question 88. Which amino acid is non-essential for the human body?

  1. Glycine
  2. Phenylalanine
  3. Arginine
  4. Methionine

Answer: 1. Glycine

Question 89. In which form, the extra sugars is stored in the body?

  1. Glucose monosaccharide
  2. Sucrose disaccharide
  3. Glycogen polysaccharide
  4. Fatty acid and glycerol

Answer: 3. Glycogen polysaccharide

Question 90. Products of protein catabolism are

  1. NH3, CO2, and urea
  2. Urea, CO2, and NH
  3. Urea, NH3, and uric acid
  4. Urea, NH3, alanine, and creatine

Answer: 1. NH3, CO2, and urea

Question 91. Galactosemia disease in children can be prevented if they are provided

  1. Milkless food
  2. Proteinaceous milk
  3. More milk
  4. Vitamin-less milk

Answer: 1. Milkless food

Question 92. Glycogen is

  1. Polymer of amino acids
  2. Polymer of fatty acids
  3. Unsaturated fats
  4. Polymer of glucose

Answer: 4. Polymer of glucose

Question 93. Carbohydrate is

  1. Polymer of fatty acids
  2. Polymer of amino acids
  3. Polyhydroxy aldehyde or ketone
  4. None

Answer: 3. Polyhydroxy aldehyde or ketone

Question 94. In which form, food is stored in the animal body?

  1. Glucose
  2. Glycogen
  3. Cellulose
  4. ATP

Answer: 2. Glycogen

Question 95. Which compound produces more than twice the amount of energy as compared to carbohydrates?

  1. Protein
  2. Fats
  3. Vitamins
  4. Glucose

Answer: 2. Fats

Question 96. What is the normal ratio of sugar in human blood?

  1. 0.01%
  2. 0.1%
  3. 1%
  4. 0.18%

Answer: 2. 0.1%

Question 97. Carbohydrates are stored in mammals as

  1. Glucose in liver
  2. Glycogen in muscles and spleen
  3. Lactic acid in muscles
  4. Glycogen in liver and muscles

Answer: 4. Glycogen in the liver and muscles

Question 98. Carbohydrate metabolism is controlled by

  1. Parathormone
  2. Insulin
  3. Glucose
  4. Vitamin B12

Answer: 2. Insulin

Question 99. Fattiness is due to the excess of

  1. Connective tissue
  2. Blood
  3. Muscular tissue
  4. Adipose tissue

Answer: 4. Adipose tissue

Question 100. Which one of the following is polysaccharide?

  1. Sucrose
  2. Lactose
  3. Glycogen
  4. Glucose

Answer: 3. Glycogen

Question 101. A starving person will first use

  1. Fats
  2. Glycogen
  3. Blood
  4. Muscle protein

Answer: 2. Glycogen

Question 102. Units of proteins that unite in long chains to form proteins are called

  1. Sugar
  2. Purines
  3. Pyrimidines
  4. Amino acids

Answer: 4. Amino acids

Question 103. Milk protein is

  1. Lactogen
  2. Myosin
  3. Casein
  4. Pepsin

Answer: 3. Casein

Question 104. Chemically, enzymes are

  1. Fats
  2. Carbohydrates
  3. Hydrocarbons
  4. Proteins

Answer: 4. Proteins

Question 105. Long-chain molecules of fatty acids are formed by

  1. Polymerization of two carbon compounds
  2. Decomposition of fats
  3. Polymerization of glycogen
  4. Conversion of glycogen

Answer: 1. Polymerization of two carbon compounds

Question 106. Most simple amino acid is

  1. Tyrosine
  2. Lysine
  3. Glycine
  4. Aspartic acid

Answer: 3. Glycine

Question 107. Fats in the body are formed when

  1. Glycogen is formed from glucose
  2. Sugar level become stable in the blood
  3. Extra glycogen storage in the liver and muscles is stopped
  4. All of them

Answer: 3. Extra glycogen storage in liver and muscles is stopped

Question 108. For body growth and repair, one needs

  1. Carbohydrates
  2. Fats
  3. Protein
  4. Vitamins

Answer: 3. Protein

Question 109. In India, the best source for proteins in herbivorous persons is

  1. Pulses
  2. Potato
  3. Egg
  4. Meat

Answer: 1. Pulses

Question 110. Proteins are conducted in the body in the form of

  1. Amino acids
  2. Natural protein
  3. Enzymes
  4. Nucleic acids

Answer: 1. Amino acids

Question 111. Which is sweet in taste, but is not sugar?

  1. Starch
  2. Saccharine
  3. Lactose
  4. Protein

Answer: 2. Saccharine

Question 112. The formation of protein can be considered as

  1. Dehydration synthesis
  2. Dehydration analysis
  3. Hydration synthesis
  4. Hydration analysis

Answer: 1. Dehydration synthesis

Question 113. Translocation of sugars in flowering plants occurs in the form of

  1. Glucose
  2. Sucrose
  3. Fructose
  4. Maltose

Answer: 2. Sucrose

Question 114. Sucrose is composed of

  1. Glucose and fructose
  2. Glucose and glycogen
  3. Two molecules of glucose
  4. Glycogen and fructose

Answer: 1. Glucose and fructose

Question 115. Which of the following amino acid is essential?

  1. Alanine
  2. Glycine
  3. Tryptophan
  4. Tyrosine

Answer: 3. Tryptophan

Question 116. Which of the following disaccharides will give two molecules of glucose on hydrolysis?

  1. Maltose
  2. Sucrose
  3. Lactose
  4. None

Answer: 1. Maltose

Question 117. Which is the most structural part of the body?

  1. Protein
  2. Carbohydrates
  3. Lipid
  4. Nucleic acid

Answer: 1. Protein

Question 118. Which of the following sugar is found in ATP?

  1. Deoxyribose
  2. Ribose
  3. Trehalose
  4. Glucose

Answer: 2. Ribose

Question 119. Deficiency of protein leads to

  1. Rickets
  2. Scurvy
  3. Kwashiorkor
  4. Carotenemia

Answer: 3. Kwashiorkor

Question 120. Lactose is composed of

  1. Glucose + Galactose
  2. Glucose + Fructose
  3. Glucose + Glucose
  4. Glucose + mannose

Answer: 1. Glucose + Galactose

Question 121. The true statement for cellulose molecules is

  1. β-1′-4″ linkage, unbranched
  2. β-1′-4″ linkage, branched
  3. β-1′-4″ linkage, branched
  4. β-1′-6″ linkage, unbranched

Answer: 1. β-1′-4″ linkage, unbranched

Question 122. Contractile protein is

  1. Actin
  2. Myosin
  3. Troponin
  4. Tropomyosin

Answer: 1. Actin

Question 123. Variations in proteins are due to

  1. Sequence of amino acids
  2. Number of amino acids
  3. R-group
  4. None

Answer: 1. Sequence of amino acids

Question 124. The antibodies are

  1. γ-globulins
  2. Albumins
  3. Vitamins
  4. Sugar

Answer: 1. γ-globulins

Question 125. Which of the following does not contain metal?

  1. Glycoproteins
  2. Ferritin
  3. Cytochromes
  4. Chromoproteins

Answer: 1. Glycoproteins

Question 126. Which protein is found in the maximum amount?

  1. Catalase
  2. Zinc carbonic anhydrase
  3. Transferase
  4. RuBisCO

Answer: 4. RuBisCO

Question 127. Proteoglycan in cartilages, which is part of polysaccharide. is

  1. Chondroitin
  2. Ossein
  3. Casein
  4. Cartilage

Answer: 1. Chondroitin

Question 128. In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids?

  1. 20
  2. 64
  3. 61
  4. 60

Answer: 3. 61

Question 129. Enzyme concerned with the transfer of electrons is

  1. Hydrolase
  2. Dehydrogenase
  3. Transaminase
  4. Protease

Answer: 2. Dehydrogenase

Question 130. At which pH, enzymes of lysosomes are usually active?

  1. 5
  2. 7
  3. 8
  4. At any pH

Answer: 3. 8

Question 131. Enzymes are made up of

  1. Edible proteins
  2. Proteins
  3. Nitrogen-containing carbohydrates
  4. Carbohydrates

Answer: 4. Carbohydrates

Question 132. Hydrolytic enzymes, which act on low pH are called as

  1. Protease
  2. α-Amylase
  3. Hydrolases
  4. Peroxidase

Answer: 2. α-Amylase

Question 133. Enzymes, vitamins, and hormones can be classified into a single category of biological chemicals because all of these

  1. Enhance oxidative metabolism
  2. Are conjugated proteins
  3. Are exclusively synthesized in the body of a living organism
  4. Help in regulating metabolism

Answer: 1. Enhance oxidative metabolism

Question 134. Which of the following statements regarding enzyme inhibition is correct?

  1. Non-competitive inhibition of an enzyme can be overcome by adding a large amount of substrate.
  2. Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein.
  3. Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme.
  4. Non-competitive inhibitors often bind to the enzyme irreversibly.

Answer: 2. Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein.

Question 135. The catalytic efficiency of two different enzymes can be compared by

  1. KM value
  2. pH optimum value
  3. Formation of the product
  4. The molecular size of the enzyme

Answer: 3. Formation of the product

Question 136. The graph given shows the effect of substrate concentration on the rate of reaction of the enzyme green-gram-phosphatase. What does the graph indicate?

NEET Biology Biomolecules Effect Of A Non Competitive Inhibitor On The Reaction Velocity Versus Substances Plot

  1. The rate of enzyme reaction is directly proportional to the substrate concentration.
  2. Presence of an enzyme inhibitor in the reaction mixture.
  3. Formation of an enzyme-substrate complex.
  4. At higher substrate concentrations, the pH increases.

Answer: 4. At higher substrate concentrations, the pH increases.

Question 137. An organic substance bound to an enzyme and essential for its activity is called

  1. Apoenzyme
  2. Isoenzyme
  3. Coenzyme
  4. Holoenzyme

Answer: 3. Coenzyme

Question 138. Shows the conservation of a substrate into the product by an enzyme. In which one of the four options (1-4).

NEET Biology Biomolecules Conservation Of A Substrate Into Product By Enzyme

NEET Biology Biomolecules Conversion Of A Substrate Into Product By An Enzyme

Answer: 1

Question 139. Three of the following statements about enzymes are correct which one is wrong?

  1. Enzymes are denatured at high temperatures but in the c era in exceptional organisms they are effective even a: temperatures 80-90°C.
  2. Enzymes are highly specific.
  3. Most enzymes are proteins but some are lipids.
  4. Enzymes require optimum pH for maximal activity.

Answer: 3. Most enzymes are proteins but some are lipids.

Question 140. DNA or RNA segment tagged with a radioactive molecule is called

  1. Vector
  2. Probe
  3. Clone
  4. Plasmid

Answer: 2. Probe

Question 141. The main area of various types of activities

  1. Plasma membrane
  2. Mitochondrion
  3. Cytoplasm
  4. Nucleus

Answer: 3. Cytoplasm

Question 142. Given it is the diagrammatic representation of one of the categories of small molecular weight organic compounds in the thing tissues. Identify the category shown and the one blank component “X“ in it.

NEET Biology Biomolecules Diagrammatic Representation Of One Of The Categories Of Small Molecular

NEET Biology Biomolecules Category And Components

Answer: 3

Question 143. Which one out of 1-4 given below correctly represents the structural formula of the basic amino acid?

NEET Biology Biomolecules Structural Formula Of Basic Amino Acid

  1. 4
  2. 1
  3. 2
  4. 3

Answer: 1. 4

Question 144. Which one of the following biomolecules is correctly characterized?

  1. Lecithin—A phosphorylated glyceride found in the cell membrane
  2. Palmitic acid—An unsaturated fatty acid with 18 carbon atoms
  3. Adenylic acid—Adenosine with a glucose phosphate molecule
  4. Alanine amino acid—Contains an amino group and an acidic group anywhere in the molecule

Answer: 1. Lecithin—A phosphorylated glyceride found in the cell membrane

Question 145. A phosphoglyceride is always made up of

  1. Only an unsaturated fatty acid is esterified to a glycerol molecule to which a phosphate group is also attached.
  2. A saturated or unsaturated fatty acid is esterified to a glycerol molecule to which a phosphate group is also attached.
  3. A saturated or unsaturated fatty acid is esterified to a phosphate group which is also attached to a glycerol molecule.
  4. Only a saturated fatty acid is esterified to a glycerol molecule to which a phosphate group is also attached.

Answer: 2. A saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached.

Question 146. The essential chemical components of many enzymes are

  1. Nucleic acids
  2. Carbohydrates
  3. Vitamins
  4. Proteins

Answer: 3. Vitamins

Question 147. The transition state structure of the substrate formed during an enzymatic reaction is

  1. Permanent but unstable
  2. Transient and unstable
  3. Permanent and stable
  4. Transient but stable

Answer: 2. Transient and unstable

Question 148. The most abundant intracellular cation is

  1. Ca++
  2. H+
  3. K+
  4. Na+

Answer: 3. K+

Question 149. Macromolecules chitin is a

  1. Phosphorus-containing polysaccharide
  2. Sulfur-containing polysaccharide
  3. Simple polysaccharide
  4. Nitrogen-containing polysaccharide

Answer: 4. Nitrogen-containing polysaccharide

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