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nikhil04
@nikhil04
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Joined: Aug 19, 2020
Last seen: Jan 13, 2022
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Answer to: Assertion: Enzymes lower the activation energy. Reason: A substrate molecule can be acted upon by a particular enzyme.

Correct option: (b) Explanation: Activation energy is an external supply of energy which is needed for the initiation of the chemical reaction. Ac...

5 years ago
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Answer to: Assertion: Coenzymes serve as co-factors in a number of different enzyme catalyzed reactions.

Correct option: (b) Explanation: Cofactor may be inorganic or organic in nature. Organic cofactors are of two types, coenzymes and prosthetic grou...

5 years ago
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Answer to: Assertion: Allosteric enzymes show feedback inhibition. Reason: The inhibitor is competitive.

(c) If Assertion is correct but Reason is incorrect. Explanation: Feed back inhibition is a type of reversible inhibition found in allosteric enzy...

5 years ago
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Answer to: Assertion: The amino acid glycine comes under the category of nonessential amino acids.

(c) If Assertion is correct but Reason is incorrect. Explanation: Non-essential amino acids are those amino acids which need not be supplied in th...

5 years ago
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Answer to: Assertion: Unsaturated fats are more reactive compared with the saturated fats.

(c) If Assertion is correct but Reason is incorrect. Explanation: Compound having double bond in their structure are more unstable compound in com...

5 years ago
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Answer to: Assertion: Human diet should compulsorily contain glycine, serine and tyrosine.

(d) If both the Assertion and Reason are incorrect. Explanation: Essential amino acids are those which are taken from food and not synthesized in ...

5 years ago
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Answer to: Assertion: Vegetable oils are fats which are present in plant cells in soluble form.

(d) If both the Assertion and Reason are incorrect. Explanation: Vegetable oils and fats are present in plants in insoluble form. They are extract...

5 years ago
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Answer to: Assertion: Enzymes have active sites and substrates have reactive sites on their surface respectively.

(d) If both the Assertion and Reason are incorrect. Explanation: Enzymes are biocatalyst that increases the speed of a chemical reaction without t...

5 years ago
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Answer to: Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by

(a) base-sugar-phosphate. Explanation: Nucleotides are the building blocks of nucleic acid. Each nucleotide consists of three parts: a sugar (ribo...

5 years ago
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Answer to: Inorganic catalyst work efficiently at _______temperature and ________ pressure.

(d) high, high Explanation: Inorganic catalyst work efficiently at high temperature and high pressure. Inorganic catalysts speed up reactions, but...

5 years ago
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Answer to: The Km value of the enzyme is the value of the substrate concentration at which the reaction reaches to

(c) ½ Vmax Explanation: The concentration of substrate at which velocity of enzymatic action reaches half of its maximum value, is called Km value...

5 years ago
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Answer to: Which one of the following is a non - reducing carbohydrate?

(b) Sucrose Explanation: Sucrose is classified under non-reducing sugar because it does not have any free aldehyde or keto group.

5 years ago
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Answer to: Which of the following type of enzyme is not matched correctly with the molecule that it breaks down?

(b) Lipase–starch Explanation: Lipases are enzymes found in the small intestine of humans that help in the breakdown of fats.

5 years ago
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Answer to: Which one of the following statements regarding starch and cellulose is not correct?

(c) Both of them give colour with iodine. Explanation: Starch is the reserve substance in plant cells whereas cellulose is the most important stru...

5 years ago
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Answer to: Alpha-keratin is a protein present in

(b) skin Explanation: Alpha-keratin is present in high quantity in skin and epidermal appendages like hair and nail.

5 years ago
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Answer to: Michaelis constant Km is equal to

(b) K2 + K3/K1 Explanation: Michaels constant Km is equal to K2 + K3/K1

5 years ago
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Answer to: Which statement is true? (a) Adenine has 4 nitrogen atoms. (b) Cytosine has 3 nitrogen atoms.

(a) Adenine has 4 nitrogen atoms. Explanation: Nucleotides contain carbon, hydrogen, oxygen, nitrogen and phosphorous. Nucleotides are either puri...

5 years ago
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Answer to: Which of the following contain β-1, 4 linkage?

(c) Lactose Explanation: Lactose or milk sugar, found exclusively in milk, contain β-1,4 linkage. It is a disaccharide formed by combination of ga...

5 years ago
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Answer to: Which of the following set of three items are not true as each set belongs to the category mentioned against them

(c) Rennin, helicase and hyaluronidase - Enzyme Explanation: Thiamine is a nitrogen base; myosin is a muscle protein; occulomotor nerve is motor a...

5 years ago
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Answer to: An example of competitive inhibition of an enzyme is the inhibition of

(a) succinic dehydrogenase by malonic acid Explanation: Enzyme inhibition caused by a substance resembling substrate molecule through blocking its...

5 years ago
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