Q1. Proteases are synthesized in an inactive form as _______?

1. Proenzyme
2. Zymogen
3. Pepsin
4. Both A and B

ANSWER – D. Both A and B

• Explanation: Proteases (or proteolytic enzymes) are monomeric enzymes that catalyze the breakdown of peptide bonds in other proteins. To avoid causing widespread harm to all cellular proteins, they are frequently created in an inactive state known as a proenzyme or zymogen, which is then activated when needed.

READ MORE – Food Science Technology Quiz (30-10-2021)

Q2. The non-protein component of an enzyme is a cofactor in which an inactive part is termed as ____.

1. Apoenzyme
2. Holoenzyme
3. Coenzyme
4. None of the above

ANSWER: A. Apoenzyme

• Explanation: In the absence of a non-protein component known as a ‘co-factor,’ many enzyme proteins lack catalytic activity. The inactive protein component of an enzyme is referred to as the ‘apoenzyme,’ whereas the active enzyme, which includes the cofactor, is referred to as the ‘holoenzyme.’ The cofactor might be an organic molecule called a ‘coenzyme,’ or a metal ion called a ‘metal ion.’

READ MORE – Food Science Technology Quiz (10-11-2021)

Q3. Two distinct types of proteins are fibrous and globular which differ in the property of ______.

1. Size
2. Solubility in water
3. Structure
4. Binding ability

ANSWER: B. Solubility in water

• Explanation – Fibrous and globular proteins are two different forms of proteins. Fibrous proteins are physically strong and insoluble in water, allowing them to perform a structural function. Globular proteins, on the other hand, are usually water-soluble and may be crystallized from solution. Enzymes are globular proteins with a functional role in living organisms.

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Q4. Which among the following is an oligomeric enzyme?

1. Lactate dehydrogenase
2. Lactose synthase
3. Tryptophan synthase
4. All of the above

ANSWER: D. All of the above

• Explanation: Oligomeric proteins are made up of two or more polypeptide chains that are connected by non-covalent interactions rather than peptide bonds. Sub-units are the polypeptide chains that make up the whole, and they might be identical or different. Lactate dehydrogenase, lactose synthase, tryptophan synthase, and pyruvate dehydrogenase are just a few examples of oligomeric enzymes.

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Q5. The Enzyme Commission divided enzymes into _____ main classes, on the basis of the total reaction catalyzed

1. 3
2. 4
3. 5
4. 6

ANSWER: D. 6

• Explanation – On the basis of the overall reaction catalyzed, the Enzyme Commission categorized enzymes into six primary groups. Oxidoreductases, transferases, hydrolases, lyases, isomerases, and ligases are all enzymes. The name and categorization system for enzymes is based only on the reaction that is catalyzed, with no consideration for their origin or multiplicity.

READ MORE – Food Science Technology Quiz (29-11-2021)

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