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Enzymes Questions

Practice 42 Enzymes questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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42
Total Questions
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19
Easy
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20
Medium
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3
Hard
Practice by Exam:Biology(29)Chemistry(3)BIOLOGY(3)Mathematics and Science(2)Botany(2)General Awareness(1)Science(1)Zoology(1)

About Enzymes — practice questions, PYQs & concepts

Enzymes is a frequently-tested topic on Biology, Chemistry, BIOLOGY. ExamTest.live currently lists 42 Enzymes questions spanning previous-year papers from 2017 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

Enzymes weight in competitive exams

Across our Enzymes question bank, the largest sources are Biology (29), Chemistry (3), BIOLOGY (3), Mathematics and Science (2) and Botany (2). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 19 easy Enzymes questions are available — build fluency before moving up.
  • Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
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  • Read every explanation: Even on questions you got right — the explanation often surfaces a faster approach you can reuse.

All Enzymes Questions(1–42 of 42)

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Q1mediummcqGeneral AwarenessCompetitive Exam2026
0% accuracy
Which antimicrobial enzymes are present in milk?
Q2mediummcqBiologyGeneral Knowledge2026
0% accuracy
The most abundant enzyme in the living world is _________.
Q3easymcqBiologyNEET (UG) 20172026
0% accuracy
Which one of the following statements is correct, with reference to enzymes?
Q4mediummcqBiologyNEET 20192026
0% accuracy
Consider the following statement:
(A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group.
(B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme.
Select the correct option.
Q5mediummcqScienceSSC CGL2026
100% accuracy
Peeling, cutting or crushing onion tissue releases which enzyme that makes our eyes water?
Q6mediummcqBiologyGovernment Competitive Exam2026
0% accuracy
The saliva in human beings contains which enzyme?
Q7hardmcqBiologyIndian Competitive Exams2026
Which non-essential amino acid is synthesised by the hydroxylation of phenylalanine in a reaction catalysed by phenylalanine hydroxylase?
Q8mediummcqBiologyCompetitive Exam2026
Salivary amylase breaks down ________.
Q9easymcqChemistryAIEEE 20042026
Identify the correct statements regarding enzymes:
Q10easymcqBotanyNEET 2024 R1@NUM: 1352026
The cofactor of the enzyme carboxypeptidase is:
Q11mediummcqBotanyNEET 2024 R1@NUM: 1192026
Inhibition of succinic dehydrogenase enzyme by malonate is a classical example of:
Q12mediummcqZoologyNEET 2024 R1@NUM: 1562026
Match List I with List II:
image
Q13easymcqBiologyNEET 20232026
Malonate inhibits the growth of pathogenic bacteria by inhibiting the activity of:
Q14easymcqBiologyNEET 20232026
Given below are two statements:Statement I: Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat.Statement II: When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor.In the light of the above statements, choose the correct answer:
Q15easymcqChemistryNEET 20222026
The incorrect statement regarding enzymes is:
Q16mediummcqBiologyNEET 2020 E12026
The enzyme enterokinase helps in conversion of:
Q17easymcqBIOLOGYNEET 20192026
An enzyme catalysing the removal of nucleotides from ends of DNA is:
Q18easymcqBIOLOGYNEET 20192026
Match the following enzymes with their functions:Column I: (a) Restriction endonuclease, (b) Exonuclease, (c) DNA ligase, (d) Tag polymeraseColumn II: (i) joins DNA fragments, (ii) extends primers, (iii) cuts DNA at specific position, (iv) removes nucleotides from ends
Q19easymcqBIOLOGYNEET 20192026
Prosthetic groups differ from co-enzymes in that:
Q20mediummcqBiologyCompetitive Examination2026
The fermentation ability of Yeast is primarily due to the enzyme complex known as:
Q21easymcqBiologyNEET 20172026
Which one of the following statements is correct, with reference to enzymes?
Q22mediummcqBiologyNEET (UG) 20182026
Select the correct match:
Q23easymcqMathematics and ScienceUPTET Paper 2 (Maths & Science)2017
Enzymes are chemically
Q24easymcqMathematics and ScienceUPTET Paper 2 (Maths & Science)2017
Biological enzymes are chemically categorized as
Q25mediummcqBiologyBiology
0% accuracy
Given below is a sample of a portion of DNA strand. What is so special shown in it?
Q26mediummcqBiologyBiology
0% accuracy
The curve given below shows enzymatic activity with relation to three conditions (pH, temperature and substrate concentration). What do the two axes (x and y) represent?
image
Q27mediummcqBiologyBiology
0% accuracy
Which one of the following enzymes carries on the initial step in the digestion of milk in humans?
Q28mediummcqBiologyBiology
0% accuracy
Lysozyme that is present in perspiration, saliva and tears, destroys:
Q29easymcqBiologyBiology
Which one is a true statement regarding DNA polymerase used in PCR?
Q30easymcqBiologyBiology
A patient brought to a hospital with myocardial infarction is normally immediately given:
Q31mediummcqChemistryChemistry
Which one of the following statements is INCORRECT about enzyme catalysis?
Q32easymcqBiologyBiology
For its activity, carboxypeptidase requires:
Q33easymcqBiologyBiology
The transition state structure of the substrate formed during an enzymatic reaction is:
Q34mediummcqBiologyBiology
Select the option which is not correct with respect to enzyme action:
Q35easymcqBiologyBiology
The cutting of DNA at specific locations became possible with the discovery of:
Q36easymcqBiologyBiology
A non-proteinaceous enzyme is:
Q37mediummcqBiologyBiology
Which of the following describes the given graph correctly?
image
Q38mediummcqBiologyBiology
Which one of the following pairs of food components in humans reaches the stomach totally undigested?
Q39mediummcqBiologyBiology
Which one of the following pairs is wrongly matched?
Q40hardmcqBiologyBiology
Which matching of site of action, substrate, enzyme and end product is correct?
Q41easymcqBiologyBiology
A competitive inhibitor of succinic dehydrogenase is:
Q42hardmcqBiologyBiology
The given graph shows the effect of substrate concentration on the rate of reaction of the enzyme green-gram-phosphatase. What does the graph indicate?

Frequently Asked Questions

How many Enzymes questions are on ExamTest.live?▼
We have 42 Enzymes questions spread across 1 pages, covering easy, medium, and hard difficulty levels with detailed explanations.
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Which exams include Enzymes questions?▼
Enzymes questions are commonly asked in Biology, Chemistry, BIOLOGY, Mathematics and Science, Botany. You can filter by exam using the links above.
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Start with easy questions to build confidence, then tackle medium and hard ones. Use the filter buttons to sort by difficulty. Reveal the answer only after attempting each question, and read the explanation thoroughly.