This practice test contains 25 most important MCQ questions from the chapter Biomolecules Class 11th Biology.
Biomolecules : Biology Revision Test (Class 11th) | MCQs for NEET
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Total: 25 Questions
Questions
Q1.
Feedback inhibition of enzymes is affected by which of the following
📘 Explanation:
end products
Q2.
An example of competitive inhibition of an enzyme is the inhibition of
📘 Explanation:
succinic dehydrogenase by malonic acid
Q3.
Insulin is made up of _______ and _______.
📘 Explanation:
Insulin is a polysaccharide made up of glucose and fructose.
Q4.
Enzymes increase the rate of reaction by
📘 Explanation:
Enzymes increase the rate of reaction by decreasing the activation energy.
Q5.
Which of the following statements regarding enzyme inhibition is correct?
📘 Explanation:
Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme
Q6.
Which of the following is not a pyrimidine?
📘 Explanation:
Guanine is a purine.
Q7.
Hydrolysis of starch occurs with the help of
📘 Explanation:
Amylase
Q8.
Assertion: Arachidic acid is an unsaturated fatty acid Reason: There are one or more double bonds between carbon atoms in unsaturated fatty acids
📘 Explanation:
Both Assertion and Reason are false
Q9.
Which of the following influence feedback inhibition of enzyme?
Q10.
Which of the following is not a polysaccharide?
📘 Explanation:
Lactose is a disaccharide made up of glucose and galactose.
Q11.
Inulin is made up of _______ and _______
📘 Explanation:
Inulin is a polysaccharide made up of glucose and fructose
Q12.
A protein having both structural and enzymatic traits is
📘 Explanation:
Myosin
Q13.
NADP contains vitamin ______
📘 Explanation:
B3 also named as niacin.
Q14.
With reference to enzymes, which one of the following statements is true?
📘 Explanation:
Holoenzyme = Apoenzyme + Coenzyme
Q15.
Inhibitor binds to the active site of the enzyme. Hence blocking the reaction. This is an example of
📘 Explanation:
When substrate binds to the active site of the enzyme, it completes the reaction.When inhibitor binds to the active site of the enzyme, it blocks the reaction
Q16.
The fastest enzyme known is
📘 Explanation:
The fastest enzyme known is carbonic anhydrase. It converts 106 molecules of carbon dioxide molecules per second.
Q17.
Lecithin is a
📘 Explanation:
Lecithin is a phospholipid.
Q18.
The minimum amount of energy required to initiate a chemical reaction is called
📘 Explanation:
The minimum amount of energy required to initiate a chemical reaction is called activation energy
Q19.
Enzymes, vitamins and hormones are common in
Q20.
Nitrogenous bases present in DNA
📘 Explanation:
Adenine, guanine, cytosine, thymine
Q21.
Metabolic intermediates found in living system which are essential for growth and life is called___________
📘 Explanation:
Primary metabolites
Q22.
Enormous diversity of protein molecules is due to
📘 Explanation:
Sequence of amino acids
Q23.
Anti-parallel strands of a DNA molecule mean that
📘 Explanation:
Phosphate groups at the start of two DNA strands (poles) are in opposite position
Q24.
The introduction of t-DNA into plants involves
Q25.
The most common monomer of carbohydrates is
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