Biomolecules Class 12 Chemistry MCQ. We covered all the Biomolecules Class 12 Chemistry MCQ in this post for free so that you can practice well for the exam.
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MCQ on Biomolecules Chemistry Class 12 for NEET Students
The most significant form of energy currency in living organisms is the bond energy present in
(A) carbonic acid
(B) ribonucleic acid
(C) adenosine triphosphate
(D) deoxyribonucleic acid
Option c – adenosine triphosphate
Assertion: The living state is a non-equilibrium steady state. Reason: Living beings need to carry out work incessantly.
(A) Both assertion and reason are true and the reason is the correct explanation of the assertion
(B) Both assertion and reason are true but the reason is not the correct explanation of assertion.
(C) The assertion is true but the reason is false.
(D) Both assertion and reason are false.
Option a – Both assertion and reason are true and the reason is the correct explanation of the assertion
Identify the nucleic acids that behave like enzymes.
(A) Co-enzymes
(B) Ribozymes
(C) Co-factors
(D) Hormones
Option b – Ribozymes
Which of the following does NOT alter the activity of the enzyme?
(A) Changed substrate concentration
(B) Optimum pH
(C) High temperature
(D) Binding of inhibitors to enzyme
Option b – Optimum pH
Which of the following are often used in the control of bacterial pathogens?
(A) Competitive inhibitors
(B) Apozymes
(C) Lyases
(D) Ribozymes
Option a – Competitive inhibitors
From the following identify the INCORRECT statement regarding cellulose.
(A) Plant cell walls are made of cellulose.
(B) Starch is a variant of cellulose.
(C) It is a homopolymer.
(D) They are the storehouse of energy in plant tissue.
Option d – They are the storehouse of energy in plant tissue
Identify the structure that is absolutely necessary for the biological activities of proteins.
(A) Primary
(B) Secondary
(C) Tertiary
(D) Quaternary
Option c – Tertiary
The distance between two consecutive base pairs in a dsDNA is
(A) 34 Å
(B) 3.4 Å
(C) 3.6 Å
(D) 10 Å
Option b – 3.4 Å
Complete the analogy. Carbohydrate: Glycosidic bond:: Nucleic acid: ……..
(A) lonic bond
(B) Phosphodiester bond
(C) Peptide bond
(D) Covalent bond
Option b – Phosphodiester bond
Which of the following is responsible for changing the structure of amino acids, in solutions of different pH?
(A) The presence of an H atom
(B) Ionizable nature of-NH₂ and COOH groups
(C) Presence of a – carbon atom
(D) Presence of R-functional groups
Option b – Ionizable nature of-NH₂ and COOH groups
Identify the most abundant protein in the animal world.
(A) Insulin
(B) Cellulose
(C) Collagen
(D) RuBisCo
Option c – Collagen
Assertion: Iodine does not form a blue-colored complex with cellulose. Reasons: Cellulose forms a complex helical structure.
(A) Both assertion and reason are true and the reason is the correct explanation of assertion.
(B) Both assertion and reason are true but the reason is not the correct explanation of assertion.
(C) The assertion is true but the reason is false.
(D) Both assertion and reason are false.
Option c – The assertion is true but the reason is false.
Identify the elements that are present at a higher concentration in the living matter as compared to non-living matter.
(A) Oxygen and Nitrogen
(B) Carbon and Hydrogen
(C) Phosphorous and Oxygen
(D) Sulphur and Nitrogen
Option b – Carbon and Hydrogen
The term biomolecules refer to
(A) all the carbon compounds in living tissues.
(B) the total ash content obtained after drying of tissue.
(C) only inorganic compounds present in the acid-soluble fraction
(D) inorganic elements and compounds of living organisms.
Option a – all the carbon compounds in living tissues.
From the following identify the odd one out based on the general determinants of the chemical and physical properties of amino acids.
(A) Carboxyl group
(B) Amide group
(C) R functional group
(D) Amino group
Option b – Amide group
We covered all the biomolecules class 12 chemistry mcq above in this post for free so that you can practice well for the exam.
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