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Assertion & Reason Test: Biomolecules - Grade 12 MCQ


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10 Questions MCQ Test - Assertion & Reason Test: Biomolecules

Assertion & Reason Test: Biomolecules for Grade 12 2024 is part of Grade 12 preparation. The Assertion & Reason Test: Biomolecules questions and answers have been prepared according to the Grade 12 exam syllabus.The Assertion & Reason Test: Biomolecules MCQs are made for Grade 12 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Assertion & Reason Test: Biomolecules below.
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Assertion & Reason Test: Biomolecules - Question 1

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Palmitic acid is an unsaturated fatty acid.

Reason : These are fatty acids with double bond.

Detailed Solution for Assertion & Reason Test: Biomolecules - Question 1
Palmitic acid is a saturated fatty acid. These are fatty acids without double bond.
Assertion & Reason Test: Biomolecules - Question 2

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Glutamate pyruvate transaminase is a transferase enzyme.

Reason : They transfer group from one molecule to another.

Detailed Solution for Assertion & Reason Test: Biomolecules - Question 2
Transferases transfer group from one molecule to another e.g., glutamate pyruvate transaminase.
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Assertion & Reason Test: Biomolecules - Question 3

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : In peroxidase, haemoglobin, myoglobin and catalase, haem is prosthetic group.

Reason : Prosthetic groups are non-protein organic factors which are firmly attached to the apoenzyme.

Detailed Solution for Assertion & Reason Test: Biomolecules - Question 3
Prosthetic groups are non-protein organic factors which are firmly attached to the apoenzyme. e.g. In peroxidase, haemoglobin, myoglobin and catalase, haem is prosthetic group.
Assertion & Reason Test: Biomolecules - Question 4

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Lipids are not strictly macromolecules.

Reason : Lipids are indeed small molecular weight but because of their association with membranes separate in the macromolecular fraction.

Detailed Solution for Assertion & Reason Test: Biomolecules - Question 4
The molecular weights of macromolecules ranges to ten thousand Daltons and above. However, lipids, whose molecular weights do not exceed 800 Da, that comes under macromolecular fraction. Lipids are also arranged into structures like cell membrane and other membranes. On grinding, these membrane fragments in the form of vesicles get separated along with the acid insoluble pool and hence in the macromolecular fraction. Hence, lipids are not strictly macromolecules.
Assertion & Reason Test: Biomolecules - Question 5

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Lysine is an essential amino acid.

Reason : It can be synthesized in our body to meet the biological needs.

Detailed Solution for Assertion & Reason Test: Biomolecules - Question 5
Lysine is an essential amino acid because it cannot be synthesized by the body and therefore, need to be supplied through the diet.

The amino acids that can be synthesized in our body to meet the biological needs are called as non-essential amino acid e.g., glycine.

Assertion & Reason Test: Biomolecules - Question 6

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : ATP is known as the energy currency of the cell.

Reason : ATP can pick up energy where it is being liberated and supply the same where it is being consumed.

Detailed Solution for Assertion & Reason Test: Biomolecules - Question 6
ATP is called energy currency of the cell. It can pick up energy where it is being liberated and supply the same where it is being consumed.
Assertion & Reason Test: Biomolecules - Question 7

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Haemoglobin has quaternary structure.

Reason : Haemoglobin has four chains, two α-chains and two β-chains.

Detailed Solution for Assertion & Reason Test: Biomolecules - Question 7
Large proteins such as haemoglobin have quaternary structure. It has four chains, two α-chains and two β-chains.
Assertion & Reason Test: Biomolecules - Question 8

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Nucleic acids exhibit secondary structure.

Reason : It is the linear sequence of amino acids in a polypeptide chain.

Detailed Solution for Assertion & Reason Test: Biomolecules - Question 8
It is a linear sequences of nucleotides in a polynucleotide chain. Primary structure of protein is the linear sequence of amino acids in a polypeptide chain reveals primary structure of protein.
Assertion & Reason Test: Biomolecules - Question 9

Assertion (A): Enzymes lower the activation energy of biochemical reactions.
Reasoning (R): Lowering the activation energy increases the rate at which products are formed from substrates.

Detailed Solution for Assertion & Reason Test: Biomolecules - Question 9

The assertion is true because enzymes act as catalysts that accelerate biochemical reactions by lowering the activation energy required for the reaction to proceed. The reasoning is also true and correctly explains the assertion because by lowering the activation energy, enzymes enable the reaction to occur more easily and quickly, thus increasing the rate of product formation.

Assertion & Reason Test: Biomolecules - Question 10

Assertion (A): All proteins are enzymes.
Reasoning (R): Enzymes are proteins that catalyze chemical reactions in living organisms.

Detailed Solution for Assertion & Reason Test: Biomolecules - Question 10

The assertion is false because not all proteins are enzymes; proteins can serve a wide range of functions beyond catalysis, including structural, transport, and signaling roles. The reasoning is true because enzymes are indeed a subset of proteins that specifically catalyze chemical reactions, facilitating the biochemical processes necessary for life.

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