B-DNA is the most common form of DNA having all the following salient features except
1. The pitch would be 34 Å
2. The strand turns 36° at each step of ascent
3. The rise per base pair is 3.6 Å
4. One full turn of helical strand involves 10 base pairs
Subtopic: Nucleic Acid | The DNA |
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Match column I with column II and select the correct option.
Column I Column II
a. Phosphate and hydroxyl group of (i) Peptide bond
sugar in a nucleotide
b. Polymer of amino acids (ii) Glycosidic bond
c. Polysaccharides (iii) Hydrogen bond
d. Adenine and thymine (iv) Ester bond
in a DNA
1. a(ii), b(iii), c(iv), d(i)
2. a(ii), b(iv), c(iii), d(i)
3. a(iv), b(i), c(ii), d(iii)
4. a(iv), b(i), c(iii), d(ii)
Subtopic: The DNA | Amino Acids | Zwitter ion & Peptide Bond | Carbohydrates: Glycosidic Bond & Disaccharide |
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Read the statements A and B carefully and select the correct answer.
Statement A: Enzyme-substrate complex produced during a catalysed reaction is highly reactive.
Statement B: This complex dissociates into its product and changed enzyme with an intermediate formation of enzyme-product
complex.
1. Both statements A and B are correct
2. Both statements A and B are incorrect
3. Only statement A is correct
4. Only statement A is incorrect
Subtopic: Enzymes | Enzyme Catalysis |
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The manner in which the individual folded polypeptides or subunits are arranged with respect to each other is the architecture of a protein otherwise called the:
1. primary structure of a protein
2. secondary structure of a protein
3. tertiary structure of a protein
4. quaternary structure of a protein
Subtopic: Proteins |
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In inhibition of succinic dehydrogenase by malonate:
I. Malonate closely resembles the substrate succinate in structure.
II. The binding of malonate to succinic dehydrogenase reduces its activity but does not affect the binding of succinate.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Enzyme Inhibition |
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Assertion(A): Amino acids can be essential or non-essential.
Reason(R): Dietary proteins are the source of non-essential proteins.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Different Amino Acids |
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Assertion(A): Elemental analysis gives elemental composition of living tissues in the form of hydrogen, oxygen, chlorine, carbon etc
Reason(R): The ash generated after burning the tissue contains carbon and water.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Introduction |
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Assertion(A): The membrane fragments get separated along with the acid-insoluble pool.
Reason(R): Cell membrane and other membranes form vesicles which are not water-soluble.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Introduction |
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