Which model explains the double helix nature of DNA
(1)Watson and Crick Model
(2)Gene Battery Model
(3)Sanger Sequencing
(4)Both A and C
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the DNA molecule
1. The total amount of purine nucleotides and pyrimidine nucleotides is not always equal
2. There are two strands which run parallel in 5'3' direction
3. The proportion of adenine in relation to thymine varies with the organism
4. There are two strands which run antiparallel one in 5'3' direction and other in 3'5' direction
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following is the diagrammatic representation of a nucleotide?
(a) (b) (c) (d)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe number of cyclic rings present in purines and pyrimidines are
(1)2,1 respectively
(2)1,2 respectively
(3)2,2 respectively
(4)1,1 respectively
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAntiparallel strands of a DNA molecule means that
1. The phosphate groups of two DNA strands, at their ends, share the same position
2. The phosphate groups at the start of two DNA strands are in opposite position (pole)
3. One strand turns clockwise
4. One strand turns anti-clockwise
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched
with the category mentioned against it?
1. Thymine, Uracil - Pyrimidines
2. Uracil, Cytosine - Pyrimidines
3. Guanine, Adenine - Purines
4. Adenine, Thymine - Purines
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyBoth the strands of the DNA are joined by
(1)Disulphide bond
(2)hydrogen bonds
(3)Glycosidic bonds
(4)phosphodiester bonds
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe above diagram represent the nitrogenous bases. Identify the correct combination:
(1) A = Adenine; B = Thymine
(2) A = Guanine; B = Thymine
(3) A = Adenine; B = Uracil
(4) A = Guanine; B = Uracil
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is incorrect.
1.Nucleotides- Nucleosides = phosphate
2.Nucleosides + Phosphate = Nucleotides
3.Nucleosides – Nucleotides = Phosphate
4.Both 1 and 2
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven below is the diagrammatic representation of one of the categories of small
molecular weight organic compounds in the living tissues. Identify the category shown
and the one blank component X in it
Category Component
1. Cholesterol Guanin
2. Amino acid NH2
3. Nucleotide Adenine
4. Nucleoside Uracil
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology