Structure of DNA
Double helical structure of DNA was coined by:
James Watson
Francis Crick
Watson and Crick
Kuhne
Watson and Crick
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In DNA, each turn of helix is nearly:A. 3.3 nm
B. 4.4 nm
C. 3.4 nm
D. 2.5nm
Two ‘polynucleotides’ are not identical, but:
A. Complementary to each other due to phosphate
B. Complementary to each other due to base pairs
C. Complementary to each other due to hydrogen bonding
D. Complementary to each other due to carbon cycle
Double ‘helical’ structure of DNA was identified in:
A. 1987
B. 1954
C. 1953
D. 1955
‘DNA’ is:
A. Left-handed double helix
B. Right-handed double helix
C. Circular
D. Double stranded
Distance between two neighbouring base pairs is, approximately:
A. 3.4ร
B. 2.4ร
C. 4.4ร
D. 4.9ร
Strand on which genetic information reside is called:
A. Antisense strand
B. Template strand
C. Sibling strand
D. Genotypes
Number of hydrogen bonds in adenine and thymine is:
A. 2
B. 4
C. 3
D. 6
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