Structure of DNA
‘DNA’ is:
Left-handed double helix
Right-handed double helix
Circular
Double stranded
Right-handed double helix
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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
Distance between two neighbouring base pairs is, approximately:
A. 3.4ร
B. 2.4ร
C. 4.4ร
D. 4.9ร
Double helical structure of DNA was coined by:
A. James Watson
B. Francis Crick
C. Watson and Crick
D. Kuhne
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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