Structure of DNA
Single stranded DNA and RNA’s, usually:
Obey Chargaff’s rule
Do not obey Chargaff’s rule
Obey conservative model
Obey all rules and regulation
Do not obey Chargaff’s rule
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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
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
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