Molecular Basis of Inheritance
Why was purine-purine bonding theory not consistent with X-Ray diffraction data?
it was too wide
it was too narrow
purines cannot bond together
it would tilt sideways
it was too wide
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In which of following direction a new DNA molecule is elongated by polymerase?A. 5 to 3 end
B. 3 to 5 end
C. no direction
D. along the template strand
Which of following forms chromatin takes when cell enters metaphase stage?
A. diffused mass
B. looped domains
C. coiled
D. supercoiled
DNA helix makes one full turn after what distance along its length?
A. 10 nm
B. 5 nm
C. 3.4 nm
D. 1 nm
What is rate of elongation of DNA in humans?
A. 1 per second
B. 10 per second
C. 50 per second
D. 100 per second
Segments of DNA synthesized along lagging strand are called:
A. replication fragment
B. okazaki fragments
C. lagging fragments
D. leading fragments
In which of following secondary structures DNA molecule is folded?
A. alpha helix
B. beta sheets
C. random coil
D. hairpin loops
A defect in DNA repair enzymes is one of causative factors of
A. alzheimer’s disease
B. parkinson’s disease
C. cancer
D. polio
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