DNA AND RNA (Search for genetic material and DNA as genetic material; Structure of DNA and RNA; DNA packaging; DNA replication; Central dogma; Transcription...) NEET Questions

Biology - Genetics and Evolution

DNA AND RNA (Search for genetic material and DNA as genetic material; Structure of DNA and RNA; DNA packaging; DNA replication; Central dogma; Transcription...) MCQ Questions


13.
How many hydrogen bonds are present between adenine and thymine?
A.
Four
B.
One
C.
Two
D.
Three
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ANSWER :
C. Two
14.
The pitch of the DNA helix according to Watson-Crick model is:
A.
20 nm
B.
3.4 nm
C.
34 nm
D.
0.34 nm
😑 View Answer Rough Work Error
ANSWER :
B. 3.4 nm
15.
How many base pairs are present in one complete turn of B-DNA?
A.
20 bp
B.
100 bp
C.
34 bp
D.
10 bp
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ANSWER :
D. 10 bp
16.
Chargaff's rule states that in DNA:
A.
A+G = C+T
B.
A=G and C=T
C.
A=C and G=T
D.
A=T and G=C
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ANSWER :
D. A=T and G=C
17.
The X-ray diffraction data crucial for elucidating DNA structure was provided by:
A.
Hershey and Chase
B.
Watson and Crick
C.
Avery and MacLeod
D.
Maurice Wilkins and Rosalind Franklin
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ANSWER :
D. Maurice Wilkins and Rosalind Franklin
18.
A nucleotide consists of:
A.
Base + phosphate
B.
Sugar + base
C.
Sugar + phosphate
D.
Sugar + base + phosphate
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ANSWER :
D. Sugar + base + phosphate