The two polynucleotide chains in DNA are:

(1) parallel

(2) discontinuous

(3) antiparallel

(4) semiconservative

Subtopic:  DNA Double Helix |
 92%
From NCERT
NEET - 2007
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One gene-one enzyme relationship was established for the first time in:

(1) Neurospora crassa

(2) Salmonella typhimurium

(3) Escherichia coli

(4) Diplococcus pneumoniae

Subtopic:  Transcription: I | Transcription |
NEET - 2007
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A sequential expression of a set of human genes occurs when a steroid molecule binds to the:

1. transfer RNA

2. messenger RNA

3. DNA sequence

4. ribosome

Subtopic:  Transcription: IV | Transcription |
NEET - 2007
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Which antibiotic inhibits interaction between t-RNA and m-RNA during bacterial protein synthesis?

(1) Erythromycin

(2) Penicillin

(3) Streptomycin

(4) Tetracycline

Subtopic:  Translation |
NEET - 2006
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Amino acid sequence, in protein synthesis is decided by the sequence of

(1) t-RNA

(2) m-RNA

(3) c-DNA

(4) r-RNA

Subtopic:  Translation |
 75%
From NCERT
NEET - 2006
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One gene-one enzyme hypothesis was postulated by:

1. R. Franklin

2. Hershey and Chase

3. A. Garrod 

4. Beadle and Tatum

Subtopic:  Transcription: I | Transcription |
 67%
NEET - 2006
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One turn of the helix in a B-form DNA is approximately:

(1) 20 nm

(2) 0.34 nm

(3) 3.4 nm

(4) 2 nm

Subtopic:  DNA Double Helix |
 73%
From NCERT
NEET - 2006
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Antiparallel strands of a DNA molecule means that:

(1) one strand turns anti-clockwise

(2) the phosphate groups of two DNA strands, at their ends, share the same position

(3) the phosphate groups at the start of two DNA strands are in opposite position (pole)

(4) one strand turns clockwise

Subtopic:  DNA Double Helix |
 84%
From NCERT
NEET - 2006
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Complete genomic sequence of the following plant has been recently announced is

(1) Arabidopsis thaliana

(2) Tritium vulgare

(3) Cucurbita pepo

(4) Pisum sativum

Subtopic:  Human Genome Project |
 64%
From NCERT
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Okazaki fragments are proportions of DNA

(1) synthesized on the leading strand of DNA replication fork

(2) synthesized on the lagging strand of DNA replication fork

(3) produced during the digestion of DNA by restriction endonucleases

(4) none of the above

Subtopic:  DNA Replication:III | DNA Replication |
 90%
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