During transcription RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure. What is it’s DNA-binding sequence?

(1) TTAA

(2) AATT

(3) CACC

(4) TATA

Subtopic:  Transcription: IV | Transcription |
 76%
NEET - 2007
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Differentiation of organs and tissues in a developing organism, is associated with:

(1) developmental mutations

(2) differential expression of genes

(3) lethal mutations

(4) deletion of gens

Subtopic:  Gene Regulation in Eukaryotes |
 83%
From NCERT
NEET - 2007
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The Okazaki fragments in DNA chain growth:

(1) result in transcription

(2) polymerize in the 3’-to-5’ direction and forms replication fork

(3) prove semi-conservative nature of DNA replication

(4) polymerize in the 5’-to-3’ direction and explain 3’-to-5’ DNA replication

Subtopic:  DNA Replication:III | DNA Replication |
 61%
NEET - 2007
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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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