The beginning of understanding genetic transformation in bacteria was made by

(1) Frederick Griffith

(2) Hershey and Chase

(3) Watson and Crick

(4) TH Morgan

Subtopic:  Search for Genetic Material:I | Search for Genetic Material |
 88%
From NCERT
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If the total amount of adenine and thymine in a double-stranded DNA is 45%, the amount of guanine in this DNA will be

(1) 22.5%

(2) 27.5%

(3) 45%

(4) 55%

Subtopic:  The DNA |
 68%
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AUG codes for

(1) valine

(2) histidine

(3) phenylalanine

(4) methionine

Subtopic:  Genetic Code: III | Genetic Code |
 91%
From NCERT
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In the lac operon model, lactose molecules function as:-

(1) inducers, which bind with the operator
gne

(2) repressors, which bind with the operator
gene

(3) inducers, which bind with the repressor
protein

(4) corepressors, which bind with repressors
protein

Subtopic:  Gene Regulation: Lac Operon |
 72%
From NCERT
AIIMS - 2012
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A recessive mutant is one which is

(1) not expressed

(2) rarely expressed

(3) expressed only in homozygous and hemizygous state

(4) expressed only in heterozygous state

 70%
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If the total amount of adenine and thymine in a double-stranded DNA is 60%, the amount of guanine in this DNA will be

(1) 15%

(2) 20%

(3) 30%

(4) 40%

Subtopic:  The DNA |
 81%
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If T = 40%, C = 10% then G = ? in a pollen cell

(1) 40%

(2) 10%

(3) 91%

(4) 20%

Subtopic:  The DNA |
 92%
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Translocase is an enzyme required for

(1) DNA replication

(2) RNA synthesis

(3) initiation of protein synthesis

(4) protein synthesis chain elongation

Subtopic:  Translation Mechanism |
 60%
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Centre of DNA Fingerprinting and Diagnostics (CDFD) is located at

(1) Delhi

(2) Chennai

(3) Kolkata

(4) Hyderabad

Subtopic:  DNA Fingerprinting |
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In a bacterium, the amount of adenine was found to be 18 per cent. Suggest the cytosine base composition from the following

(1) 64%

(2) 36%

(3) 32%

(4) 18%

Subtopic:  The DNA |
 87%
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