Molecular Basis of Inheritance MCQ Questions & Answers in Botany

121. Satellite DNA is important because it :

A shows high degree of polymorphism in population and also the same degree of polymorphism in an individual, which is heritable from parents to children

B does not code for proteins and is same in all members of the population

C codes for enzymes needed for DNA replication

D codes for proteins needed in cell cycle

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122. Degeneration of a genetic code is attributed to the

A third member of a codon

B first member of a codon

C second member of a codon

D entire codon

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123. E.coli cells with a mutated z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because:

A the lac operon is constitutively active in these cells

B they cannot synthesize functional beta-galactosidase

C in the presence of glucose, E.coli cells do not utilize lactose

D they cannot transport lactose from the medium into the cell

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124. The Pneumococcus experiment proves that

A DNA is the genetic material

B Bacteria undergo binary fission

C Bacteria do not reproduce sexually

D RNA sometime controls the production of DNA and proteins

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125. Three codons causing chain termination are

A TAG, TAA, TGA

B GAT, AAT, AGT

C AGT, TAG, UGA

D UAG, UGA, UAA

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126. The one aspect which is not a salient feature of genetic code, is its being:

A degenerate

B ambiguous

C universal

D specific

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127. Which enzymes will be produced in a cell in which there is a nonsense mutation in the lac $$Y$$ gene?

A Lactose permease

B Transacetylase

C Lactose permease and transcetylase

D β-galactosidase

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128. Which of the following is required as inducer(s) for the expression of Lac operon?

A Glucose

B Galactose

C Lactose

D Lactose and galactose

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129. Reverse transcriptase is

A RNA dependent RNA polymerase

B DNA dependent RNA polymerase

C DNA dependent DNA polymerase

D RNA dependent DNA polymerase

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130. Transformation was discovered by:

A Meselson and Stahl

B Hershey and Chase

C Griffith

D Watson and Crick

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121. Satellite DNA is important because it :

122. Degeneration of a genetic code is attributed to the

123. E.coli cells with a mutated z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because:

124. The Pneumococcus experiment proves that

125. Three codons causing chain termination are

126. The one aspect which is not a salient feature of genetic code, is its being:

127. Which enzymes will be produced in a cell in which there is a nonsense mutation in the lac $$Y$$ gene?

128. Which of the following is required as inducer(s) for the expression of Lac operon?

129. Reverse transcriptase is

130. Transformation was discovered by:

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