How do histones acquire positive charge? from Biology Molecular

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 Multiple Choice QuestionsLong Answer Type

121.

How did Hershey and Chase established that DNA is transferred from virus to bacteria?

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 Multiple Choice QuestionsShort Answer Type

122.

Name the enzyme and state its property that is responsible for continuous and discontinuous replication of the two strands of a DNA molecule.

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123.

Why is the enzyme cellulase needed for isolating genetic material from plant cells and not from the animal cells?

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124.

Describe the structure of a RNA polynucleotide chain having four different types of nucleotides.

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125.

Draw a schematic diagram of a part of double stranded dinucleotide DNA chain having all the four nitrogenous bases and showing the correct polarity. 

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126.

It is established that RNA is the first genetic material. Explain giving three reasons.

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127.

(a) Name the enzyme responsible for the transcription of tRNA and the amino acid the initiator tRNA gets linked with.

(b) Explain the role of initiator tRNA in initiation of protein synthesis.

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 Multiple Choice QuestionsLong Answer Type

128.

State the aim and describe Messelson and Stahl experiment.

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 Multiple Choice QuestionsShort Answer Type

129. Mention the role of the codons AUG and UGA during protein synthesis.
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130.

How do histones acquire positive charge?


Histones are rich in the basic amino acid residues lysines and arginines both of which carry positive charges in their side chains. The presence of these positive amino acids histone acquires positive charge.
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