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41. Write differences between Prokaryotic DNA and Eukaryotic DNA.

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42.

Differentiate between the followings:
(a) Repetitive DNA and Satellite DNA
(b) mRNA and tRNA
(c) Template strand and Coding strand

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43. Which property of DNA double helix led Watson and Crick to hypothesize semi-conservative mode of DNA replication ? Explain.

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Differences between a leading strand and a lagging strand

Leading Strand

Lagging Strand

1. The replication on this strand is continuous.

2. DNA ligase is not required

3. It is synthesized in the 5’ → 3’ direction.

1. The replication on this strand is discontinuous in the
form of short Okazaki fragments.

2. DNA ligase enzyme is required for joining Okazaki fragments.

3. In Okazaki fragments direction is 5’ → 3’ but overall direction is 3’ → 5’.

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45.

Sketch and explain clover leaf model of tRNA.

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46. Who developed DNA fingerprinting technique.

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47. Write a note on repair replication.

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48.

Write a note on messenger RNA.

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49. What is the role of m-RNA, t-RNA and rRNA in protein synthesis ?

Why all the three RNAs are needed to synthesise a protein in a cell ?

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50. RNA was first genetic material, DNA evolved later on. Explain.

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