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प्रश्न
What background information did Watson and Crick had available with them for developing a model of DNA? What was their own contribution?
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उत्तर
Wastson and Crick had the following informations which helped them to develop a model of DNA.
- Chargaffs’ Law suggesting A = T, and C = G.
- Wilkins and Rosalind Franklin’s work on DNA crystal’s X-ray diffraction studies about DNA’s physical structure.
- Watson and crick proposed
- How complementary bases may pair
- Semi-conservative replication and
- Mutation through tautomerism
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संबंधित प्रश्न
Explain the semi-conservative replication of eukaryotic DNA.
Which enzyme does remove supercoils from replicating DNA?
During DNA replication, the separated strands of DNA are prevented from recoiling by
A DNA segment has 75 cytosine and 40 thymine nucleotides. What shall be the total number of phosphates in the DNA segment?
Describe the process of semiconservative replication of DNA with the help of a neat and labelled diagram.
E. coli cell grown on 15N medium are transferred to 14N medium and allowed to grow for two generations. DNA extracted from these cells is ultracentrifuged in a cesium chloride density gradient. What density distribution of DNA would you expect in this experiment?
What is the basis for the difference in the synthesis of the leading and lagging strand of DNA molecules?
Which of the following statements is not true about DNA replication in eukaryotes?
Meselson and Stahl’s experiment proved ____________.
Identify the direction of DNA replication in eukaryotes.
Complementary strands of DNA molecule are (i) and bound by (ii).
In which direction polymerization of DNA nucleotides occurs during the synthesis of lagging strand?
Assertion (A): DNA replication is said to be semi-conservative.
Reason (R): After DNA replication, each daughter molecule has one old and one new strand.
Which of the following term correctly describes the movement of ribosome on the mRNA?
In DNA molecule, pairing between two complementary nucleotides takes place by ________ bonds.
Extension of the plasma membrane in a prokaryotic cell is ______.
Match the following column.
| Column - I | Column - II |
| (A) DNA structure | 1. Muller and stadder |
| (B) Semiconservative replication of DNA | 2. Beadle and partum |
| (C) One gene-one enzyme theory | 3. Watson and crick |
| (D) Induction of mutation | 4. Massillon and stahl |
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