Q. In early 1950s high quality X-ray diffraction photographs of DNA suggesting the DNA being double helix and composed of two nucleotide strands. Who took those photographs?

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Q. In 1952, an unambiguous established work in the laboratory of Alexander Todd led to the discovery of _____________

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Q. What should be the complementary strand of 3’….ATGGCTTGA….5’?

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Q. The hydrogen bonds formed during A and T bonding occurs between C₆NH₂ of A and __________

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Q. In a DNA double helix the bases are held together by hydrogen bonds. These hydrogen bonds are _________

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Q. It is easy to break the bond between A and T than in between G and C.

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Q. With respect to the importance of hydrogen bonding and DNA double helix stability, which of the following statements is false?

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Q. In the late 1970s non double helical form of DNA was also suggested but was discarded on the basis of certain factors. Which of the following is not a factor responsible?

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Q. Levene investigated and found that the nucleic acid is composed of poly-nucleotides and each nucleotide is composed of one base, a sugar molecule and a phosphate. This was performed on the genome of________________

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Q. Who were the first to suggest that one strand of DNA might act as a template for the synthesis of its complementary strand?

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Q. Semiconservative nature of replication of eukaryotic chromosome was first demonstrated by _______

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Q. Watson and Crick’s suggestion of the complementary strand synthesis taking one of the parent strand as template was proposed in _________

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Q. Which of the following statements is true with respect to the DNA double helix?

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Q. Who, in which year showed firm enzymological proof that DNA alone functions as the template for the synthesis of new DNA strands?

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Q. Replication of DNA ends are carried out by polymerase.

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Q. Which of the following regarding the basic mechanism of gene expression is correct?

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Q. Which of the following does not take part in gene expression?

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Q. Multiple copies of RNA could be formed at the same time.

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Q. Amino acids prior to their incorporation into polypeptide must be attached to a special adaptor molecule. Who proved this and when?

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Q. With respect to polymerization of amino acids which of the following statements is wrong?

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