Q. With respect to nucleosides which of the following is paired correctly?

View solution

Q. Which of the following is not a component of the nucleic acid backbone?

View solution

Q. According to Chargaff’s rule the two strands of DNA has ___________

View solution

Q. In one strand of a double stranded DNA the rate of occurrence of A is 3 times C in consecutive 10 bases. So how many G will be there in 100 base pairs of a DNA duplex?[Consider G=T in one strand].

View solution

Q. In a diploid organism with 30,000 bases haploid genome contains 23% A residues. What is the number of G residues in the genome of this organism?

View solution

Q. Which of the following is not a characteristic of nucleotide bases?

View solution

Q. Which of the following factors do not provide to the separation of DNA fragments during electrophoresis?

View solution

Q. Which one of the following is not a function of a nucleotide?

View solution

Q. The first X-ray diffraction patterns of DNA were taken in 1938 by ___________

View solution

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?

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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?

View solution

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________________

View solution

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

View solution

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

View solution