Which of the following statements fall appropriately under replication of DNA and transcription of mRNA?
A. Entire genomic DNA is copied.
B. Both the strands of DNA are copied.
C. DNA dependent DNA polymerase is used.
D. Nitrogenous bases adenine, uracil, guanine and cytosine take part in forming the polynucleotide chain.

Q. Two stretches of DNA, A and B are taken for a polymerase chain reaction. If DNA-A has more guanine-cytosine bases than adenine-thymine and DNA-B has more adenine-thymine bases than guanine-cytosine bases, which of the following statements is true regarding PCR of these two stretches of DNA?

Q.

Statement 1: There are four kinds of nitrogen bases in DNA.

Statement 2: They are adenine, uracil, guanine and cytosine.

Q. How many of the following statements are correct ?

A. DNA dependent DNA polymerase requires DNA primer for initiating replication but DNA dependent RNA polymerase does not require any primer for transcription.

B. DNA dependent DNA polymerase requires RNA primer for initiating replication but DNA dependent RNA polymerase does not require any primer for transcription.

C. During replication, unwinding of DNA double helix forms a fork-like structure called replication fork.

D. During transcription, unwinding of the DNA double helix by DNA dependent RNA polymerase forms a transcription bubble.

E. During transcription, unwinding of DNA double helix by DNA dependent RNA polymerase forms a transcription fork.

Q.

Statement 1: The four nitrogen bases in a DNA molecule are guanine, thymine adenine, cytosine.

Statement 2: Where adenine and thymine are purines and guanine and cytosine are pyrimidines.

Q. Nitrogenous base present in DNA are
(a) Thymine
(b) Cytosine
(c) Adenine
(d) Guanine