Which of the following is true for both transcription and DNA replication?

Q. “Both the strands of DNA are not copied during transcription”.
Choose the correct reasons from the following.

A. If both strands of DNA act as a template, RNA would be coded with different sequences, leading to formation of two different polypeptide chains from the same segment of DNA.

B. If both strands of DNA act as a template, RNA would be coded with different sequences, leading to formation of the same polypeptide chains from the same segment of DNA.

C. If both strands of DNA act as a template for transcription, it simplifies the genetic information transfer machinery.

D. If both strands of DNA act as a template for transcription, it complicates the genetic information transfer machinery.

E. If both strands of DNA act as a template for transcription, dsRNA would be formed which would prevent protein formation.

Q. The base sequence on one of the strands of DNA is TAC TAG GAT.
(i) Give the base sequence of its complementary strand.
(ii) What is the distance maintained between the two consecutive paired bases in the DNA molecule?
(iii) Who contributed the base complementarity rule?
(iv) Categorise these bases using their full names.
(v) What holds these base pairs together?

Q. Only template strand of DNA participates in the transcription process. What will happen if both the strands transcribes simultaneously? Explain the transcription process.

Q. 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.