Consider the following statements regarding the transformation experiment.

A. It was performed by F. Griffith on Streptococcus pneumoniae.
B. It proved that DNA is the genetic material.
C. Avery, MacLeod, and McCarty worked to determine the biochemical nature of transforming principle.
D. DNase inhibits the transformation.

The correct statement is/are :

In eukaryotes, the regulation of gene expression occurs at the level of :

A. Transcription level.

B. Processing level.

C. Transport of ribosomal subunits from the nucleus to the cytoplasm.

D. Translation level.

Read the given statements with respect to DNA replication.

A. DNA – dependent DNA polymerase catalyses the polymerization in only one direction that is 5' – 3'.

B. In eukaryotes, the replication of DNA takes place at the M phase of the cell cycle.

C. The discontinuously synthesised fragments are later joined by the enzyme ligase.

D. Deoxyribonucleoside triphosphate serves dual purpose. In addition to acting as substrates, they provide energy for polymerization reaction during DNA replication.

How many statements are correct?

If a hybrid DNA molecule is allowed to replicate twice in the culture medium containing N¹⁵, the percentage of hybrid DNA will be:

What would happen if a gene encoding a polypeptide of 50 amino acids undergoes nonsense mutation at the 25th codon, i.e., UAC into UAA?