Unit 19: Chromosome and DNA — Mcqs

12th Class Biology · Unit 19: Chromosome and DNA

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MCQ16.Which of the following looks like beads on a string?

MCQ17.The most convincing proof that DNA is the genetic material was provided by;

MCQ18.Degeneracy of genetic code means that;

MCQ19.How many codons are needed to specify for five amino acids?

MCQ20.Which of the following is NOT involved in the initiation of replication?

MCQ21.Why DNA polymerase synthesises the leading and lagging strands of DNA in different manners?

MCQ22.Synthesis of a new DNA strand usually begins with:

MCQ23.The elongation of the leading strand during DNA synthesis;

MCQ24.Which of the following enzymes remove supercoiling in replicating DNA ahead of the replication fork?

MCQ25.Which enzyme joins the bits of DNA?

MCQ26.Which of these subunits of RNA polymerase is required to initiate transcription?

MCQ27.When and where does the splicing of mRNA occur?

MCQ28.What happens in mRNA splicing?

MCQ29.Which of these happens first during protein synthesis?

MCQ30.The synthesis of protein chains is initiated with the amino acid;

MCQ31.The main function of tRNA is to:

MCQ32.Ultraviolet radiation can cause mutations by;

MCQ33.Phenylketonuria is a genetic disorder with a defect in the metabolism of:

MCQ34.The condition sickle cell anaemia is due to;