QUIZ 10

The duplication process of DNA is called

• replication.

• transcription.

• translation.

• nucleation.

The process by which an mRNA base sequence directs the amino acid sequence of a protein is called

• replication.

• transcription.

• translation.

• nucleation.

Which of the following is NOT an observed event in the flow of genetic information?

• RNA --> DNA

• DNA --> RNA

• RNA --> RNA

• Protein—>RNA

• RNA --> Protein

In the original Central Dogma of biology, the ordinary flow of genetic information is:

• DNA → RNA → Protein

• RNA → DNA → Protein

• Protein → RNA → DNA

• DNA → Protein → RNA.

• None of these

The famous Meselson and Stahl experiment showed:

• DNA is replicated by a semi-conservative mechanism.

• The direction of DNA synthesis proceeds 5' → 3'.

• The isotope 15N is denser than 14N.

• DNA replication is semi-conservative and 15N is denser than 14N.

• All of these are correct.

All the following describe the general mechanism of DNA synthesis, except:

• From the perspective of the DNA template strands, one strand is made 5' → 3' while the other strand is made 3' → 5'.

• The strands become separated during synthesis.

• Synthesis occurs in both directions from the starting site of synthesis.

• Synthesis of DNA is a very accurate process.

• All of these are correct.

How do origins of replication differ in eukaryotes and prokaryotes?

• Eukaryotes have several origins, while prokaryotes typically have one.

• Prokaryotes have several origins, while eukaryotes typically have one.

• Only prokaryotes have origins of replication.

• None of these.

DNA is synthesized from the 3’ end to the 5’ end in which of the following processes?

• Replication of DNA

• Replication of RNA

• Transcription of RNA from DNA

• none of these

Which of the following best describes the process of DNA replication in a prokaryote?

• Replication begins at a unique site and proceeds in one direction all the way around a typically circular chromosome.

• Replication begins at a unique site and proceeds in two directions, meeting about halfway around a typically circular chromosome.

• Replication begins at multiple sites, spreading outward until the entire typically circular chromosome is replicated.

• Replication begins at multiple sites, spreading outward until the entire typically linear chromosome is replicated.

Which of the following is not a function of DNA Polymerase III?

• Polymerization.

• Ligating the final products.

• Proofreading.

• Clamping on to the template.

• None of these are functions of DNA Polymerase III