Question 1

Which of the following best describes a genome?

Accepted Answer

The entire genetic complement of an organism, including its genes and nucleotide sequences

Question 2

Which statement about prokaryotic chromosomes is correct?

Accepted Answer

They are typically circular molecules of DNA located in the nucleoid

Question 3

Which type of plasmid is responsible for transferring antibiotic resistance between bacteria?

Accepted Answer

Resistance plasmid

Question 4

Which of the following is a key difference between eukaryotic and prokaryotic genomes?

Accepted Answer

Eukaryotic chromosomes are linear and sequestered within the nucleus

Question 5

According to the semiconservative model of DNA replication, what is the composition of the DNA molecules after one round of replication?

Accepted Answer

Each DNA molecule consists of one original strand and one new strand

Question 6

During bacterial DNA replication, which enzyme is responsible for removing supercoils in DNA?

Accepted Answer

Gyrase

Question 7

Which of the following best describes the difference in Okazaki fragments between eukaryotic and prokaryotic DNA replication?

Accepted Answer

Eukaryotic Okazaki fragments are shorter than prokaryotic ones

Question 8

Which process is described by the central dogma of genetics?

Accepted Answer

DNA is transcribed to RNA, which is then translated to form polypeptides

Question 9

Which of the following is NOT a type of RNA transcribed from DNA?

Accepted Answer

Deoxyribosomal RNA (drRNA)

Question 10

In prokaryotes, what is the function of the operator in an operon?

Accepted Answer

It acts as an on/off switch for transcription

Question 11

Which of the following scenarios best illustrates an inducible operon?

Accepted Answer

The lac operon is activated in the presence of lactose

Question 12

A mutation that results in the insertion of a single nucleotide into a gene will most likely cause which type of mutation?

Accepted Answer

Frameshift mutation

Question 13

Which of the following is a likely consequence of a frameshift mutation?

Accepted Answer

A major change in the amino acid sequence after the mutation site

Question 14

Which of the following mutagens is most likely to cause thymine dimers in DNA?

Accepted Answer

Ultraviolet light

Question 15

Which of the following best describes generalized transduction?

Accepted Answer

A transducing phage carries random DNA segments from donor to recipient

Question 16

During bacterial conjugation, what is the role of the pilus?

Accepted Answer

It attaches the donor cell to the recipient cell and facilitates DNA transfer

Question 17

Which of the following statements about gene expression regulation is correct?

Accepted Answer

Regulation of protein synthesis typically halts transcription

Question 18

A scientist exposes bacteria to a chemical that acts as a nucleotide analog. What is the most likely result?

Accepted Answer

Disruption of DNA and RNA replication

Question 19

Which of the following best explains why most mutations are considered deleterious?

Accepted Answer

They rarely lead to a protein that improves the organism's ability to survive

Question 20

Which of the following is a real-world example of horizontal gene transfer in bacteria?

Accepted Answer

A bacterium acquiring antibiotic resistance genes from another bacterium via conjugation

The Structure and Replication of Genomes: Microbial Genetics and Gene Function

Study Guide - Practice Questions