Question 1

Which of the following best describes the central dogma of molecular biology?

Accepted Answer

DNA is transcribed into RNA, which is then translated into protein.

Question 2

Which of the following best differentiates genotype from phenotype?

Accepted Answer

Genotype is the genetic makeup of an organism, while phenotype is the observable characteristics.

Question 3

Which of the following is a characteristic of bacterial DNA?

Accepted Answer

It is circular and lacks introns.

Question 4

What is the primary role of short tandem repeats (STRs) in bacterial DNA?

Accepted Answer

They contribute to genetic diversity and are used in DNA fingerprinting.

Question 5

Which process describes the transfer of genes from parent to offspring?

Accepted Answer

Vertical gene transfer

Question 6

What is the main purpose of DNA replication in bacteria?

Accepted Answer

To ensure each daughter cell receives an identical copy of the genome

Question 7

Which enzyme is primarily responsible for synthesizing new DNA strands during bacterial DNA replication?

Accepted Answer

DNA polymerase

Question 8

Which of the following correctly matches an RNA type with its function?

Accepted Answer

rRNA: forms the core of the ribosome and catalyzes protein synthesis

Question 9

What is the product of transcription?

Accepted Answer

An RNA molecule

Question 10

Which of the following best describes the process of translation?

Accepted Answer

The synthesis of protein from an mRNA template

Question 11

A mutation that results in a premature stop codon is best described as which type of mutation?

Accepted Answer

Nonsense mutation

Question 12

Which of the following is considered a mutagen?

Accepted Answer

Ultraviolet light

Question 13

Which of the following best describes crossing over?

Accepted Answer

The exchange of genetic material between homologous chromosomes during meiosis

Question 14

Which statement best compares vertical and horizontal gene transfer?

Accepted Answer

Vertical gene transfer is the transfer of genes from parent to offspring, while horizontal gene transfer is the transfer of genes between unrelated organisms.

Question 15

Which of the following best describes the difference between plasmids and transposons?

Accepted Answer

Plasmids are circular DNA molecules that replicate independently, while transposons are DNA segments that can move within the genome.

Question 16

Which of the following is NOT a mechanism by which bacteria can acquire genetic variability?

Accepted Answer

Binary fission

Question 17

Which of the following best describes bacterial transformation?

Accepted Answer

Uptake of naked DNA from the environment

Question 18

Which process involves the transfer of DNA from one bacterium to another via a bacteriophage?

Accepted Answer

Transduction

Question 19

Which of the following is a type of plasmid that confers antibiotic resistance to bacteria?

Accepted Answer

Resistance plasmid

Question 20

Which of the following equations correctly represents the process of transcription?

Accepted Answer

$$DNA \xrightarrow{RNA\,polymerase} RNA$$

Microbial Genetics: Core Concepts and Mechanisms

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