Question 1

Which of the following best describes a genotype?

Accepted Answer

The genetic makeup of an organism, represented by its DNA sequence.

Question 2

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

Accepted Answer

Prokaryotic chromosomes are typically single and circular, while eukaryotic chromosomes are multiple and linear.

Question 3

Which enzyme is responsible for adding nucleotides during DNA replication?

Accepted Answer

DNA polymerase

Question 4

During DNA replication, which enzyme is responsible for unwinding the DNA double helix?

Accepted Answer

Helicase

Question 5

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

Accepted Answer

$$DNA \rightarrow RNA \rightarrow Protein$$

Question 6

Which type of RNA carries amino acids to the ribosome during translation?

Accepted Answer

tRNA

Question 7

Where does transcription occur in eukaryotic cells?

Accepted Answer

In the nucleus

Question 8

Which of the following statements about mutations is correct?

Accepted Answer

Mutations can be beneficial, neutral, or harmful depending on the context.

Question 9

Which process describes the synthesis of an RNA molecule from a DNA template?

Accepted Answer

Transcription

Question 10

Which of the following best describes the function of DNA ligase during DNA replication?

Accepted Answer

It joins Okazaki fragments on the lagging strand.

Question 11

A mutation changes a codon from $$UAC to$$ $$UAA. $$What type of mutation is this?

Accepted Answer

Nonsense mutation

Question 12

Which of the following is NOT a function of mRNA?

Accepted Answer

Carrying amino acids to the ribosome.

Question 13

Which of the following best explains why mutations in somatic cells are not inherited?

Accepted Answer

Somatic cells are not involved in reproduction.

Question 14

Which enzyme synthesizes short RNA primers during DNA replication?

Accepted Answer

Primase

Question 15

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.

Question 16

Which of the following best describes the role of rRNA in the cell?

Accepted Answer

It forms the core structure of the ribosome and catalyzes peptide bond formation.

Question 17

Which process is responsible for the conversion of mRNA into a polypeptide chain?

Accepted Answer

Translation

Question 18

Which of the following statements about gene expression is correct?

Accepted Answer

Gene expression is the process by which information from a gene is used to synthesize a functional gene product.

Question 19

Which of the following best describes a frameshift mutation?

Accepted Answer

A mutation caused by the insertion or deletion of nucleotides that changes the reading frame.

Question 20

Which of the following is a function of reverse transcriptase?

Accepted Answer

Synthesizing DNA from an RNA template.

Chapter 5 Genetics Study Guide: Microbiology

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