Question 1

Which of the following best describes the difference between genotype and phenotype?

Accepted Answer

Genotype is the set of alleles present in an organism, while phenotype is the physical expression of those alleles.

Question 2

Which of the following statements correctly compares the genomes of prokaryotes and eukaryotes?

Accepted Answer

Prokaryotic genomes are usually smaller, circular, and lack a nuclear membrane, while eukaryotic genomes are larger, linear, and enclosed within a nucleus.

Question 3

Which of the following best describes the flow of genetic information in a cell, according to the central dogma?

Accepted Answer

$$DNA \rightarrow RNA \rightarrow Protein$$

Question 4

Which of the following is NOT a function of RNA in the cell?

Accepted Answer

Storing genetic information long-term

Question 5

During which stage of protein synthesis does peptide bond formation occur?

Accepted Answer

Translation

Question 6

Which of the following best describes a codon?

Accepted Answer

A sequence of three nucleotides in mRNA that codes for a specific amino acid

Question 7

Which of the following is an example of a post-translational modification?

Accepted Answer

Phosphorylation of a protein after translation

Question 8

Which process is responsible for the removal of introns from pre-mRNA in eukaryotic cells?

Accepted Answer

Splicing

Question 9

Which of the following best explains why the genetic code is considered redundant?

Accepted Answer

Multiple codons can code for the same amino acid

Question 10

Which of the following is an example of a spontaneous mutation?

Accepted Answer

A mutation resulting from a DNA polymerase error during replication

Question 11

Which of the following mechanisms is NOT a method of horizontal gene transfer in bacteria?

Accepted Answer

Binary fission

Question 12

Which of the following best describes generalized transduction?

Accepted Answer

Transfer of any bacterial gene by a bacteriophage during the lytic cycle

Question 13

Which of the following is a key difference between vertical and horizontal gene transfer?

Accepted Answer

Vertical gene transfer is the transmission of genetic material from parent to offspring, while horizontal gene transfer is the movement of genetic material between unrelated organisms.

Question 14

Which of the following best describes the function of the Ames test?

Accepted Answer

To detect the mutagenic potential of chemical compounds

Question 15

Which of the following is an example of an induced mutation?

Accepted Answer

A mutation caused by exposure to a chemical mutagen

Question 16

Which of the following best describes a transposon?

Accepted Answer

A segment of DNA that can move from one location to another within the genome

Question 17

Which of the following is a direct result of genetic recombination?

Accepted Answer

Increased genetic diversity in a population

Question 18

A scientist wants to demonstrate genetic transformation in bacteria. Which of the following would be the best experimental approach?

Accepted Answer

Mix competent bacteria with plasmid DNA containing a selectable marker and plate on selective media

Question 19

Which of the following best explains how transposons contribute to genetic diversity?

Accepted Answer

By moving genes to new locations, potentially disrupting or activating genes

Question 20

Which of the following is a key feature of conjugation in bacteria?

Accepted Answer

Transfer of DNA via a pilus from a donor to a recipient cell

Genetics and Molecular Biology: Key Concepts and Mechanisms

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