Question 1

Which of the following best describes the main difference between prokaryotic and eukaryotic genomes?

Accepted Answer

Eukaryotic genomes contain much more noncoding DNA and have lower gene density than prokaryotic genomes.

Question 2

What is the function of reverse transcriptase in retrotransposons?

Accepted Answer

It synthesizes DNA from RNA.

Question 3

During shotgun sequencing, which step is no longer necessary due to advances in next-generation sequencing (NGS)?

Accepted Answer

Cloning fragments into plasmids or vectors.

Question 4

Which of the following is a consequence of transposable element activity in eukaryotic genomes?

Accepted Answer

Frequent chromosomal rearrangements due to ectopic recombination.

Question 5

A plant species with a genome composed of four complete sets of chromosomes is best described as:

Accepted Answer

Tetraploid

Question 6

Which equation correctly represents the number of nucleotides in a gigabase (Gb)?

Accepted Answer

$$1 	imes 10^9$

Question 7

Which of the following statements about the human genome is correct?

Accepted Answer

Noncoding DNA makes up the majority of the human genome.

Question 8

What is the C-value paradox?

Accepted Answer

The observation that genome size does not correlate with organism complexity.

Question 9

Which process can result in the formation of a new polyploid species through hybridization and chromosome doubling?

Accepted Answer

Allopolyploidy

Question 10

Which of the following is a real-world example of chromosome fusion in human evolution?

Accepted Answer

Fusion of two acrocentric chromosomes to form human chromosome 2.

Question 11

Which of the following is true about gene families?

Accepted Answer

Gene families can arise through gene duplication followed by divergence.

Question 12

Which of the following is a plausible effect of unequal crossing over during meiosis?

Accepted Answer

Duplication and deletion of genes on homologous chromosomes.

Question 13

Which of the following best describes satellite DNA?

Accepted Answer

Short, tandemly repeated sequences found in eukaryotic genomes.

Question 14

Which of the following is a function of bioinformatics in genomics?

Accepted Answer

Managing and analyzing large biological datasets using computational tools.

Question 15

Which of the following is a characteristic of transposons?

Accepted Answer

They can move to new locations within the genome and often cause mutations.

Question 16

Which of the following is a plausible reason why polyploidy is more common in plants than in animals?

Accepted Answer

Plants can reproduce asexually and self-pollinate, allowing polyploid lineages to persist.

Question 17

Which of the following equations correctly represents the DNA content of a haploid genome (C-value) for Takifugu rubripes?

Accepted Answer

$$C = 400 	ext{ Mb}$$

Question 18

Which of the following is a direct result of chromosome fission?

Accepted Answer

A chromosome is broken into two or more parts.

Question 19

Which of the following statements about the evolution of eukaryotic genomes is supported by comparative genomics?

Accepted Answer

Chromosomal mutations such as fusions, fissions, and translocations have contributed to genome diversity.

Genomes and Their Evolution: Structure, Function, and Diversity

Study Guide - Practice Questions