Question 1

Which of the following best describes the difference in genome organization between prokaryotes and eukaryotes?

Accepted Answer

Prokaryotes have a single circular chromosome, while eukaryotes have multiple linear chromosomes.

Question 2

What is the primary function of nucleosomes in eukaryotic cells?

Accepted Answer

To package and compact DNA within the nucleus.

Question 3

Which statement about bacterial DNA packaging is correct?

Accepted Answer

Bacterial DNA is compacted primarily by negative supercoiling.

Question 4

A nucleosome core particle consists of how many base pairs of DNA wrapped around a histone octamer?

Accepted Answer

$146$ bp

Question 5

Which of the following is NOT a component of the nucleosome histone octamer?

Accepted Answer

H1

Question 6

What is the role of telomeres in eukaryotic chromosomes?

Accepted Answer

They protect chromosome ends from degradation and ensure complete replication.

Question 7

Which technique is used to identify the location of a gene on a chromosome using a fluorescent dye?

Accepted Answer

Fluorescent In Situ Hybridization (FISH)

Question 8

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

Accepted Answer

Any two humans differ in their DNA at 1 bp per 1000 bp.

Question 9

What is the main application of PCR in forensic science?

Accepted Answer

To amplify small amounts of DNA from biological samples.

Question 10

Which of the following is a property of euchromatin?

Accepted Answer

It is transcriptionally active.

Question 11

During interphase, chromatin can exist in two major forms. Which form is thicker and transcriptionally inactive?

Accepted Answer

Heterochromatin

Question 12

Which of the following is required for a successful PCR reaction?

Accepted Answer

A thermostable DNA polymerase, primers, dNTPs, and a DNA template

Question 13

Which process was crucial for sequencing the human genome and involves assembling overlapping DNA fragments?

Accepted Answer

Shotgun sequencing

Question 14

Which of the following statements about restriction fragment length polymorphisms (RFLPs) is correct?

Accepted Answer

RFLPs are used in DNA fingerprinting to distinguish individuals.

Question 15

Which of the following is a correct description of a gene?

Accepted Answer

A chromosomal segment that encodes for a single polypeptide chain, an RNA molecule, or plays a regulatory function.

Question 16

Which of the following is TRUE about the nuclear pore complex?

Accepted Answer

It is composed of 500 to 1000 protein molecules called nucleoporins.

Question 17

Why can't transcription and translation be directly coupled in eukaryotic cells?

Accepted Answer

Because transcription occurs in the nucleus and translation occurs in the cytoplasm.

Question 18

Which of the following is a function of exportins and importins in the nucleus?

Accepted Answer

They assist with the selective transport of RNA and protein between the nucleus and cytoplasm.

Question 19

Which of the following best describes the physical nature of the Escherichia coli genome?

Accepted Answer

Circular duplex

Question 20

Which of the following statements about chromosome neighborhoods is correct?

Accepted Answer

They are regions of DNA that are far apart linearly but close together in three-dimensional space.

Genes, Genomes, and Chromosomes: Structure, Organization, and Analysis

Study Guide - Practice Questions