NEW BIO TEXT BANK EXAM CH 6 GENOMES QUESTIONS WITH ANSWERS A+ 2023 GUARANTEED SUCCESS

NEW BIO TEXT BANK EXAM CH 6 GENOMES
QUESTIONS WITH ANSWERS A+ 2023
GUARANTEED SUCCESS
Multiple Choice
 Introns are found
a. commonly in eukaryotic genes and rarely in prokaryotic genes.
b. only in eukaryotic genes.
c. commonly in both eukaryotic and prokaryotic genes.
d. only in prokaryotic genes.
Answer: a
Textbook Reference: The Structure of Eukaryotic Genomes
Bloom’s Category: 1. Remembering
Learning Objective: Diagram the structure of typical genes in bacteria, yeast, and
humans.

 Histone genes have
a. a single long intron.
b. no introns.
c. larger introns than exons.
d. larger exons than introns.
Answer: b
Textbook Reference: The Structure of Eukaryotic Genomes
Bloom’s Category: 1. Remembering
Learning Objective: Diagram the structure of typical genes in bacteria, yeast, and
humans.

 Introns constitute about what percentage of the average human gene?
a. 3%
b. 40%
c. 60%
d. 90%
Answer: d
Textbook Reference: The Structure of Eukaryotic Genomes
Bloom’s Category: 1. Remembering
Learning Objective: Diagram the structure of typical genes in bacteria, yeast, and
humans.

 A gene family is a
a. set of related but slightly different genes present in one individual.
b. family of individuals with the same gene.
c. set of slightly different genes present as one copy each in a set of individuals.
d. family of individuals in which each has an identical sequence of the same gene.
Answer: a
Textbook Reference: The Structure of Eukaryotic Genomes
Bloom’s Category: 1. Remembering
Learning Objective: Diagram the structure of typical genes in bacteria, yeast, and
humans.

 What is the term used to describe functional protein encoding regions found
completely within an intron?
a. Pseudogene

, NEW BIO TEXT BANK EXAM CH 6 GENOMES
QUESTIONS WITH ANSWERS A+ 2023
GUARANTEED SUCCESS
b. Polymorphism
c. Nested gene
d. Alternative splicing
Answer: c
Textbook Reference: The Structure of Eukaryotic Genomes
Bloom’s Category: 1. Remembering
Learning Objective: Explain how an intron can encode a functional protein.

 Synthesis of different proteins from the same gene is due to
a. intron shuffling.
b. exon shuffling.
c. alternative splicing.
d. exon splicing.
Answer: c
Textbook Reference: The Structure of Eukaryotic Genomes
Bloom’s Category: 1. Remembering
Learning Objective: Show how alternative splicing can generate multiple different
proteins from a single gene.

 During the processing of miRNAs, which of the following cleaves the 5ʹ and 3ʹ
tails away from the hairpin structure in the primary miRNA transcript?
a. Drosha
b. Dicer
c. RNAse
d. Integrase
Answer: a
Textbook Reference: Noncoding Sequences
Bloom’s Category: 1. Remembering
Learning Objective: Distinguish miRNAs from lncRNAs.

 The consequence of the action of many miRNAs is the blocking or reduction of the
eventual expression of proteins. What is the mechanism of action by which miRNAs
accomplish this?
a. miRNAs complementary base pair with mRNAs and inhibit translation and
stimulate mRNA degradation.
b. miRNAs complementary base pair to regulatory regions of genes and inhibit the
transcription of genes.
c. miRNAs complementary base pair to the active site on rRNAs and prevent the
mRNA from interacting with ribosomes.
d. miRNAs complementary base pair with intron-exon boundary sequences and
prevent correct mRNA processing.
Answer: a
Textbook Reference: Noncoding Sequences
Bloom’s Category: 2. Understanding
Learning Objective: Distinguish miRNAs from lncRNAs.

 Simple-sequence repeats
a. are not transcribed.

, NEW BIO TEXT BANK EXAM CH 6 GENOMES
QUESTIONS WITH ANSWERS A+ 2023
GUARANTEED SUCCESS
b. are present in tandem arrays of thousands of copies.
c. account for approximately 10% of the human genome.
d. All of the above
Answer: d
Textbook Reference: The Structure of Eukaryotic Genomes
Bloom’s Category: 2. Understanding
Learning Objective: Describe the different types of repetitive DNA sequences.

 Pseudogenes are
a. genes that code for an RNA but do not code for a protein.
b. nonfunctional gene copies.
c. inactive genes.
d. genes containing variant sequences.
Answer: b
Textbook Reference: The Structure of Eukaryotic Genomes
Bloom’s Category: 1. Remembering
Learning Objective: Describe the different types of repetitive DNA sequences.

 Retrotransposons and retroviruses share similar mechanisms by encoding which of
the following enzymes?
a. Reverse transcriptase and RNA polymerase
b. Reverse transcriptase and integrase
c. RNA polymerase and integrase
d. DNA polymerase and integrase
Answer: b
Textbook Reference: Noncoding Sequences
Bloom’s Category: 2. Understanding
Learning Objective: Explain how transposable elements can affect gene expression.

 Most pseudogenes are thought to have originated via
a. duplication of genes that then became nonfunctional through mutation.
b. reverse transcription of an mRNA and integration of the cDNA into a
new chromosomal site.
c. genome-wide duplication and the inactivation of one homolog by mutation.
d. fusion of a prokaryotic cell with a eukaryotic cell.
Answer: b
Textbook Reference: The Structure of Eukaryotic Genomes
Bloom’s Category: 1. Remembering
Learning Objective: Distinguish processed pseudogenes from pseudogenes that arose by
DNA duplication.

 Which of the following is the most abundant form of chromatin in the interphase
nucleus of a cell?
a. Euchromatin
b. Nucleoli
c. Chromosomes
d. Heterochromatin
Answer: a
Textbook Reference: Chromosomes and Chromatin