Regulation Of Gene Expression In Eukaryotes

This question bank verified by Studydeets

All Questions

Question 1

Free

Short Answer

Please select the best match for each term.
A)Produces more than one protein from one gene
B)A method for targeting RNAs for degradation
C)Gene regulation dependant on parent of origin
D)A method of targeting proteins for degradation
E)Controls transcription initiation
-1)Alternative polyadenylation
2)Genomic imprinting
3)Enhancer
4)Ubiquitination
5)siRNA

Check answer

Question 2

Free

Multiple Choice

A similarity between regulation of the lac operon in bacteria and the regulation of galactose utilization in yeast is that both pathways

Choose correct answer/s

transcribe all the genes necessary as one polycistronic mRNA.

use feedback inhibition to stop making their sugars.

use a modified version of their sugars as inducers.

are subject to catabolite repression.

C and D only

Check answer

Question 3

Free

Multiple Choice

When a promoter element is bound by a positive regulatory protein,the result is

Choose correct answer/s

activation of replication.

activation of transcription.

activation of translation.

repression of replication.

repression of transcription.

Check answer

Question 4

Free

Multiple Choice

Unlike bacterial operons,eukaryotic operons

Choose correct answer/s

are all positively controlled.

are all negatively controlled.

are restricted to certain eukaryotic kingdoms.

are exceedingly rare.

None of these

Check answer

Question 5

Free

Multiple Choice

Hormones can be considered

Choose correct answer/s

inducers.

repressors.

transcription regulators.

translation regulators.

enzymes.

Check answer

Question 6

Multiple Choice

Unlike prokaryotes,most gene regulation in eukaryotes

Choose correct answer/s

takes place at the transcriptional level.

is controlled at the level of transcript processing.

is controlled by inhibitory proteins.

is based on posttranslational modification.

None of these

To unlock the question

Question 7

Multiple Choice

Which of the following secondary structures may be a DNA-binding domain?

Choose correct answer/s

Zinc finger

Leucine zipper

Helix-turn-helix

A and B only

A,B,and C

To unlock the question

Question 8

Multiple Choice

In eukaryotic cells,steroid hormones

Choose correct answer/s

bind to cytoplasmic receptors,are transported to the nucleus,bind DNA,and regulate gene expression.

bind to cell surface receptors and send signals that result in regulation of genes in the nucleus.

act as enhancers and bind to an assortment of activators and repressors.

methylate DNA to regulate gene expression.

cause maternal effect.

To unlock the question

Question 9

Multiple Choice

RNA silencing involves

Choose correct answer/s

miRNAs.

siRNAs.

double-stranded RNA.

a protein called Dicer.

All of these

To unlock the question

Question 10

Multiple Choice

HREs are

Choose correct answer/s

hormone receptors.

DNA sequences in promoter regions to which steroid hormone receptors bind.

proteins that interact with histones.

elements that lead to histone deacetylation.

None of these

To unlock the question

Question 11

Multiple Choice

Chromosome-level gene repression involves

Choose correct answer/s

supercoiling.

physical blockage of gene regions.

chromatin formation.

nucleosomes.

All of these

To unlock the question

Question 12

Multiple Choice

Change in the DNA-histone complex that can increase or decrease transcriptional activity is termed

Choose correct answer/s

induction.

gene regulation.

chromatin remodeling.

nucleosome formation.

None of these

To unlock the question

Question 13

Multiple Choice

The protein class(es)involved in the activation of transcription is (are)

Choose correct answer/s

general transcription factors (GTFs).

transactivators.

coactivators.

A and B only

A,B,and C

To unlock the question

Question 14

Multiple Choice

Control of transcription initiation of eukaryotic protein-coding genes involves

Choose correct answer/s

enhancers.

promoters.

repressors.

activators.

All of these

To unlock the question

Question 15

Multiple Choice

Activators in eukaryotes

Choose correct answer/s

bind to enhancers.

may act as monomers

may act as homodimers.

may act as heterodimers with a DNA binding subunit and an activation subunit.

All of these

To unlock the question

Question 16

Multiple Choice

The half-life of a protein is directly related to

Choose correct answer/s

what kind of cell it is produced in.

its tertiary structure.

whether it is encoded by a constitutively expressed gene.

its N-terminal amino acid residue.

the number of stabilizing cross-linkages.

To unlock the question

Question 17

Multiple Choice

Removal of the 5' G-cap of mRNA transcripts

Choose correct answer/s

prevents transcript transport.

leads to degradation by exonucleases.

extends mRNA half-life.

leads to polyadelylation.

reduces mRNA half-life.

To unlock the question

Question 18

Multiple Choice

mRNA regulation can be achieved at the level of

Choose correct answer/s

transport.

processing.

translation.

life span (degradation).

All of these

To unlock the question

Question 19

Multiple Choice

With respect to genetics,URS stands for

Choose correct answer/s

uracil response system.

upstream regulatory sequence.

upstream repressor-binding sequence.

unregulated repression series.

uniform response system.

To unlock the question

Question 20

Multiple Choice

Proteins that are encoded by the same gene but differ in structure and function are the product of alternative splicing in pre-mRNA processing.Such protein variants are termed

Choose correct answer/s

isoteins.

heteromeric proteins.

isozymes.

protein isoforms.

allelomorphs.

To unlock the question