|
1.1 The study of life Read Online
Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.
Chapter 16: Gene Expression MCQ Multiple Choices Questions Quiz Test Bank
16.1 Regulation of Gene Expression
16.2 Prokaryotic Gene Regulation
16.3 Eukaryotic Epigenetic Gene Regulation
16.4 Eukaryotic Transcription Gene Regulation
16.5 Eukaryotic Post-transcriptional Gene Regulation
16.6 Eukaryotic Translational and Post-translational Gene Regulation
16.7 Cancer and Gene Regulation
Download MCQ Quiz PDF eBook
Question: Control of gene expression in eukaryotic cells occurs at which level(s)?
Choices:
only the transcriptional level
epigenetic and transcriptional levels
epigenetic, transcriptional, and translational levels
epigenetic, transcriptional, posttranscriptional, translational, and posttranslational levels
Question: What are epigenetic modifications?
Choices:
the addition of reversible changes to histone proteins and DNA
the removal of nucleosomes from the DNA
the addition of more nucleosomes to the DNA
mutation of the DNA sequence
Question: Binding of an RNA binding protein will ________ the stability of the RNA molecule.
Choices:
increase
decrease
neither increase nor decrease
either increase or decrease
Question: The binding of ________ is required for transcription to start.
Choices:
a protein
DNA polymerase
RNA polymerase
a transcription factor
Question: What will result from the binding of a transcription factor to an enhancer region?
Choices:
decreased transcription of an adjacent gene
increased transcription of a distant gene
alteration of the translation of an adjacent gene
initiation of the recruitment of RNA polymerase
Question: Prokaryotic cells lack a nucleus. Therefore, the genes in prokaryotic cells are:
Choices:
all expressed, all of the time
transcribed and translated almost simultaneously
transcriptionally controlled because translation begins before transcription ends
b and c are both true
Question: Which of the following are true of epigenetic changes?
Choices:
allow DNA to be transcribed
move histones to open or close a chromosomal region
are temporary
all of the above
Question: If glucose is absent, but so is lactose, the lac operon will be ________.
Choices:
activated
repressed
activated, but only partially
mutated
Question: Which of the following are involved in posttranscriptional control?
Choices:
control of RNA splicing
control of RNA shuttling
control of RNA stability
all of the above
Question: Post-translational control refers to:
Choices:
regulation of gene expression after transcription
regulation of gene expression after translation
control of epigenetic activation
period between transcription and translation
Question: Post-translational modifications of proteins can affect which of the following?
Choices:
protein function
transcriptional regulation
chromatin modification
all of the above
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|