Biology 16 Gene Expression MCQ


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This NASA image is a composite of several satellite-based views of Earth. To make the whole-Earth image, NASA scientists combine observations of different parts of the planet. (credit: NASA/GSFC/NOAA/USGS)

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.

Unit 3. Genetics

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

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Biology 16 Gene Expression MCQ
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Sample Questions from the Biology 16 Gene Expression MCQ Quiz

Question: Post-translational modifications of proteins can affect which of the following?


protein function

transcriptional regulation

chromatin modification

all of the above

Question: Which of the following are true of epigenetic changes?


allow DNA to be transcribed

move histones to open or close a chromosomal region

are temporary

all of the above

Question: Prokaryotic cells lack a nucleus. Therefore, the genes in prokaryotic cells are:


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: If glucose is absent, but so is lactose, the lac operon will be ________.




activated, but only partially


Question: The binding of ________ is required for transcription to start.


a protein

DNA polymerase

RNA polymerase

a transcription factor

Question: Binding of an RNA binding protein will ________ the stability of the RNA molecule.




neither increase nor decrease

either increase or decrease

Question: What are epigenetic modifications?


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: Control of gene expression in eukaryotic cells occurs at which level(s)?


only the transcriptional level

epigenetic and transcriptional levels

epigenetic, transcriptional, and translational levels

epigenetic, transcriptional, posttranscriptional, translational, and posttranslational levels

Question: Which of the following are involved in posttranscriptional control?


control of RNA splicing

control of RNA shuttling

control of RNA stability

all of the above

Question: What will result from the binding of a transcription factor to an enhancer region?


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: Post-translational control refers to:


regulation of gene expression after transcription

regulation of gene expression after translation

control of epigenetic activation

period between transcription and translation

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Stephanie Redfern
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