RNA-S Bio Exam 3 Questions and
Answers Updated 2026
Which of the following is considered a housekeeping protein?
A. cortisol
B. an antibody
C. hemoglobin
D. RNA polymerase
E. insulin - AnswerD
Which would be the best method for determining which genes are being transcribed in a particular
cell type?
A. RNA sequencing (RNA seq)
B. DNA sequencing
C. electron microscopy
D. X-ray crystallography
E. NMR spectroscopy - AnswerA
Which form of control directly influences which mRNAs are selected by ribosomes for the synthesis
of proteins?
A. translational control
B. protein activity control
C. transcriptional control
D. mRNA processing and localization control
E. mRNA degradation control - AnswerA
Although all of the steps involved in expressing a gene can in principle be regulated, what is the most
important stage of control for most genes?
A. RNA processing
B. mRNA translation
C. RNA transport and localization
D. transcription initiation
E. mRNA degradation - AnswerD
, At any given time, a typical differentiated human cell will express how many of its approximately
19,000 protein-coding genes?
A. from 5000 to 15,000
B. about 200
C. about 20
D. all 19,000 - AnswerA
How or where do most transcription regulators bind?
A. to the minor groove of DNA
B. to the major groove of RNA
C. to a DNA sequence called the homeodomain
D. to a DNA sequence called a leucine zipper
E. as dimers - AnswerE
Which of the following statements about eukaryotic activator proteins is false?
A. They stimulate transcriptional initiation by opening up the double helix.
B. They stimulate transcription initiation by recruiting proteins that modify chromatin structure.
C. They stimulate transcription initiation by aiding in the assembly of general transcription factors
and RNA polymerase at the promoter.
D. They stimulate transcription initiation by promoting the assembly of a transcription initiation
complex at the promoter. - AnswerA
What is an operon?
A. a set of genes transcribed as a single mRNA from a single promoter
B. a sequence of DNA that produces a variety of mRNAs
C. a set of genes controlled by the binding of two or more transcription regulators
D. a set of genes that is constitutively active
E. a short sequence of DNA to which a transcription regulator binds - AnswerA
Where do transcription regulators usually bind on a DNA double helix?
A. single-stranded regions
Answers Updated 2026
Which of the following is considered a housekeeping protein?
A. cortisol
B. an antibody
C. hemoglobin
D. RNA polymerase
E. insulin - AnswerD
Which would be the best method for determining which genes are being transcribed in a particular
cell type?
A. RNA sequencing (RNA seq)
B. DNA sequencing
C. electron microscopy
D. X-ray crystallography
E. NMR spectroscopy - AnswerA
Which form of control directly influences which mRNAs are selected by ribosomes for the synthesis
of proteins?
A. translational control
B. protein activity control
C. transcriptional control
D. mRNA processing and localization control
E. mRNA degradation control - AnswerA
Although all of the steps involved in expressing a gene can in principle be regulated, what is the most
important stage of control for most genes?
A. RNA processing
B. mRNA translation
C. RNA transport and localization
D. transcription initiation
E. mRNA degradation - AnswerD
, At any given time, a typical differentiated human cell will express how many of its approximately
19,000 protein-coding genes?
A. from 5000 to 15,000
B. about 200
C. about 20
D. all 19,000 - AnswerA
How or where do most transcription regulators bind?
A. to the minor groove of DNA
B. to the major groove of RNA
C. to a DNA sequence called the homeodomain
D. to a DNA sequence called a leucine zipper
E. as dimers - AnswerE
Which of the following statements about eukaryotic activator proteins is false?
A. They stimulate transcriptional initiation by opening up the double helix.
B. They stimulate transcription initiation by recruiting proteins that modify chromatin structure.
C. They stimulate transcription initiation by aiding in the assembly of general transcription factors
and RNA polymerase at the promoter.
D. They stimulate transcription initiation by promoting the assembly of a transcription initiation
complex at the promoter. - AnswerA
What is an operon?
A. a set of genes transcribed as a single mRNA from a single promoter
B. a sequence of DNA that produces a variety of mRNAs
C. a set of genes controlled by the binding of two or more transcription regulators
D. a set of genes that is constitutively active
E. a short sequence of DNA to which a transcription regulator binds - AnswerA
Where do transcription regulators usually bind on a DNA double helix?
A. single-stranded regions
