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Posted: September 14th, 2023
BIOL350
Quiz
Due
at the end of week 6
Please
submit your answers to your assignment folder.
I only need the letter or appropriate fill in the blank answers for each
question.
Each
question is worth 1 point (27 points total)
Name:
1.
Place the steps listed below in
the correct order:
a.
chromosomes line up in the
center of the cell
b.
Nuclear envelope forms and
chromosomes uncoil
c.
Chromosomes condense and
spindle fibers form
d.
Sister chromatids separate and
move to opposite poles of the cell
_______, _________,
__________, _________
2.
A scientist measures the amount
of DNA in a cell growing in culture in the lab.
The quantity of DNA in the cell would be seen to be double in which of
the cases below:
a.
between prophase and anaphase
of mitosis
b.
between G1 and G2 phases of the
cell cycle
c.
during the M phase of the cell
cycle
3.
DNA replication results in:
a.
Two DNA molecules, one with two
old strands and one with two new strands
b.
Two DNA molecules, each of
which has two new strands
c.
Two DNA molecules, each of
which has one old strand and one new strand
4.
If a strand of DNA has the
sequence 5â-CCTAGGTT-3â, then the complementary strand of DNA has the sequence:
a.
5â-TTUGGCAC-3â
b.
5â-AACCTAGG-3â
c.
5â-GGATCCAA-3â
d.
5â-CCTAGGTT-3â
5.
The DNA of cells is damaged:
a.
thousands of times per day
b.
by collisions with other
molecules, chemical agents and radiation
c.
not very often and only by
radiation
d.
both a and b
6.
Which of these DNA repair
mechanisms is the least reliable in maintaining DNA stability?
a.
Base pair excision
b.
Double-strand break repair
c.
Homologous recombination
7.
Which of the following in an
enzyme that is involved in both cell cycle control and DNA repair?
a.
cyclin B1
b.
BRCA1
c.
Cdk2
8.
The genetic code:
a.
is exactly the same for
mitochondrial and nuclear DNA
b.
differs slightly between
mitochondrial and nuclear DNA because of distinctions in mitochondrial tRNAs
c.
differs slightly between
mitochondria and nuclear DNA because of differences in mitochondrial RNA
polymerase
d.
cannot be different between
mitochondria and nuclear DNA because mitochondria do not have DNA
In
eukaryotic cells, transcription and translation
a.
both occur in the nucleus; mRNA
remains in the nucleus and ribosomes are imported into the nucleus through
nuclear pores
b.
both occur in the cytoplasm
when the nuclear membrane is temporarily dismantled
c.
transcription occurs in the
nucleus; mRNA is then exported through nuclear pores and translation occurs in
the cytoplasm
d.
only occur in the mitochondria
Introns:
a.
represent DNA sequences of a gene that are
translated into protein
b.
represent DNA sequences of a
gene that are not translated into protein
c.
are found more frequently in
eukaryotes than bacteria
d.
are found more frequently in
bacteria than in eukaryotes
e.
a. and c.
f.
b. and c.
What
determines the nucleotide sequence of an RNA strand?
a.
Complementary base pairing with
the template DNA strand during transcription
b.
The amino acid sequence in a
protein
c.
The diversity of nucleotides
available to RNA polymerase
An RNA
molecule elongates in which direction?
a.
5â to 3â
b.
3â to 5â
Bacterial
mRNAs
a.
Are translated as soon as they
are exported from the nucleus
b.
Are transcribed and translated
simultaneously
c.
Are processed in the same way
as eukaryotic mRNAs
Multiple
RNA transcripts can be generated from a single DNA template
a.
True
b.
False
Within
the ribosome, formation of peptide bonds is catalyzed by
a.
Aminoacyl-tRNA-synthetase
b.
The tRNA itself
c.
An RNA molecule in the large
ribosomal subunit
d.
A peptidase in the small
ribosomal subunit
Which
region of the protein is synthesized first by ribosomes
a.
The N-terminus
b.
The C-terminus
Consider the DNA sequence shown below. If RNA polymerase uses the
top strand as its template, what will the sequence of the RNA molecule
produced be? Remember to label the 5â and 3â ends.
5â-ATGACGAAAAGA-3â
||||||||||||
3â-TACTGCTTTTCT-5â
18.
Proteins in the cytosol that
are destined for other organelles must first enter the:
a.
nucleus
b.
Golgi apparatus
c.
Endoplasmic reticulum
d.
Lysosomes
19.
Which of the following is true?
a.
a special class of ribosomes
embedded in the ER translates the proteins destined for that organelle
b.
a common pool of ribosomes is
used to synthesize both proteins that stay in the cytosol and those that are
destined for the ER
c.
all ribosomes are attached to
the ER when they are synthesizing a protein
20.
Which type of protein binds to
improperly folded or improperly assembled proteins in the ER, holding them
there until proper folding occurs?
a.
tethering proteins
b.
glycosylating proteins
c.
chaperone proteins
d.
antibody proteins
21.
Which of the following is NOT
true about the differences between liver cells and kidney cells in the same
organism?
a.
they contain the same genes,
but express them differently
b.
they contain different genes
c.
they contain different sets of
proteins
d.
22.
The correct order of the âflow of informationâ
to generate a protein is:
a.
mRNA to DNA
to protein
b.
DNA to mRNA
to protein
c.
Lipid to
mRNA to protein
23.
In a eukaryotic cell, almost all
_________________ occurs in the nucleus and __________________ occurs mainly at
ribosomes in the cytoplasm. Fill in the
blanks by picking from the following terms:
a.
translation
b.
transcription
24.
A stop-transfer sequence functions to:
a.
block transfer of a hydrophobic
amino acid sequence into the lumen of the endoplasmic reticulum
b.
prevent ribosomes from binding
to the rough endoplasmic reticulum
c.
signal the termination of mRNA
25.
A highly expressed gene is more
likely to be found in a(n)________________ region of the chromosome.
a.
Heterochromatic
b.
Euchromatic
26.
The ___________ directs the ribosome with the
attached mRNA and nascent polypeptide to the endoplasmic reticulum membrane.
a.
tRNA
b.
signal peptidase
c.
SRP
d.
SRP receptor
27.
Which is NOT an example of epigenetic
inheritance?
a.
the inheritance of methylation
patterns in DNA
b.
the inheritance of a single
nucleotide mutation in a gene
c.
the inheritance of patterns of
chromosome condensation
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