Biology 1 - The Life Sciences » 2019 » Module 4 Exam
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Question #1
RNA is composed of building blocks called
A.
disaccharides
B.
phospholipids
C.
monosaccharides
D.
nucleotides
E.
amino acids
Question #2
In Transcription, DNA is copied to produce
A.
transfer RNA
B.
a ribosome
C.
messenger RNA
D.
RNA polymerase
Question #3
In Translation, what brings in new amino acids?
A.
RNA polymerase
B.
the transfer RNA
C.
the ribosome
D.
the amino acids
Question #4
RNA differs from DNA in many ways, including
A.
DNA is double stranded and RNA is single stranded.
B.
DNA contains thymine and RNA contains uracil instead of thymine
C.
DNA contains deoxyribose and RNA contains ribose
D.
RNA can catalyze some chemical reactions and DNA cannot.
E.
All of the above are correct
Question #5
If the DNA template strand has the following sequence, what would be the nucleotide sequence of the complementary RNA molecule produced in transcription? Template strand: GACCTTA
A.
CUGGAAU
B.
AGTCTT
C.
TCAGAA
D.
UCAGAA
Question #6
rRNA carries the instructions for translation.
A.
FALSE
B.
TRUE
Question #7
Proteins are made up of ______ different kinds of amino acid.
A.
20
B.
50
C.
4
D.
46
Question #8
In eukaryotic cells, sequences of mRNA that are NOT removed before translation are called
A.
exons
B.
introns
C.
terminators
D.
anticodons
Question #9
What is the anticodon for GUU?
A.
TAG
B.
UAG
C.
CAA
D.
None of the above
Question #10
Your entire genetic code is analogous to ________________.
A.
a cook
B.
a cookbook
C.
an electric motor
D.
a recipe
Question #11
The step of translation in which the first amino acids joins the ribosome and mRNA is
A.
termination
B.
elongation
C.
initiation
D.
mitosis
Question #12
A group of genes, a promoter, and an operator that control transcription are called a(n
A.
translational unit.
B.
chromosome.
C.
operon.
D.
ribosome.
E.
envelope.
Question #13
What amino acid code does ACU code for?
A.
Serine
B.
Proline
C.
both Serine and Proline
D.
Leucine
E.
Threonine
F.
Arginine
Question #14
In a "nonsense" mutation
A.
the codon that mutates does not cause a change in the amino acid specified.
B.
the mutation is not in DNA.
C.
the codon that mutates causes a change in the amino acid specified.
D.
the codon that mutates causes a stop codon to occur instead of the placement of an amino acid.
Question #15
How many codons are in the mRNA sequence GGAAUGAAACAGGAACCCAAA?
A.
18
B.
10
C.
7
D.
4
Question #16
All mutations involve some kind of change in the genetic code.
A.
FALSE
B.
TRUE
Question #17
All mutations are harmful
A.
TRUE
B.
FALSE
Question #18
Many viruses are inhibited by antibiotics
A.
TRUE
B.
FALSE
Question #19
DNA is packaged in units called
A.
chromosomes
B.
histones
C.
centromeres
D.
centrosomes
Question #20
Bacteria go through a form of cell division called _____________.
A.
binary fission
B.
Cytokinesis
C.
binary fusion
D.
None of the above
Question #21
The majority of a cell's life cycle is spent in
A.
G2 phase
B.
Mitosis
C.
Cytokinesis
D.
Interphase
Question #22
In mitosis of animal cells, cytokinesis involves the
A.
the formation of a cleavage furrow
B.
formation of the membranes
C.
the splitting of nucleus
D.
the formation of a cell plate
Question #23
Which phase of the cell cycle directly precedes mitosis?
A.
G2 phase
B.
Cytokinesis
C.
S phase
D.
G1 phase
Question #24
When a cell first enters into cell division, the DNA in its nucleus
A.
is copied
B.
completely disintegrates
C.
condenses to form thick, ribbonlike chromosomes
D.
unravels to form chromatin
Question #25
When, during mitosis, do we first see the functioning centrosomes?
A.
Prophase
B.
Metaphase
C.
Anaphase
D.
Telophase
Question #26
Which phase of mitosis occurs second in the change of events?
A.
Metaphase
B.
Telophase
C.
Prophase
D.
Anaphase
Question #27
Which phase of mitosis involves the forming of the nuclear membrane?
A.
Telophase
B.
Anaphase
C.
Prophase
D.
Metaphase
Question #28
In some fungi and slime molds, mitosis may occur without cytokinesis. What would you expect to find in these species?
A.
cells that don't contain nuclei
B.
DNA that never condenses into visible chromosomes
C.
nuclei that never enter interphase
D.
cells that contain multiple nuclei
Question #29
During cytokinesis of a plant cell, the cell divides by forming a cleavage furrow.
A.
TRUE
B.
FALSE
Question #30
The chemotherapy drug taxol inhibits microtubule function. A cell treated with taxol would become stuck in which phase?
A.
telophase
B.
telophase
C.
anaphase
D.
prophase
Question #31
Cancer is believed to be associated with a failure of the cell cycle.
A.
TRUE
B.
FALSE
Question #32
What is the main function of DNA?,,
A.
to encode proteins
B.
to produce ATP
C.
to provide structural support to the cell
D.
to speed up cell reactions
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