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.
nucleotides
C.
amino acids
D.
monosaccharides
E.
phospholipids
Question #2
In Transcription, DNA is copied to produce
A.
RNA polymerase
B.
messenger RNA
C.
transfer RNA
D.
a ribosome
Question #3
In Translation, what brings in new amino acids?
A.
the ribosome
B.
the transfer RNA
C.
the amino acids
D.
RNA polymerase
Question #4
RNA differs from DNA in many ways, including
A.
RNA can catalyze some chemical reactions and DNA cannot.
B.
DNA is double stranded and RNA is single stranded.
C.
DNA contains deoxyribose and RNA contains ribose
D.
DNA contains thymine and RNA contains uracil instead of thymine
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.
UCAGAA
B.
CUGGAAU
C.
AGTCTT
D.
TCAGAA
Question #6
rRNA carries the instructions for translation.
A.
TRUE
B.
FALSE
Question #7
Proteins are made up of ______ different kinds of amino acid.
A.
46
B.
4
C.
50
D.
20
Question #8
In eukaryotic cells, sequences of mRNA that are NOT removed before translation are called
A.
terminators
B.
anticodons
C.
exons
D.
introns
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 cookbook
B.
a cook
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.
elongation
B.
termination
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.
ribosome.
D.
operon.
E.
envelope.
Question #13
What amino acid code does ACU code for?
A.
Proline
B.
Threonine
C.
both Serine and Proline
D.
Arginine
E.
Leucine
F.
Serine
Question #14
In a "nonsense" mutation
A.
the codon that mutates causes a change in the amino acid specified.
B.
the mutation is not in DNA.
C.
the codon that mutates causes a stop codon to occur instead of the placement of an amino acid.
D.
the codon that mutates does not cause a change in the amino acid specified.
Question #15
How many codons are in the mRNA sequence GGAAUGAAACAGGAACCCAAA?
A.
18
B.
7
C.
4
D.
10
Question #16
All mutations involve some kind of change in the genetic code.
A.
TRUE
B.
FALSE
Question #17
All mutations are harmful
A.
FALSE
B.
TRUE
Question #18
Many viruses are inhibited by antibiotics
A.
FALSE
B.
TRUE
Question #19
DNA is packaged in units called
A.
centromeres
B.
chromosomes
C.
histones
D.
centrosomes
Question #20
Bacteria go through a form of cell division called _____________.
A.
binary fusion
B.
binary fission
C.
Cytokinesis
D.
None of the above
Question #21
The majority of a cell's life cycle is spent in
A.
Interphase
B.
Cytokinesis
C.
Mitosis
D.
G2 phase
Question #22
In mitosis of animal cells, cytokinesis involves the
A.
the formation of a cell plate
B.
the formation of a cleavage furrow
C.
the splitting of nucleus
D.
formation of the membranes
Question #23
Which phase of the cell cycle directly precedes mitosis?
A.
G2 phase
B.
G1 phase
C.
S phase
D.
Cytokinesis
Question #24
When a cell first enters into cell division, the DNA in its nucleus
A.
completely disintegrates
B.
unravels to form chromatin
C.
condenses to form thick, ribbonlike chromosomes
D.
is copied
Question #25
When, during mitosis, do we first see the functioning centrosomes?
A.
Metaphase
B.
Telophase
C.
Anaphase
D.
Prophase
Question #26
Which phase of mitosis occurs second in the change of events?
A.
Anaphase
B.
Telophase
C.
Prophase
D.
Metaphase
Question #27
Which phase of mitosis involves the forming of the nuclear membrane?
A.
Prophase
B.
Anaphase
C.
Metaphase
D.
Telophase
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.
prophase
C.
anaphase
D.
telophase
Question #31
Cancer is believed to be associated with a failure of the cell cycle.
A.
FALSE
B.
TRUE
Question #32
What is the main function of DNA?,,
A.
to produce ATP
B.
to provide structural support to the cell
C.
to speed up cell reactions
D.
to encode proteins
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