Download Unit 9 Test Review

Unit 9 Test Review
IB Biology
• Which of the following reactions occurs when
a dipeptide is formed from amino acids?
• A. Hydrolysis
• B. Denaturation
• C. Condensation
• D. Oxidation
• Which is not a primary function of protein
molecules?
• A. Hormones
• B. Energy storage
• C. Transport
• D. Structure
• Which structure represents an amino acid?
A.
H
N
H
C.
C
O
N
C
OH
N
H
H
D.
H
H
H
C
H
H
H
B.
H
O
H
SH
H
N
H
C
OH
H
C
C
O
C
H
O
C
OH
• The diagram below shows a channel protein in
a membrane. Which parts of the surface of
the protein would be composed of polar
amino acids.
• A. I and II only
• B. II and III only
• C. III and IV only
• D. I and IV only
• Which of the following could be a function of
a membrane protein?
• A. Energy storage
• B. Enzymatic activity
• C. Oxygen uptake
• D. Thermal insulation
• Which diagram correctly illustrates a
dipeptide?
A.
H
N
C.
H
O
H
H
C
C
N
C
H
H
H
H
H
C
C
N
H
H
O
H
C
N
H
OH
H
H
O
N
C
H
B.
D.
O
H
H
C
C
N
C
H
H
H
H
O
C
C
C
N
OH
H
H
H
O
C
H
OH
H
H
O
N
C
H
C
OH
• What is removed to form mature eukaryotic
mRNA?
• A. RNA primers
• B. Exons
• C. RNA polymerases
• D. Introns
• A certain gene codes for a polypeptide that is
120 amino acids long. Approximately how
many nucleotides long is the mRNA that codes
for this polypeptide likely to be?
• A. 30
• B. 40
• C. 360
• D. 480
• Where do transcription and translation occur
in eukaryotic cells?
Transcription
Translation
A.
Cytoplasm
Cytoplasm
B.
Cytoplasm
Mitochondria
C.
Nucleus
Cytoplasm
D.
Nucleus
Nucleus
• What is a difference between the sense and antisense
strands of DNA?
• A. Nucleotides are linked to the sense strand by
hydrogen bonding during transcription, but not to the
antisense strand.
• B. The sense strand has the same base sequence as
tRNA, but the antisense strand does not.
• C. Nucleotides are linked to the antisense strand by
hydrogen bonding during transcription, but not to the
sense strand.
• D. The antisense strand has the same base sequence
as mRNA but the sense strand does not.
• The diagram below represents an animal cell.
• Which processes occur in the locations
labeled?
Translatio
Transcription
Respiration
n
A.
II
III
I
B.
III
II
I
C.
II
III
IV
D.
III
II
IV
•
•
•
•
•
Where is an anti-codon located?
A. tRNA
B. mRNA
C. DNA
D. Ribosomes
•
•
•
•
•
Which substance is a base found in RNA?
A. Ribose
B. Thymine
C. Adenosine
D. Uracil
• During the process of translation which of the
following statements describes the relationship
between nucleic acids?
• A. Anticodons on mRNA bind to complementary
codons on DNA.
• B. Anticodons on tRNA bind to complementary
codons on mRNA.
• C. Bases on DNA bind to complementary bases
on mRNA.
• D. A single strand of mRNA is produced from the
DNA in the nucleus.
• What is an intron?
• A. The 3  5 strand of a DNA double
helix
• B. The 5  3 strand of a DNA double
helix
• C. A section of mRNA removed before
translation
• D. A tRNA with a start anticodon
• How would the following DNA sequence,
ACGTTGCATGGCA, be transcribed?
• A. UGCAACGUACCGU
• B. TGCAACGTACCGT
• C. ACGTTGCATGGCA
• D. ACGUUGCAUGGCA
• Which are the correct directions of the
following processes?
Replication Transcription
Translation
A.
5’ to 3’
3’ to 5’
3’ to 5’
B.
3’ to 5’
5’ to 3’
5’ to 3’
C.
5’ to 3’
5’ to 3’
5’ to 3’
D.
3’ to 5’
3’ to 5’
3’ to 5’
• Which stage of translation is illustrated by the
diagram below?
•
• A. Termination
• B. Initiation
• C. Translocation
• D. Elongation
• Why are the messenger RNA molecules received by
eukaryotic ribosomes shorter than the messenger RNA
molecules formed by transcription of DNA?
• A. Base deletion mutations make the mRNA shorter.
• B. Start codons are not at the end of the mRNA
molecule.
• C. Introns are removed before the RNA is translated.
• D. Bases are removed from the ends of the mRNA
each time it is translated.
• A certain gene in a bacterium codes for a
polypeptide that is 120 amino acids long. How
many nucleotides are needed in the mRNA to
code for this polypeptide?
• A. 30
• B. 40
• C. 360
• D. 480
• What enzyme is used in transcription but not
in translation?
• A. DNA polymerase
• B. Helicase
• C. Protease
• D. RNA polymerase
• If mRNA has a codon CAU, what is the
corresponding anticodon on the tRNA
molecule?
• A. CAT
• B. GUA
• C. CAU
• D. GTA
• The sequence of nucleotides in a section of RNA
is:
•
GCCAUACGAUCG
•
What is the base sequence of the DNA sense
strand?
• A. CGGUAUGCUAGC
• B. GCCATACGATCG
• C. CGGTATGCTAGC
• D. GCCAUACGAUCG
• Where does the RNA polymerase bind during
the process of transcription?
• A. The polysome
• B. The operator
• C. The promoter
• D. The initiator
• What sequence of processes is carried out by the structure
labelled X during translation?
• A. Combining with an amino acid and then binding to an
anticodon
• B. Binding to an anticodon and then combining with an
amino acid
• C. Binding to a codon and then combining with an amino
acid
• D. Combining with an amino acid and then binding to a
codon
• In some people, hemoglobin always contains the
amino acid valine in place of a glutamic acid at
one position in the protein. What is the cause of
this?
• A. An error in transcription of the hemoglobin
gene
• B. An error in translation of the mRNA
• C. Lack of glutamic acid in the diet
• D. A base substitution in the hemoglobin gene
• What is removed during the formation of
mature RNA in eukaryotes?
• A. Exons
• B. Introns
• C. Codons
• D. Nucleosomes
• The table below shows the codons that determine
different amino acids in protein translation.
•
•
•
•
•
•
What is the sequence of the amino acids that is
being translated from the following mRNA sequence?
5´ AUGGGUGCUUAUUGGUAA 3´
A. Met-Pro-Arg-Ile-Thr
B. Met-Cys-Ser-Tyr-Trp
C. Met-Gly-Ala-Tyr-Trp
D. Met-Gly-Tyr-Ala-Thr
• What does the universal nature of the genetic
code allow?
• A. Change of genetic code in the same
species
• B. Transfer of genes between species
• C. Formation of clones
• D. Infection by bacteria
• What is a polysome?
• A. A ribosome that is synthesizing proteins from
several mRNA molecules at the same time
• B. A ribosome that is synthesizing different
proteins for secretion
• C. Several ribosomes using a mRNA molecule to
synthesize protein at the same time
• D. Several ribosomes that are synthesizing
different proteins for use in the cytoplasm
• What is a codon?
• A. A sequence of nucleotides on rRNA that
corresponds to an amino acid
• B. A sequence of nucleotides on mRNA that
corresponds to an amino acid
• C. A sequence of nucleotides on tRNA that
corresponds to an amino acid
• D. A sequence of nucleotides on DNA that
corresponds to an amino acid
• The antisense strand on the DNA molecule coding
for three codons of a gene is
•
TATCGCACG
•
What are the anticodons of the three tRNA
molecules that correspond to this sequence?
• A. UAU, CGC and ACG
• B. ATA, GCG and TGC
• C. AUA, GCG and UGC
• D. TAT, CGC and ACG
• What is the function of the tRNA activating
enzyme?
• A. It links tRNA to ribosomes.
• B. It links tRNA to mRNA.
• C. It links tRNA to a specific amino acid.
• D. It links an amino acid on one tRNA to an
amino acid on another tRNA.
•
•
•
•
•
What happens during translation?
A. Copying of DNA to produce DNA
B. Copying of DNA to produce mRNA
C. Copying of DNA to produce tRNA
D. Polypeptide synthesis
• A certain gene in a bacterium codes for a
polypeptide that is 120 amino acids long. How
many nucleotides are needed in the mRNA to
code for this polypeptide?
• A. 30
• B. 40
• C. 360
• D. 480
• What enzyme is used in transcription but not
in translation?
• A. DNA polymerase
• B. Helicase
• C. Protease
• D. RNA polymerase
• If mRNA has a codon CAU, what is the
corresponding anticodon on the tRNA
molecule?
• A. CAT
• B. GUA
• C. CAU
• D. GTA