CBE 235 Exam 1 clicker, homework, and
previous exam questions with the correct
answers
Which of the following was not a conclusion of Mendel's experiments? a.Discrete particle model of
inheritance was valid.
b.Genes on the same chromosome do not sort independently.
c.When two different alleles were present in an organism, the traits conferred by one of the alleles were
not observed
d.Each plant received a copy of each gene from each parent. - CORRECT ANSWER✔✔b
Base pairing in DNA always follows which pa5ern?
A. adenines bond to cytosines
B. purines bond to pyrimidines
C. guanines bond to thymines
D. purines bond to purines and pyrimidines bond to pyrimidines - CORRECT ANSWER✔✔b
Which of the following forms of DNA could serve as a template for DNA polymerase in the absence of
any other nucleic acid polymers or enzymes?
a.partially double-stranded DNA
b.circular single-stranded DNA
c.circular double-stranded DNA
d.intact double-stranded DNA - CORRECT ANSWER✔✔a
,Another name for the strand of DNA that serves as the template for RNA synthesis is:
a.Sense strand
b.+ strand
c.- strand
d.Coding strand
e.All of the above
f.None of the above - CORRECT ANSWER✔✔c
Which of the following statements regarding translation is untrue?
a. Start codons in prokaryotes encode a Met.
b. One molecule of GTP provides the energy for each amino acid addition to the polypeptide.
c. EF-G assists charged tRNA binding to the A site.
d. all of the above
e. none of the above - CORRECT ANSWER✔✔d
A tRNA with the anticodon sequence 5'-IGU-3' could translate which of the following codons?
a. 5'-ACG-3'
b. 5'-AUU-3'
c. 5'-ACA-3'
d. 5'-GCA-3'
e. all of the above
f. none of the above - CORRECT ANSWER✔✔c
A promoter is
A.a binding site for RNA polymerase
,B.a protein factor necessary for transcription
C.a protein factor necessary for translation
D.a sequence found in the 5' UTR of mRNA
E.None of the above - CORRECT ANSWER✔✔a
Which of the following is a difference between transcription and DNA replication?
a.DNA polymerase requires complete unwinding of the double helix
b.RNA is synthesized by its polymerase in the 5' - 3' direction
c.DNA replication relies on base pairing to dictate the sequence of the newly synthesized strand
d.RNA synthesis requires energy released through hydrolysis of phosphate bonds of nucleoside
triphosphates - CORRECT ANSWER✔✔a
Of the following elements, which is likely to form a covalent bond with hydrogen having the strongest
dipole?
a. carbon
b. oxygen
c. sulfur
d. phosphorous - CORRECT ANSWER✔✔b
Which of the following small proteins could potentially form a quaternary structure with covalently
bonded subunits?
a.KLASTVLILWYSDHLEQGG b.TPMHNVAAEWQAIGHKR c.STAAYLKLFDPQILEVMSG
d.ASLLYWIPGSGKECVALN
e.None of the above - CORRECT ANSWER✔✔d
Describe the central dogma of genetics - CORRECT ANSWER✔✔Genes are made of DNA, expressed as
an RNA intermediary that is decoded to make proteins
, What is the difference between DNA and RNA - CORRECT ANSWER✔✔The sugar ring in RNA has an
extra hydroxyl group that is missing in the pentose of DNA
What is a gene - CORRECT ANSWER✔✔Discrete unit of inheritance
what is an allele - CORRECT ANSWER✔✔Different forms of a gene
What is a transformation - CORRECT ANSWER✔✔An alteration resulting from uptake or incorporation
of a foreign DNA into a host cell
What is a phenotype - CORRECT ANSWER✔✔Externally observable characteristic
What is a genotype - CORRECT ANSWER✔✔Genetic characteristic(s)
What are linkage groups - CORRECT ANSWER✔✔Alleles for different genes that are inherited jointly,
rather than sorting independently; e.g. genes on the same chromosome
What is antiparallel - CORRECT ANSWER✔✔Two adjacent polymer strands run in opposite directions
What is complementarity - CORRECT ANSWER✔✔The property of double stranded DNA in which the
sequence of one strand is fixed relative to the other due to base pairing
Describe the difference between the fluid blending and discrete particle models of inheritance -
CORRECT ANSWER✔✔In fluid blending, the offspring blend parental traits which are then inseparable
by later generations while in discrete inheritance, the combined traits can be re-segregated and
inherited separately by later generations.
previous exam questions with the correct
answers
Which of the following was not a conclusion of Mendel's experiments? a.Discrete particle model of
inheritance was valid.
b.Genes on the same chromosome do not sort independently.
c.When two different alleles were present in an organism, the traits conferred by one of the alleles were
not observed
d.Each plant received a copy of each gene from each parent. - CORRECT ANSWER✔✔b
Base pairing in DNA always follows which pa5ern?
A. adenines bond to cytosines
B. purines bond to pyrimidines
C. guanines bond to thymines
D. purines bond to purines and pyrimidines bond to pyrimidines - CORRECT ANSWER✔✔b
Which of the following forms of DNA could serve as a template for DNA polymerase in the absence of
any other nucleic acid polymers or enzymes?
a.partially double-stranded DNA
b.circular single-stranded DNA
c.circular double-stranded DNA
d.intact double-stranded DNA - CORRECT ANSWER✔✔a
,Another name for the strand of DNA that serves as the template for RNA synthesis is:
a.Sense strand
b.+ strand
c.- strand
d.Coding strand
e.All of the above
f.None of the above - CORRECT ANSWER✔✔c
Which of the following statements regarding translation is untrue?
a. Start codons in prokaryotes encode a Met.
b. One molecule of GTP provides the energy for each amino acid addition to the polypeptide.
c. EF-G assists charged tRNA binding to the A site.
d. all of the above
e. none of the above - CORRECT ANSWER✔✔d
A tRNA with the anticodon sequence 5'-IGU-3' could translate which of the following codons?
a. 5'-ACG-3'
b. 5'-AUU-3'
c. 5'-ACA-3'
d. 5'-GCA-3'
e. all of the above
f. none of the above - CORRECT ANSWER✔✔c
A promoter is
A.a binding site for RNA polymerase
,B.a protein factor necessary for transcription
C.a protein factor necessary for translation
D.a sequence found in the 5' UTR of mRNA
E.None of the above - CORRECT ANSWER✔✔a
Which of the following is a difference between transcription and DNA replication?
a.DNA polymerase requires complete unwinding of the double helix
b.RNA is synthesized by its polymerase in the 5' - 3' direction
c.DNA replication relies on base pairing to dictate the sequence of the newly synthesized strand
d.RNA synthesis requires energy released through hydrolysis of phosphate bonds of nucleoside
triphosphates - CORRECT ANSWER✔✔a
Of the following elements, which is likely to form a covalent bond with hydrogen having the strongest
dipole?
a. carbon
b. oxygen
c. sulfur
d. phosphorous - CORRECT ANSWER✔✔b
Which of the following small proteins could potentially form a quaternary structure with covalently
bonded subunits?
a.KLASTVLILWYSDHLEQGG b.TPMHNVAAEWQAIGHKR c.STAAYLKLFDPQILEVMSG
d.ASLLYWIPGSGKECVALN
e.None of the above - CORRECT ANSWER✔✔d
Describe the central dogma of genetics - CORRECT ANSWER✔✔Genes are made of DNA, expressed as
an RNA intermediary that is decoded to make proteins
, What is the difference between DNA and RNA - CORRECT ANSWER✔✔The sugar ring in RNA has an
extra hydroxyl group that is missing in the pentose of DNA
What is a gene - CORRECT ANSWER✔✔Discrete unit of inheritance
what is an allele - CORRECT ANSWER✔✔Different forms of a gene
What is a transformation - CORRECT ANSWER✔✔An alteration resulting from uptake or incorporation
of a foreign DNA into a host cell
What is a phenotype - CORRECT ANSWER✔✔Externally observable characteristic
What is a genotype - CORRECT ANSWER✔✔Genetic characteristic(s)
What are linkage groups - CORRECT ANSWER✔✔Alleles for different genes that are inherited jointly,
rather than sorting independently; e.g. genes on the same chromosome
What is antiparallel - CORRECT ANSWER✔✔Two adjacent polymer strands run in opposite directions
What is complementarity - CORRECT ANSWER✔✔The property of double stranded DNA in which the
sequence of one strand is fixed relative to the other due to base pairing
Describe the difference between the fluid blending and discrete particle models of inheritance -
CORRECT ANSWER✔✔In fluid blending, the offspring blend parental traits which are then inseparable
by later generations while in discrete inheritance, the combined traits can be re-segregated and
inherited separately by later generations.
