CBE 235 Exam 1 clicker, homework, and previous exam questions with the correct answers

CBE 235 Exam 1 Clicker, Homework, And b b b b b b




Previous Exam Questions With The Correct
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Answers b




Which of the following was not a conclusion of Mendel's experiments? a.Discrete particle model of
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inheritance was valid.
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b.Genes on the same chromosome do not sort independently.
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c.When two different alleles were present in an organism, the traits conferred by one of the alleles were not
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observed
b b




d.Each plant received a copy of each gene from each parent. - CORRECT ANSWER✔✔b
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Base pairing in DNA always follows which pa5ern?
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A. adenines bond to cytosines
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B. purines bond to pyrimidines
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C. guanines bond to thymines
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D. purines bond to purines and pyrimidines bond to pyrimidines - CORRECT ANSWER✔✔b
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Which of the following forms of DNA could serve as a template for DNA polymerase in the absence of any
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other nucleic acid polymers or enzymes?
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a.partially double-stranded DNA b b b




b.circular single-stranded DNA b b b




c.circular double-stranded DNA b b b




d.intact double-stranded DNA - CORRECT ANSWER✔✔a
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,Another name for the strand of DNA that serves as the template for RNA synthesis is:
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a.Sense strand b b




b.+ strand b b




c.- strand b b




d.Coding strand b b




e.All of the above b b b b




f.None of the above - CORRECT ANSWER✔✔c
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Which of the following statements regarding translation is untrue?
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a. Start codons in prokaryotes encode a Met.
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b. One molecule of GTP provides the energy for each amino acid addition to the polypeptide.
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c. EF-G assists charged tRNA binding to the A site.
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d. all of the above
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e. none of the above - CORRECT ANSWER✔✔d
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A tRNA with the anticodon sequence 5'-IGU-3' could translate which of the following codons?
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a. 5'-ACG-3'
b




b. 5'-AUU-3'
b




c. 5'-ACA-3'
b




d. 5'-GCA-3'
b




e. all of the above
b b b b




f. none of the above - CORRECT ANSWER✔✔c
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A promoter is
b b




A.a binding site for RNA polymerase
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,B.a protein factor necessary for transcription
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C.a protein factor necessary for translation
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D.a sequence found in the 5' UTR of mRNA
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E.None of the above - CORRECT ANSWER✔✔a
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Which of the following is a difference between transcription and DNA replication?
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a.DNA polymerase requires complete unwinding of the double helix
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b.RNA is synthesized by its polymerase in the 5' - 3' direction
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c.DNA replication relies on base pairing to dictate the sequence of the newly synthesized strand
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d.RNA synthesis requires energy released through hydrolysis of phosphate bonds of nucleoside
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triphosphates - CORRECT ANSWER✔✔a
b b b b




Of the following elements, which is likely to form a covalent bond with hydrogen having the strongest
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dipole?
b b




a. carbon
b b




b. oxygen
b b




c. sulfur
b b




d. phosphorous - CORRECT ANSWER✔✔b
b b b b




Which of the following small proteins could potentially form a quaternary structure with covalently bonded
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subunits?
b b




a.KLASTVLILWYSDHLEQGG b.TPMHNVAAEWQAIGHKR c.STAAYLKLFDPQILEVMSG b b




d.ASLLYWIPGSGKECVALN
b b




e.None of the above - CORRECT ANSWER✔✔d
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Describe the central dogma of genetics - CORRECT ANSWER✔✔Genes are made of DNA, expressed as an
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RNA intermediary that is decoded to make proteins
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, What is the difference between DNA and RNA - CORRECT ANSWER✔✔The sugar ring in RNA has an extra
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hydroxyl group that is missing in the pentose of DNA
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What is a gene - CORRECT ANSWER✔✔Discrete unit of inheritance
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what is an allele - CORRECT ANSWER✔✔Different forms of a gene
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What is a transformation - CORRECT ANSWER✔✔An alteration resulting from uptake or incorporation of a
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foreign DNA into a host cell
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What is a phenotype - CORRECT ANSWER✔✔Externally observable characteristic
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What is a genotype - CORRECT ANSWER✔✔Genetic characteristic(s)
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What are linkage groups - CORRECT ANSWER✔✔Alleles for different genes that are inherited jointly,
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rather than sorting independently; e.g. genes on the same chromosome
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What is antiparallel - CORRECT ANSWER✔✔Two adjacent polymer strands run in opposite directions
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What is complementarity - CORRECT ANSWER✔✔The property of double stranded DNA in which the
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sequence of one strand is fixed relative to the other due to base pairing
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Describe the difference between the fluid blending and discrete particle models of inheritance - CORRECT
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ANSWER✔✔In fluid blending, the offspring blend parental traits which are then inseparable by later
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generations while in discrete inheritance, the combined traits can be re-segregated and inherited
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separately by later generations.
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