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Bio1510W12 Exam 4 w ans v w.wiz.doc
Bio1510W12_Exam_4_w_ans_v_w.wiz.doc
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Bio1510W12 Exam 4 w ans v w.wiz.doc-A non-Mendelia...
Bio1510W12_Exam_4_w_ans_v_w.wiz.doc-A non-Mendelian pleiotropic gene *a. affects
Bio1510W12 Exam 4 w ans v w.wiz.doc...
Bio1510W12_Exam_4_w_ans_v_w.wiz.doc-A non-Mendelian pleiotropic gene *a. affects
Page 7
*d. has a 5’ end and a 3’ end.
e. makes a chromosome.
32. Which of the following is a protein that is essential for cells to
replicate DNA that is also used in laboratories for polymerase chain
reaction (PCR) experiments?
*a. DNA polymerase
b. helicase
c. RNA polymerase
d. ligase
e. gel electrophoresis
33. Assume Mendelian inheritance for this question. You cross an
organism with the dominant phenotype and unknown genotype with a
recessive organism for a particular characteristic. If the unknown
genotype of that characteristic is homozygous, you would predict that
the offspring would be
a. ¾ recessive and ¼ dominant phenotypes.
b. all recessive phenotypes.
c. ¼ recessive and ¾ dominant phenotypes.
d. all dominant phenotypes.
*e. half recessive and half dominant phenotypes.
34. In non-Mendelian polygenic inheritance
a. the phenotype for more than one characteristic is affected by
one gene.
b. a trait has a gene with more than two alleles.
c. there is a different allele on each homologous chromosome.
d. there are the same alleles on the homologous chromosomes.
*e. a phenotype is affected by more than one gene.
35. Codons
a. are found on tRNA and make hydrogen bonds with amino acids.
b. are found on snRNPs and make covalent bonds with amino acids.
*c. are found on mRNA and make hydrogen bonds with tRNA.
d. are found on DNA and make covalent bonds with tRNA.
e. are found on proteins and make hydrogen bonds with amino
acids.
36. Which of these events occurs as a prokaryotic mRNA is being
transcribed?
a. More than one of the other choices is correct.
b. addition of a poly-A tail
c. addition of a G cap
Page 8
*d. binding of ribosomes and translation
e. splicing
37. What would happen if a growth factor receptor were mutated so that
it was active (functioned as if it were bound to the growth factor
permanently) even if there was no growth factor present?
*a. The cells would divide more frequently than usual.
b. The cells would stop at the G1 checkpoint.
c. The cells would never divide.
d. The cells would divide into haploid cells instead of diploid
cells.
e. The cells would divide normally.
38. Assume Mendelian inheritance for this question. You have 1000
plants in an
F
1
generation from a monohybrid cross of a true-breeding
dominant yellow-pea plant to a true-breeding recessive green-pea plant.
How many of the
F
1
plants would you predict have a yellow-pea
phenotype?
*a. 1000
b. none
c. 500
d. 750
e. 250
39. During anaphase II of meiosis the _________ separate from each
other.
a. nuclei
b. spindles
c. metaphase plates
d. homologous chromosomes
*e. sister chromatids
40. When RNA polymerase synthesizes RNA from the DNA template it is
*a. transcription.
b. replication.
c. mutation.
d. segregation.
e. translation.
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