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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
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b. the order of amino acids in the protein.
c. the poly-A tail.
d. the enzyme action of the ribosomes.
*e. the nucleotide sequence in DNA.
12. A crossover in meiosis is an exchange of genetic material between
a. sister chromatids of homologous chromosomes.
b. sister chromatids of the same chromosome.
c. non-sister chromatids of non-homologous chromosomes.
d. sister chromatids of non-homologous chromosomes.
*e. non-sister chromatids of homologous chromosomes.
13. In a eukaryote a protein that will be a receptor in the plasma
membrane or secreted will be synthesized
a. by DNA polymerase.
b. in the cytosol.
*c. in association with the RER.
d. by RNA polymerase.
e. in the nucleus.
14. During fertilization
a. many sperm cells fertilize each egg.
b. two sperm cells fertilize each egg.
c. two diploid cells combine to make one haploid cell.
*d. one sperm cell fertilizes one egg.
e. two diploid cells combine to make one tetraploid cell.
15. If the alleles for a characteristic passed from mothers to sons and
daughters, but never from fathers to sons or fathers to daughters, you
would predict that the gene
a. was located on the first chromosome.
b. was located on the DNA of the rough endoplasmic reticulum
(RER).
*c. was located on the DNA of the mitochondria.
d. was located on the third chromosome.
e. was inherited according to the laws of Mendel.
16. If a frameshift mutation causes a stop codon to be inserted into
the DNA sequence
a. the resulting protein will be too long, but still functional.
*b. the resulting protein will be too short and non-functional.
c. the phenotype will change but not the genotype.
d. the resulting protein will be too long and non-functional.
e. the resulting protein will not be affected.
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17. Unlike during mitosis, during meiosis homologous chromosomes
a. each have two sister chromatids.
b. are pulled on by microtubules.
*c. align with each other on a metaphase plate.
d. are replicated.
e. all end up in the same daughter cell.
18. Of the following enzymes, which acts first in the process of DNA
replication?
a. DNA polymerase
b. RNA polymerase
c. ligase
d. single-stranded DNA binding proteins
*e. primase
19. Assume Mendelian inheritance for this question. If you do not know
which trait is dominant and which is recessive, which of the following
are two reasonable predictions of fur color in the F
1
generation of a cross between a true-breeding brown and a true-breeding
black furred Labrador retriever?
a. one third brown, one third black and one third brownish-black
b. one quarter black or all black
c. half brown and half black, or all brown
d. half brown and half black, or all black
*e. all brown, or all black
20. The backbone of one strand of DNA is held together between the
nucleotides with
a. hydrogen bonds.
b. polypeptide bonds.
c. amino bonds.
*d. phosphodiester bonds.
e. nucleotide bonds.
21. Which characteristic of DNA allows each strand of the molecule to
act as a template that specifies the exact sequence of nucleotides in
the other strand?
*a. complementarity of the bases
b. complementarity of the pentose sugars
c. the two strands are antiparallel
d. the two strands are twisted into a double helix
e. the two strands are held together by hydrogen bonds between
the nitrogenous bases
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