Download CH 10-12 Practice Test Answer Section

CH 10-12 Practice Test
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1. Nuclear pore complexes allow RNA transcripts to pass to the cytoplasm only when the transcripts
a. are bound to specific proteins.
b. are small enough.
c. are attached to fat soluble molecules.
d. contain specific introns.
e. are attached to ribosome subunits manufactured in the nucleus.
____
2. The conversion of proteins by the removal of a portion of polypeptide chain is an example of
a. transcriptional control.
b. transcript processing control.
c. transport control.
d. translational control.
e. post-translational control.
____
3. The rate at which mRNA is processed by ribosomes is an example of
a. transcriptional control.
b. transcript processing control.
c. transport control.
d. translational control.
e. post-translational control.
____
4. In the ABC model of flower development in Arabidopsis thaliana, sepals form when gene(s) ____ is(are)
switched on.
a. A
b. A and B
c. B and C
d. C
e. A and B and C
____
5. Mutation of the A group gene in Arabidopsis thaliana affects development in its flower's
a. first whorl only.
b. second whorl only.
c. third whorl only.
d. first and second whorls.
e. second and third whorls.
____
6. Mutation of the B group gene in Arabidopsis thaliana affects development in its flower's
a. first whorl only.
b. second whorl only.
c. third whorl only.
d. first and second whorls.
e. second and third whorls.
____
7. Mutation of the C group gene in Arabidopsis thaliana produces flowers that
a. are sterile.
b. have no carpels.
c. have no stamens.
d. have a profusion of petals.
e. are all of these.
____
8. The promotion of the lactose operon in bacteria is
a. activated by a repressor protein.
b. independent of glucose concentration.
c. activated by lactose binding.
d. regulated by RNA polymerase.
e. none of these.
____
9. Which of the following is NOT an example of the results of mitosis?
a. a pair of identical twins
b. a group of rooted plant cuttings from a single plant
c. the cells produced by the asexual reproduction of a single-celled organism
d. production of a gamete
e. healing of a wound
____ 10. Which process is absolutely necessary for asexual cellular reproduction to occur in eukaryotes?
a. prokaryotic fission
b. mitosis
c. meiosis
d. cytokinesis
e. growth factor activation
____ 11. Which of the following statements is TRUE?
a. Once a person reaches maturity, cell division stops except to repair wounds.
b. Cell division in an adult signifies cancer.
c. Some specific cells throughout the body retain the ability to divide and replace
themselves.
d. Growth continues throughout the life of an adult human.
e. All cells retain the ability to divide even after the organism reaches maturity.
____ 12. The above figure reveals which of the following about the organism that it was obtained from?
a. Genes present
b. Age
c. Deceased or living
d. Total number of genes
e. Number of homologous pairs
____ 13. Which of the following statements is TRUE?
a. Each new cell receives half of the number of chromosomes in the original cell.
b. Each new cell receives copies of all the original chromosomes.
c. If the original number of chromosomes was 46, each new cell will have 23.
d. The sister chromosomes are not identical due to breakages in the DNA.
e. All chromosomes are duplicated except the sex chromosomes.
____ 14. Which of the following four statements is NOT true?
a. The location of the centromere is unique for each chromosome.
b. Some spindle fibers become attached to kinetochores.
c. The spindle apparatus is composed of protein molecules of tubulin.
d. Some microtubules overlap at the spindle equator.
e. All of these are true.
____ 15. Mitosis comes from the Greek word "mitos," which means
a. divide.
b. grow.
c. swell.
d. thread.
e. shrink.
____ 16. Which of the following statements is false?
a. Chromosomes do not pair during mitosis.
b. Genes and chromosomes are duplicated during prophase.
c. Each species has a specific number of chromosomes.
d. New nuclei are formed during telophase.
e. A diploid cell will produce two diploid daughter cells by mitosis.
____ 17. Which of the following is the proper sequence for mitosis?
I.
metaphase
II.
telophase
III.
prophase
IV.
anaphase
a.
b.
c.
d.
e.
I, III, IV, II
I, II, III, IV
III, I, IV, II
IV, I, III, II
III, IV, I, II
____ 18. Cytoplasmic division in animal cells involves all EXCEPT
a. formation of a cell plate.
b. a contractile ring mechanism.
c. a deepening cleavage furrow.
d. a ring of actin filaments under the plasma membrane at the equator.
e. ATP.
____ 19. This illustration shows
a. cytoplasmic division in an animal cell.
b. a contractile ring mechanism.
c. how chromosomes are dragged to the poles.
d. cytoplasmic division in an animal cell and a contractile ring mechanism.
e. cytoplasmic division in an animal cell and how chromosomes are dragged to the poles.
____ 20. Which characteristic seems to be most uniquely correlated with metastasis?
a. loss of nuclear-cytoplasmic controls governing cell growth and division
b. changes in adhesion proteins on membrane surfaces
c. shrinkage of the cytoskeleton
d. increase in blood supply to the tumor
e. none of these
____ 21. Which of the following statements is false?
a. Checkpoint gene products that inhibit mitosis are called proto-oncogenes.
b. Metastasis is the invasion of cancer cells into normal tissue.
c. Malignant tumors differ from benign tumors in that their cells migrate.
d. Cancer cells have lost the ability to stop dividing.
e. The parent cell that started a cancer may have undergone a checkpoint gene mutation.
____ 22. Anaphase
a. involves the lining up of the chromosomes across the equatorial plate.
b. is the same in mitosis and meiosis I and II.
c. is initiated when the chromosomes begin to move apart.
d. results in an unequal distribution of chromosomes to the resulting cells.
e. does all of these.
____ 23. Paired homologous chromosomes are found at the spindle equator during
a. metaphase I.
b. telophase I.
c. prophase II.
d. metaphase II.
e. anaphase II.
____ 24. Crossing over is one of the most important events in meiosis because
a. it produces new combinations of alleles on chromosomes.
b. homologous chromosomes must be separated into different daughter cells.
c. the number of chromosomes allotted to each daughter cell must be halved.
d. homologous chromatids must be separated into different daughter cells.
e. all of these reasons are true.
____ 25. There are ____ molecules of DNA in a developing human sperm cell at the beginning of prophase I.
a. 92
b.
c.
d.
e.
23
46
half as many (as compared to somatic cells)
twice as many (as compared to mature sperm)
____ 26. Major gene reshuffling takes place during
a. telophase I.
b. metaphase I.
c. anaphase I.
d. metaphase II.
e. anaphase II.
____ 27. Crossing over
a. increases variability in gametes.
b. happens only once per homologue pair.
c. occurs between sister chromatids.
d. prevents genetic recombination.
e. is followed immediately by separation of each of the chromatids.
____ 28. If a child more strongly resembles one parent's physical traits than the other parent's, the explanation could be
due to chromosome movements during
a. anaphase II.
b. metaphase II.
c. prophase II.
d. anaphase I.
e. telophase I.
____ 29. Which of the following is TRUE at the end of telophase I in corn (20 chromosomes)?
a. Each cell has 10 chromosomes.
b. Each chromosome is double-stranded.
c. Centromeres connect sister chromatids.
d. Each cell has 10 chromosomes, and each chromosome is double-stranded.
e. Each cell has 10 chromosomes, each chromosome is double-stranded, and centromeres
connect sister chromatids.
____ 30. If a diploid organism has a genome consisting of 4 pairs of chromosomes, it can produce ____ different
combinations of maternal and paternal chromosomes (disregarding crossing over).
a. 4
b. 8
c. 12
d. 16
e. 32
____ 31. The illustration shows one possible outcome of the random alignment of homologous chromosomes at
metaphase I. How many other possible arrangements exist?
a. 0
b. 1
c. 2
d. 3
e. 4
____ 32. Chromosome segregation in metaphase I refers to which of the following statements?
a. The position where crossing over occurs is random.
b. The pole that any one chromosome moves toward is completely independent of the
movement of the other 45 chromosomes in humans.
c. Either partner of a homologous pair of chromosomes may end up at either spindle pole.
d. The sperm that fertilizes the egg is selected at random.
e. None of these refer to independent assortment.
____ 33. Which of the following is NOT true of human chromosomes?
a. The haploid number is 23.
b. The diploid number is 46.
c. There are 23 pairs of chromosomes.
d. Human gametes end up with two of each type of 23 chromosomes.
e. Human gametes end up with one of each type of 23 chromosomes.
____ 34. Polar bodies
a. are dumping places for excess genetic material.
b. have no known biological function.
c. are produced by meiosis.
d. will serve as the gametes if something happens to the egg.
e. all of these are true EXCEPT "will serve as the gametes if something happens to the egg."
____ 35. In plants, which of the following cells is(are) diploid?
a. egg
b. sperm
c. spore
d. leaf cell
e. spore and leaf cell
____ 36. Which of the following does NOT produce variation?
a. crossing over
b. random alignment of chromosomes during meiosis
c. asexual reproduction
d. genetic recombination of alleles
e. sexual reproduction
____ 37. In comparing mitosis and meiosis, which of the following statements is true?
a. Meiosis I is more like mitosis than is meiosis II.
b. Both processes result in four cells.
c. Pairing of homologues occurs in both.
d. Chromatids are present only in mitosis.
e. Meiosis II resembles mitosis.
CH 10-12 Practice Test
Answer Section
MULTIPLE CHOICE
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17. ANS:
A
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension
SWITCHING GENES ON AND OFF
E
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension
SWITCHING GENES ON AND OFF
D
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Knowledge
SWITCHING GENES ON AND OFF
A
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension | Bloom's Taxonomy: Evaluation
EXAMPLES OF GENE CONTROL IN EUKARYOTES
D
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Application
EXAMPLES OF GENE CONTROL IN EUKARYOTES
E
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Application
EXAMPLES OF GENE CONTROL IN EUKARYOTES
E
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Application
EXAMPLES OF GENE CONTROL IN EUKARYOTES
C
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension
EXAMPLES OF GENE CONTROL IN PROKARYOTES
D
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension | Bloom's Taxonomy: Analysis
MULTIPLICATION BY DIVISION
B
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Analysis
MULTIPLICATION BY DIVISION
C
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension | Bloom's Taxonomy: Analysis
MULTIPLICATION BY DIVISION
E
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Application | Bloom's Taxonomy: Evaluation
MULTIPLICATION BY DIVISION
B
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension | Bloom's Taxonomy: Analysis
MULTIPLICATION BY DIVISION
E
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension | Bloom's Taxonomy: Analysis
A CLOSER LOOK AT MITOSIS
D
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Knowledge
A CLOSER LOOK AT MITOSIS
B
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension | Bloom's Taxonomy: Analysis
A CLOSER LOOK AT MITOSIS
C
PTS: 1
DIF: Difficult
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Bloom's Taxonomy: Synthesis | Bloom's Taxonomy: Application
A CLOSER LOOK AT MITOSIS
A
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension | Bloom's Taxonomy: Analysis
CYTOKINESIS: DIVISION OF CYTOPLASM
D
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension | Bloom's Taxonomy: Evaluation
CYTOKINESIS: DIVISION OF CYTOPLASM
B
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Analysis | Bloom's Taxonomy: Evaluation
WHEN MITOSIS BECOMES PATHOLOGICAL
A
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension | Bloom's Taxonomy: Evaluation
WHEN MITOSIS BECOMES PATHOLOGICAL
C
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Knowledge
HOW MEIOSIS INTRODUCES VARIATION IN TRAITS
A
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Knowledge
HOW MEIOSIS INTRODUCES VARIATION IN TRAITS
A
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension
HOW MEIOSIS INTRODUCES VARIATION IN TRAITS
A
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Knowledge
HOW MEIOSIS INTRODUCES VARIATION IN TRAITS
B
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Knowledge
HOW MEIOSIS INTRODUCES VARIATION IN TRAITS
A
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Knowledge
HOW MEIOSIS INTRODUCES VARIATION IN TRAITS
D
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension
HOW MEIOSIS INTRODUCES VARIATION IN TRAITS
E
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Evaluation
HOW MEIOSIS INTRODUCES VARIATION IN TRAITS
D
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension | Bloom's Taxonomy: Application
HOW MEIOSIS INTRODUCES VARIATION IN TRAITS
D
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Application | Bloom's Taxonomy: Synthesis
HOW MEIOSIS INTRODUCES VARIATION IN TRAITS
C
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Knowledge
HOW MEIOSIS INTRODUCES VARIATION IN TRAITS
D
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension | Bloom's Taxonomy: Analysis
FROM GAMETES TO OFFSPRING
E
PTS: 1
DIF: Difficult
Bloom's Taxonomy: Comprehension
FROM GAMETES TO OFFSPRING
D
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Knowledge
FROM GAMETES TO OFFSPRING
C
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Analysis
TOP: MEIOSIS AND MITOSIS--AN ANCESTRAL CONNECTION?
37. ANS: E
PTS: 1
DIF: Difficult
OBJ: Bloom's Taxonomy: Analysis
TOP: MEIOSIS AND MITOSIS--AN ANCESTRAL CONNECTION?