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BIOA01H3 Study Guide - Midterm Guide: Bacterial Conjugation, Sister Chromatids, G2 Phase

Biological Sciences
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term test module two
chapter nine
1. during the cell cycle, the na mass of a cell
a. decreases during g1 phase
b. decreases during metaphase
c. increases during the s phase
d. increases during g2 phase
e. decreases during interphase
2. honeybee eggs that are not fertilized develop into fertile haploid males called
'drones'. fertilized eggs can develop into diploid females, one of which might
because a 'queen'. (fertilized eggs might also become males, but they are
taken out and killed by the drones)
if the queen has 32 chromosomes in her body cells, how many
chromatids would be present in a g2 drone cell?
a. 8
b. 16
c. 24
d. 32
e. 64
3. the major microtubule organizing centre of the animal cell is
a. chromosomes, composed of chromatids
b. the centrosome, composed of centrioles
c. the chromatin, composed of chromatids
d. chromosomes, composed of centromere
e. centrioles, composed of centrosome
4. for a given cell, the number of _________ is higher at the end of s phase than
at the beginning.
a. nuclei
b. chromatids
c. chromosomes
d. CDK2 molecules
e. both b and c are correct
5. which of the following statements about mitosis is incorrect?
a. microtubules can bind to kinetochores and interact with other microtubules
from opposite poles
b. in anaphase, the spindle separates sister chromatids and pulls them apart
c. chromosomes congregate near the centre of the cell during metaphase.
d. cytokinesis describes the movement of chromosomes
e. both the animal cell furrow and the plant cell plate form at their former
spindle midpoints

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6. in bacteria.
a. several chromosomes undergo mitosis
b. binary fission produces four daughter cells
c. replication begins at the ori and the dna strand separates
d. replication occurs in the same direction off each opposite strand
e. the daughter cells receive different genetic information from the parent
chapter ten
7. if recombination occurred between bacteria as shown in the figure, the result
would be (page 226 Q#1)
a. Mhv and mhV
b. MHV and mhv
c. Mhv and mHv
d. MHV and mhV
e. mhv and MhV
8. which of the following is not correct for bacterial conjugation?
a. both Hfr and F+ bacteria have the ability to code for a sex pilus
b. after an f- cell has conjugated with an f+, its plasmid holds the f+ factor
c. the recipient cell usually becomes Hfr following conjugation
d. in an Hfr x F- mating, dna of the main chromosome moves to a recipient
e. genes on the f factor encode proteins of the sex pilus.
9. which of the following is not correct for bacterial transformation?
a. artifical tranformation is used in cloning procedures.
b. avery was able to tranform live noninfective bacteria with dna from dead
infective bacteria
c. the cell wall and plasma membrane must be penetrated for tranformation
to proceed
d. a virus is required for the process
e. electroporation is a form of artificial tranformation used to introduce dna
into cells
10. transduction
a. may allow recombination of newly introduced dna with host cell dna
b. is the movement of dna from one bacterial cell to another by means of a
c. can cause the dna of the donor to change but not the dna of the recipient
d. is the movement of viral dna but not bacterial dna into a recipient
e. requires physical contact between the two bacterium
11. the diploid number of this individual is 6 (see page 227 Q#6)
(three maternal chromosomes and their paternal homologues lined up in the

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this figure represents:
a. mitotic metaphase
b. meiotic metaphase I
c. meiotic metaphase II
d. a gamete
e. six nonhomolgous chromosomes
12. chiasmata
a. form during metaphase II of meiosis
b. occur between two nonhomologous chromosomes.
c. represent chromosomes independently assorting
d. are sites of dna exchange between homologous chromatids
e. ensure that the resulting cells are identical to the parent cell
13. if 2n is four, the number of possible combinations in the resulting
gametes is
a. 1
b. 2
c. 4
d. 8
e. 16
14. the number of human chromosomes in a cell in prophase I of meiosis is
____ and in telophase II is _____.
a. 92; 46
b. 46; 23
c. 23; 23
d. 23; 16
e. 4; 2
15. the dna content in a diploid cell in g2 is x. if that cell goes into meiosis
at its metaphase II, the dna content would be
a. 0.1x
b. 0.5x
c. x
d. 2x
e. 4x
chapter eleven
16. the dominant C allele of a gene that controls color in corn produces
kernels with colors; plants homozygous for a recessive c allele of this gene
have colorless or white kernels. what kinds of gametes, and in what
proportions, would be produced by the plants in the following crosses? what
seed color and in what proportions would be expected in the offspring of the
a. CC x Cc
b. Cc x Cc
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