BIOS 1700 BIOLOGICAL SCIENCES I: MOLECULES AND
CELLS UPDATED ACTUAL EXAM GRADED A+
1. How must spindle microtubules attach to chromosomes during anaphase of meiosis I?
a. microtubules attach using their minus (slow growing) ends
b. microtubules attach to the chiasma
c. microtubules attach at the centrosomes
d. microtubules only attach to one kinetochore per homologous pair
2. The point at which DNA synthesis is initiated is called the:
a. start codon
b. primer
c. replication fork
d. origin of replication
3. The process of cell division in a prokaryotic cell is called:
a. mitosis
b. binary fission
c. cytokinesis
4. moves outward from the origin of replication and breaks hydrogen bonds between
DNA nucleotides.
a. DNA polymerase
b. helicase
c. RNA primase
5. What motor proteins are responsible for the activity of the contractile ring during cytokinesis in
animal cells?
a. dynein
b. kinesin
c. myosin
6. In which phase of mitosis do chromosomes condense?
a. prophase
b. anaphase
c. metaphase
d. telophase
7. Why are telomeres a necessary component of linear chromosomes?
a. they direct where DNA synthesis will begin
b. they fix mistakes that are made during DNA replication
c. they extend the life of cells because DNA is shortened every time it is
replicated
, 8. Replication of DNA in a eukaryote occurs during which phase of the cell cycle?
a. M phase
b. G1 phase
c. G2 phase
d. S phase
9. A cell that is not actively dividing is in what phase of the cell cycle?
a. G1
b. G0
c. G null
d. G2
10. When do sister chromatids separate in meiosis?
a. telophase I
b. anaphase II
c. anaphase I
d. metaphase II
11. What is the benefit of using Taq polymerase in PCR?
a. because it is taken from bacteria with a circular DNA molecule, the DNA
molecule doesn’t shorten during PCR
b. because it is taken from bacteria, this enzyme works much quicker than other types of
DNA polymerase
c. because it is taken from bacteria that lives in high temperatures , it does not
denature and more DNA polymerase does not have to be added after every cycle
d. because it is taken from bacteria, it makes fewer mistakes
12. Synapsis is best described as:
a. the alignment of homologous chromosomes in prophase I
b. the exchange of genetic information between non sister chromatids
c. the exchange of genetic information between sister chromatids
d. the alignment of non-sister chromatids at the metaphase plate
13. What properties are associated with a malignant cancer?
a. it is fast-growing
b. it invades surrounding tissue
c. it is metastatic
d. all of the above
14. Which of the following enzymes is responsible for initiating the proofreading repair
mechanism?
a. DNA ligase
b. DNA polymerase
c. RNA primase
d. Helicase
15. Which of the following is not a step in the process of binary fission?
a. DNA replicates
b. formation of a new cell wall
c. rearrangement of the microtubule cytoskeleton
d. elongation of the cell
CELLS UPDATED ACTUAL EXAM GRADED A+
1. How must spindle microtubules attach to chromosomes during anaphase of meiosis I?
a. microtubules attach using their minus (slow growing) ends
b. microtubules attach to the chiasma
c. microtubules attach at the centrosomes
d. microtubules only attach to one kinetochore per homologous pair
2. The point at which DNA synthesis is initiated is called the:
a. start codon
b. primer
c. replication fork
d. origin of replication
3. The process of cell division in a prokaryotic cell is called:
a. mitosis
b. binary fission
c. cytokinesis
4. moves outward from the origin of replication and breaks hydrogen bonds between
DNA nucleotides.
a. DNA polymerase
b. helicase
c. RNA primase
5. What motor proteins are responsible for the activity of the contractile ring during cytokinesis in
animal cells?
a. dynein
b. kinesin
c. myosin
6. In which phase of mitosis do chromosomes condense?
a. prophase
b. anaphase
c. metaphase
d. telophase
7. Why are telomeres a necessary component of linear chromosomes?
a. they direct where DNA synthesis will begin
b. they fix mistakes that are made during DNA replication
c. they extend the life of cells because DNA is shortened every time it is
replicated
, 8. Replication of DNA in a eukaryote occurs during which phase of the cell cycle?
a. M phase
b. G1 phase
c. G2 phase
d. S phase
9. A cell that is not actively dividing is in what phase of the cell cycle?
a. G1
b. G0
c. G null
d. G2
10. When do sister chromatids separate in meiosis?
a. telophase I
b. anaphase II
c. anaphase I
d. metaphase II
11. What is the benefit of using Taq polymerase in PCR?
a. because it is taken from bacteria with a circular DNA molecule, the DNA
molecule doesn’t shorten during PCR
b. because it is taken from bacteria, this enzyme works much quicker than other types of
DNA polymerase
c. because it is taken from bacteria that lives in high temperatures , it does not
denature and more DNA polymerase does not have to be added after every cycle
d. because it is taken from bacteria, it makes fewer mistakes
12. Synapsis is best described as:
a. the alignment of homologous chromosomes in prophase I
b. the exchange of genetic information between non sister chromatids
c. the exchange of genetic information between sister chromatids
d. the alignment of non-sister chromatids at the metaphase plate
13. What properties are associated with a malignant cancer?
a. it is fast-growing
b. it invades surrounding tissue
c. it is metastatic
d. all of the above
14. Which of the following enzymes is responsible for initiating the proofreading repair
mechanism?
a. DNA ligase
b. DNA polymerase
c. RNA primase
d. Helicase
15. Which of the following is not a step in the process of binary fission?
a. DNA replicates
b. formation of a new cell wall
c. rearrangement of the microtubule cytoskeleton
d. elongation of the cell
