Q1.Through a microscope, you can see a cell plate beginning to develop across the middle of the cell and nuclei re-forming at opposite poles of the cell. This cell is most likely
A) a plant cell in the process of cytokinesis.
B) a plant cell in metaphase.
C) an animal cell in the S phase of the cell cycle.
D) a bacterial cell dividing.
E) an animal cell in the process of cytokinesis.
Q2.Vinblastine is a standard chemotherapeutic drug used to treat cancer. Since it interferes with the assembly of microtubules, its effectiveness must be related to
A) disruption of mitotic spindle formation.
B) inhibition of regulatory protein phosphorylation.
C) inhibition of DNA synthesis.
D) suppression of cyclin production.
E) myosin denaturation and inhibition of cleavage furrow formation.
Q3.A particular cell has half as much DNA as some of the other cells in a mitotically active tissue. The cell in
question is most likely in
A) prophase.
B) G1
C) anaphase.
D) metaphase.
E) G2
Q4. In function, the plant cell structure that is analogous to an animal cell's cleavage furrow is the
A) centrosome.
B) cell plate.
C) chromosome.
D) spindle apparatus.
E) nucleus.
Q5. In some organisms, mitosis occurs without cytokinesis occurring. This will result in
A) cells that are unusually small.
B) destruction of chromosomes.
C) cells lacking nuclei.
D) cells with more than one nucleus.
E) cell cycles lacking an S phase.
Q6. Which of the following does not occur during mitosis?
A) separation of sister chromatids
B) spindle formation
C) replication of the DNA
D) separation of the centrosomes
E) packaging of the chromosomes
Q7. Asexual reproduction requires __________ individual(s).
A) 1
B) 2
C) 3
D) 0
E) 4
Q8. The genetic material is duplicated during
A) the S phase.
B) mitosis.
C) G1
D) G2
E) the mitotic phase.
Q9. Chromosomes are aligned along the cell's equator during
A) anaphase.
B) prophase.
C) prometaphase.
D) metaphase.
E) interphase.
Q10. The absence of __________ would result in a single cell with two nuclei.
A) cytokinesis
B) interphase
C) anaphase
D) prometaphase
E) prophase
Q11.G protein is inactivated when
A) GTP displaces GDP on the G protein.
B) its two parts join.
C) it phosphorylates its steroid signal molecule.
D) a signal molecule changes its shape, closing its ion channel.
E) it hydrolyzes its GTP to GDP.
Q12. G protein is activated when __________ attaches to it.
A) ATP
B) cyclic AMP
C) GDP
D) GTP
E) protein kinase
.
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