Ch. 10 (Textbook)

A diploid cell has_______ the number of
chromosomes as a haploid cell.
a. one-fourth
b. half
c. twice
d. four times

c. twice

An organism's traits are determined by the specific
combination of inherited _____.
a. cells.
b. genes.
c. proteins.
d. chromatids.

b. genes.

The first level of DNA organization in a eukaryotic
cell is maintained by which molecule?
a. cohesin
b. condensin
c. chromatin
d. histone

d. histone

Identical copies of chromatin held together by
cohesin at the centromere are called _____.
a. histones.
b. nucleosomes.
c. chromatin.
d. sister chromatids.

d. sister chromatids.

Chromosomes are duplicated during what stage of
the cell cycle?
a. G1 phase
b. S phase
c. prophase
d. prometaphase

b. S phase

Which of the following events does not occur
during some stages of interphase?
a. DNA duplication
b. organelle duplication
c. increase in cell size
d. separation of sister chromatids

d. separation of sister chromatids

The mitotic spindles arise from which cell
structure?
a. centromere
b. centrosome
c. kinetochore
d. cleavage furrow

b. centrosome

Attachment of the mitotic spindle fibers to the
kinetochores is a characteristic of which stage of
mitosis?
a. prophase
b. prometaphase
c. metaphase
d. anaphase

b. prometaphase

Unpacking of chromosomes and the formation of
a new nuclear envelope is a characteristic of which
stage of mitosis?
a. prometaphase
b. metaphase
c. anaphase
d. telophase

d. telophase

Separation of the sister chromatids is a
characteristic of which stage of mitosis?
a. prometaphase
b. metaphase
c. anaphase
d. telophase

c. anaphase

The chromosomes become visible under a light
microscope during which stage of mitosis?
a. prophase
b. prometaphase
c. metaphase
d. anaphase

a. prophase

The fusing of Golgi vesicles at the metaphase
plate of dividing plant cells forms what structure?
a. cell plate
b. actin ring
c. cleavage furrow
d. mitotic spindle

a. cell plate

At which of the cell-cycle checkpoints do external
forces have the greatest influence?
a. G1 checkpoint
b. G2 checkpoint
c. M checkpoint
d. G0 checkpoint

a. G1 checkpoint

What is the main prerequisite for clearance at the
G2 checkpoint?
a. cell has reached a sufficient size
b. an adequate stockpile of nucleotides
c. accurate and complete DNA replication
d. proper attachment of mitotic spindle fibers to
kinetochores

c. accurate and complete DNA replication

If the M checkpoint is not cleared, what stage of
mitosis will be blocked?
a. prophase
b. prometaphase
c. metaphase
d. anaphase

d. anaphase