BIO 1511 - CH 11 MindTap/Self Assessment

G1

Which phase of interphase is characterized by a period of cell growth and the production of molecules for DNA replication?

Interphase

Which of the following is a not a stage of mitosis?

Metaphase

Anaphase

Prophase

Telophase

Interphase

mitosis, chromosome #

______ is a nuclear division mechanism that maintains the ________

Metaphase

During which stage of mitosis are the chromosomes aligned midway between the spindle poles?

Chromosomes pack tightly and become attached to a newly forming spindle

What occurs during the prophase stage of mitosis?

future plane of division, cell plate

During plant cell cytokinesis, a network of parallel microtubules condenses around the

_______. This becomes a site of expansion of the ______, which fuses with the plasma membrane and partitions the cytoplasm into two cells.

The mutations in oncogenes increase the activity or number of molecules that stimulate mitosis, leading to irregular cell division.

Which of the following demonstrates the link between oncogenes and cancer?

1, 3

Which of the following are characteristics of benign tumors? Select all that apply.

1. They stay in their home tissue.

2. They grow quickly.

3. They are slow growing.

4. They can migrate and grow in other tissues through metastasis.

Mutation in a tumor suppressor gene

Which of the following is NOT an example of fail-safe mechanisms that prevent the irregular cell divisions characteristic of cancer?

Shortening of telomeres

Triggered cell death

Mutation in a tumor suppressor gene

Cell division limit

S

Which phase of interphase is characterized by DNA replication?

The cell produces the proteins and cellular components needed for division.

Which of the following occurs during the G2 stage of interphase?

Telophase

In which stage of mitosis do the chromosomes reach opposite sides of the cells and a new nuclear envelope forms around each cluster of chromosomes?

Sister chromatids separate and move toward opposite spindle poles.

What occurs during the anaphase stage of mitosis?

A region of noncoding DNA at the end of a chromosome that protects coding sequences from degradation

Which of the following defines a telomere?

development and tissue repair in multicelled species

Mitosis and cytoplasmic division are the basis of

two

A duplicated chromosome has _____ chromatid(s)

are inherited from two parents

Homologous chromosomes

interphase

Most cells spend the majority of their lives in

centromere

The spindle attaches to chromosomes at the

interphase

Which is not a stage of mitosis?

gap

In intervals of interphase, G stands for

a cell grows and duplicates its DNA

Interphase is the part of the cell cycle when

the same as

After mitosis, the chromosome number of descendant cells is _____ the parent cell’s

cytokinesis

Cytoplasm of a plant cell divides by the process of

are checkpint genes, are proto-oncogenes, encode tumor suppressors

BRCA1 and BRCA2

malignant cells

are characteristic of cancer.

divides plant cells

cell plate function

made of microtubes

cell plate structure

lump of cells

tumor

indentation

cleavage furrow

made of microfilaments

contractile ring

dangerous metastatic cells

cancer

spindle originates here

centrosomes

shortens with age

telomere

chromosomes aligned midway between spindle poles

metaphase

chromosomes condense

prophase

new nuclei form

telophase

G1, 2, G2

interphase

sister chromatids move apart

anaphase

cytoplasmic division

cytokinesis