Practice Quiz - Chapter 9

Starting with a fertilized egg (zygote), how many cells would be present after 3 rounds of mitosis?

8

A cell that is not actively dividing (post-mitotic) is in which phase?

G0

Most of the cells in your body are in _____ phase.

G0

Which phase follows S phase?

G2

growth factor

a secreted protein that stimulates other cells to divide

Chromosomes

a single molecule of DNA packaged with proteins

Select all that apply to a prokaryotic genome.

a single, double-stranded DNA molecule a single chromosome a circular chromosome

gene

a unit of DNA that codes for a spefic protein

genome

all of a cell's DNA

When a normal cell has too much DNA damage to pass the G1 checkpoint, and the damage cannot be repaired, what will happen?

apoptosis

A dividing cell duplicates its DNA:

before mitosis

Bacteria divide by

binary fission

Zygote

cell resulting from the union of egg and sperm

A metabolically active cell will have DNA in the chromatin form, while a cell in mitosis will have DNA in the condensed form.

chromatin /// condensed

angiogenesis

formation of new blood vessels

Which of the following statements correctly describe mitosis?

it produces 2 diploid cells from 1 diploid cell it is used for asexual reproduction it makes an exact genetic copy it is used to replicate cells for growth and development

The spindle is composed of:

microtubules

G1

the cell is accumulating the building blocks of DNA and proteins and accumulating energy reserves for DNA duplication

G2

the cell makes proteins needed for division, duplicates some organelles and reorganizes the cytoplasm

Select ALL of the events that happen in telophase.

the chromosomes uncoil to chromatin nuclear envelopes form around the daughter nuclei cytokinesis happens concurrently

Mitosis

the duplicated chromosomes are separated and the cell divides

Select ALL of the events that happen in prophase.

the mitotic spindle begins to form the chromosomes condense

Select all of the statements that describe a cell in G2 phase.

the nucleus is surrounded by a nuclear envelope chromosomes are in the chromatin state chromosomes are already duplicated the cell is growing and translating proteins

Mitosis results in:

two genetically identical daughter cells

cancer

uncontrollable growth of abnormal cells

apoptosis

programmed cell death

DNA replication takes place during which phase?

s

A duplicated chromosome consists of two chromosomes , which are held together by a ______

sister chromatid ////centromere

metastasis

spread of cancer cells to a non-adjacent organ or tissue

S

the cell duplicates its chromosomes

Apoptosis is a normal event in growth and in the adult organism

True

locus

a location on a chromosome

Select ALL of the events that happen in anaphase.

the sister chromatids are pulled apart from one another