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
