Cell Growth and Division

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The genetic material is duplicated during which phase?

S phase

Sister chromatids are...

tightly linked together at a centromere

Prior to M phase the cell makes final preparations during...

G2

The cell carries out most of its growth during

G1

These make up the interphase

A, B, and C, (G1, S, and G2)

It is important that cells remain small. Which is the reason for this?

two of the above

Which of the statements regaurding cell division are FALSE?

Cell division is common in Eukaryotes and rare in Prokaryotes

Eukaryotic Chromosomes differ from Prokaryotic Chromosomes in that they...

are housed in a membrane-enclosed nucleus

Which is a feature of plant cell division that distinguishes it form animal cell division?

formation of a cell plate

Prior to mitosis, each chromosome of a eukaryotic cell consists of a pair of identical structures called....

sister chromatids

The phase of mitosis during which the nuclear envalope fragments and the nucleoli disappear is called...

prophase

At the start of miotic anaphase....

the centromeres of each chromosome come appart

The process by which the cytoplasm of a eukaryotic cell divides to produce two cells is called...

cytokinesis

During which phase of mitosis do the chromosomes align in the center of the cell?

metaphase

During which phase of mitosisdoes the nuclear envalope re-formand the nucleoli reappear?

Telophase

p53 is a gene that produces products that halt the cycle until all DNA is replicated. The protein product could be active during the __________ Trannsition.

G2 to M-phase (G2 Checkpoint)

Molecular factors tha tinfluence the cell cycle are...

all of the above

Mature human nerve cells and muscle cells

are in G0

Which molecules from the molecular basis of the internal cell cycle control system?

cyclins

When animal cells are grown in a petri dish, they typically stop dividing onece they have formed a single, unbroken layer on the bottom of the dish. this arrest of division is an example of...

density-dependent inhibition

p53 is a gene that produces products that halt the cell cycle until all DNA is replicated. The could result in

all or the above

Which must occur for a plant or animal to grow and develope normally?

the organism mus be anble to control timing and rate of cell division in different parts of its body

A ___________ is the time during which the cell will not go forward until a certain sicnal is recieved.

checkpoint

The Metaphast to Anaphase Transtion (M Checkpoint) is controlled by ......

unattached kinetochores

The "go ahead" signal for the G2 to M-phase Transition (G2 Checkpoint) is/are called

maturation promoting factor

Which of the following statements regaurding mitosis and meiosis is false?

meiosis provides for asexual reproduction

Independent orientation of chromosomes at metaphase I and random fertilization are most like....

shuffling cards and dealing out hands of Go Fish

During which stage of meiosis are chiasmata visible?

late prophase I

During which stage of meiosis do sister chromatids separate?

anaphase II

Which statement regauring the difference between mitosis and meiosis is false?

crossing over is a phenomenon that creates genetic diversity during mitosis

During which stage of meiosis do chromosomes move toward the metaohase plate?

prophase II

Which of the following statements is false?

Gametes are made by mitosis

Which of the following options correctly describes the behavior of a tetrad during anaphase I of meiosis?

it splits into two pairs of sister chromatids, and one pair goes to each pole of the dividing cell

Both mitosis and meiosis are precedes by

interphase

During which stage of meiosis does synapsis and the formation of tetrads occur?

prophase I

If a chromosome fragment breaks off and then reattaches to the original chromosome, but in reverse direction, the resulting chromosomal abnormality is called a(n)

inversion

Cancer is not usually inherited because....

the chromosomal changes in cancer are usually confined to somatic cells

Nondisjunction occurs when...

members of a chromosoma pair fail to separate

Which of the following variations of the sentence "Where is the cat" is most like a chromosomal deletion?

where is cat?

Which of the following variations of the sentence "Where is the cat" is most like a chromosomal inversion?

Where the is cat?

Which is the result of nondisjunction during meiosis I?

n+1; n+1; n-1; n-1

Which of the statements about nondisjunction is false?

in mammals, extra Y chromosomes are typically inactivated

Which of the following variations of the sentence "Where is the cat" is most like a chromosomal duplication?

Where is the the cat?

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