Rio Salado BIO 156 Exam 2 || All Answers are Flawless.
Cell Cycle correct answers the collective series of intervals and events of a cells life, from the
time it forms until it divides.
What are the 4 intervals of interphase in the order they take place? correct answers G1, G0, S,
G2
What happens in interval G1? correct answers this is when the cell increases in size and produces
molecules required for DNA replication
From which interval would a cell possibly go into interval G0 and how long would it stay there?
What would it do there? correct answers if a cell decided to go to G0 it would be after interval
G1. Here it would just go about its metabolic business and not prepare to divide. It would stay
there temporarily or permanently. If it decided to leave, it would go back to G1 and then progress
on to interval S.
What happens in interval S? correct answers a cell copies it's chromosomes by DNA replication.
After this happens each chromosome consists of two molecules of DNA and they are attached as
sister chromatids.
What happens in interval G2? correct answers the cell produces proteins and other components
that are necessary for division.
Where does a cell go after interval G2 of interphase? correct answers mitosis
What do the built-in checkpoints do in interphase? correct answers they stop the cycle from
proceeding until certain conditions are met.
What divides first, the nucleus or the cytoplasm? correct answers Nucleus, then cytoplasm.
, What happens in mitosis? correct answers the nucleus divides.
What is cytokinesis? correct answers division of the cytoplasm
What is a centromere? correct answers The centromere holds the sister chromatids together
(made of protein)
What is the first stage of mitosis and what happens there? correct answers Prophase. The nuclear
envelope breaks up, the centrosomes split up to opposite sides of the cell, spindle microtubules
assemble and bind to chromosomes at the centromere. Think pro - pro at breaking up
What is a centrosome? correct answers microtubule organizing center. they contain two
centrioles.
What is the second stage of mitosis and what happens there? correct answers Metaphase. The
chromosomes line up in the middle of the cell. Think meta - meet in middle. The centrosomes are
still on opposite sides of the cell.
What is the third stage of mitosis and what happens there? correct answers Anaphase. This is
where the centrosomes reach out with their microtubules and take one of each sister chromatid.
There are now 4 chromosomes total. Think ana noooo
What do microtubules do? correct answers they are connected to the centrosomes and reach out
to collect one of each chromatid.
What is the last stage of mitosis and what happens there? correct answers Telophase. Now that
the chromosomes are all on opposite sides of the cell, they loosen up. Nuclear envelopes form
around each cluster of chromosomes and mitosis ends.
Chromosomes contain what? correct answers DNA and proteins
Cell Cycle correct answers the collective series of intervals and events of a cells life, from the
time it forms until it divides.
What are the 4 intervals of interphase in the order they take place? correct answers G1, G0, S,
G2
What happens in interval G1? correct answers this is when the cell increases in size and produces
molecules required for DNA replication
From which interval would a cell possibly go into interval G0 and how long would it stay there?
What would it do there? correct answers if a cell decided to go to G0 it would be after interval
G1. Here it would just go about its metabolic business and not prepare to divide. It would stay
there temporarily or permanently. If it decided to leave, it would go back to G1 and then progress
on to interval S.
What happens in interval S? correct answers a cell copies it's chromosomes by DNA replication.
After this happens each chromosome consists of two molecules of DNA and they are attached as
sister chromatids.
What happens in interval G2? correct answers the cell produces proteins and other components
that are necessary for division.
Where does a cell go after interval G2 of interphase? correct answers mitosis
What do the built-in checkpoints do in interphase? correct answers they stop the cycle from
proceeding until certain conditions are met.
What divides first, the nucleus or the cytoplasm? correct answers Nucleus, then cytoplasm.
, What happens in mitosis? correct answers the nucleus divides.
What is cytokinesis? correct answers division of the cytoplasm
What is a centromere? correct answers The centromere holds the sister chromatids together
(made of protein)
What is the first stage of mitosis and what happens there? correct answers Prophase. The nuclear
envelope breaks up, the centrosomes split up to opposite sides of the cell, spindle microtubules
assemble and bind to chromosomes at the centromere. Think pro - pro at breaking up
What is a centrosome? correct answers microtubule organizing center. they contain two
centrioles.
What is the second stage of mitosis and what happens there? correct answers Metaphase. The
chromosomes line up in the middle of the cell. Think meta - meet in middle. The centrosomes are
still on opposite sides of the cell.
What is the third stage of mitosis and what happens there? correct answers Anaphase. This is
where the centrosomes reach out with their microtubules and take one of each sister chromatid.
There are now 4 chromosomes total. Think ana noooo
What do microtubules do? correct answers they are connected to the centrosomes and reach out
to collect one of each chromatid.
What is the last stage of mitosis and what happens there? correct answers Telophase. Now that
the chromosomes are all on opposite sides of the cell, they loosen up. Nuclear envelopes form
around each cluster of chromosomes and mitosis ends.
Chromosomes contain what? correct answers DNA and proteins
