Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology > Cell Cycle - Unit 4 > Flashcards

Cell Cycle - Unit 4 Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

What does DNA look like in the nucelus?

A

When a cell isn’t preparing to divide it looks loosely wound. This is called chromatin.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is chromatin?

A

Loosely wound DNA.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What happens to DNA when a cell divides?

A

DNA coils into packages called chromosomes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are chromosomes composed of?

A

DNA and protein histone molecules.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What do Histones do?

A

Histones help DNA by maintaining its shape, helping with compact storage, helping with organization, and it helps DNA be moved around easier.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

In a dividing cell what are the identical halves of chromosomes called?

A

They are called sister chromatids.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Where to sister chromatids connect?

A

Sister Chromatids connect at the centromere.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

True or False?

Each species has a characteristic number of chromosomes.

A

True.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the 3 key roles of Cell Division?

A
  1. Cell division allows for growth and repair in a multicellular organism
  2. Cell division in unicellular organisms is a method of reproduction
  3. Cell division also will allow a multicellular organism to develop from a single cell
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is Binary Fission?

A

Binary Fission is the mode of cell division for prokaryotes (Single celled organisms)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What happens is Binary Fission?

A

In Binary Fission prokaryotes reproduce by copying and separating its DNA then dividing in half.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is interphase?

A

Interphase is the time from one cell division to the next.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the 3 sub phases of Interphase?

A
  1. G’
  2. S
  3. G2
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is G0?

A

G0 is a phase cells go in when they exit the cell cycle. (resting phase)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

When does G1 occur?

A

G1 occurs right after cell division.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What happens in G1?

A

During G1 cells grow to their full size, they make new organelles, and the cell carries out normal activities.

17
Q

When does G0 occur?

A

G0 occurs after dividing.

18
Q

Do cells prepare to divide in G0?

A

No. But they continue with regular activities.

19
Q

Can G0 be reversible and irreversible?

A

Yes G0 can be reversible and irreversible depending on the type of cell.

20
Q

What happens during the S phase of Interphase?

A

DNA is replicated.

21
Q

What happens during the G2 phase of Interphase?

A

The cell prepares for replication by duplicating cell structures and having them move to the places they need to be for replication.

22
Q

What is the phase after interphase?

A

The M phase.

23
Q

How many stages does the M phase have and what are they?

A
  1. Mitosis

2. Cytokinesis

24
Q

What happens in Mitosis?

A

Division of nucleus.

25
Q

What happens in Cytokinesis?

A

The cytoplasm and cell membrane (and possibly cell wall) will divide to form two distinct cells.

26
Q

What are the phases of Mitosis? (PMAT)

A
  1. Prophase
  2. Metaphase
  3. Anaphase
  4. Telophase
27
Q

What 4 things happen during prophase?

A
  1. DNA condenses into chromosomes
  2. the nuclear envelope starts to disappear
  3. Centrosomes appear next to the nucleus
  4. Spindle fibers form between the centrosomes as they move towards the poles
28
Q

What happens during Metaphase?

A

Chromosomes are pulled by the mitotic spindle and line up in the center forming the equator or the metaphase plate.

29
Q

What happens during Anaphase?

A
  1. Chromosomes split at the centromere and become chromatids

2. Chromatids are pulled towards the poles

30
Q

When does Telophase begin?

A

Telophase begins when the chromatids reach the poles.

31
Q

What happens during Telophase?

A
  1. During telophase chromosomes uncoil and turn into chromatin
  2. The nuclear membrane and nucleolus reappear in each new cell
32
Q

What is a Cleavage Furrow?

A

A Cleavage Furrow is the dip when the cytoplasm is splitting. (Cytokinesis)

33
Q

How does cytokinesis work in plants?

A

Vesicles and the Golgi join together at the midline forming a new piece of cell wall.

Biology (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions