Brainscape's Knowledge GenomeTM

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


See full index

Science 9 > Chaptre 5 > Flashcards

Chaptre 5 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
0
Q

When does you cells get replaced?

A

They continue to divide and reproduce all throughout your life

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

How many stages are there in the cell cycle?

A

Three

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

The cells that take the most wear and tear produce and divide?

A

Moved than Cells that take less

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

What are the three stages of the cell cycle?

A

Interphase, mitosis, cytokinesis

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

What is interphase?

A

The stage in which cells carry out the functions necessary for survival and cells that divides prepare for reproduction.

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

How many sub stages are their in interphase. What are there names.

A

Growth and reproduction, DNA replication, continued growth and preparation.

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

What is mitosis?

A

Mitosis divides the duplicated contents of the cell nucleus into two equal parts.

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

Cytokinesis?

A

Separates the two nuclei and cell contents into two daughters cells

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

What is the longest stage in the cell cycle

A

Interphase

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

Where does interphase carry out its function?

A

Inside the cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

When do most of the cells contents get eaten?

A

During interphase

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

What happens during growth and preparation?

A

A cell increases in size and makes proteins and molecules necessary for everyday life and fourths cell to function. Some organelle begin to duplicate.

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

What happens during replication?

A

DNA copies or makes replica of its self. During replication the cell copies 3 million base pairs of DNA information in the nucleus of the cell. Then the cell temporarily has two complete sets of DNA, enzymes control this process. To replicate its self the DNA molecule unwinds and steps of the ladder break apart. Each side becomes a template for the new side to form.

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

What’s happens during continued growth and preparation?

A

The cell continues to grow and make proteins for the new cell that will be formed after cytokinesis. The mitochondria and chloroplast will be duplicated in this phase.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The chromatin which contains the replicated DNA is in a loosely coiled form. Since it is loose the DNA can be replicated in preparation for cell division.

A

Read

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

Explain why the skin cells of an Adult must divide.

A

Because they get worn down and get used a lot.

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

List he three stages of the cell cycle?

A

Interphase, mitosis, cytokinesis.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What events take place during interphase?

A

It’s the longest stage. The cells contents are separated but the cell continues to produce proteins.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Why is DNA replication so important.

A

Because without it new cells cannot be created and without new cells your body cannot survive.

19
Q

What does DNA look like at the end of interphase?

A

Chromatin

20
Q

How does a cell prepare for cell division?

A

Proteins are made for the replica cell and the DNA, organelles are duplicated.

21
Q

What happens during Mitosis?

A

The contents of the cells nucleus divides. It is broken down into 5 stages.

22
Q

What are the five stages?

A

Early prophase.

23
Q

What happens in early prophase?

A

Chromosomes coil up. The nuclear membrane will start to break down and the nucleolus will disappear. Spindle fibres stretchy across the cell from the 2 centrioles that are at opposite ends of the cell.

24
Q

What is a centrioles?

A

A organelle that organizes the spindle fibres during mitosis.

25
Q

What are spindle fibres?

A

Tiny tube like structures made of proteins.

26
Q

Explain late prophase

A

Spindle fibres complete and chromosomes attach to them at there centromeres. And the nuclear membrane disappears.

27
Q

What happens during metaphase?

A

The tugging action of the spindle fibres pulls the x-shapes chromosomes into a single line across the middle of the cell.

28
Q

Anaphase?

A

The spindle fibres begin to contract and shorten. The action causes the centimetres to pull apart and the nucleus expands. Then the chromosomes are pulled apart and split in two. They will then be considered their own chromosome

29
Q

Telephase?

A

A complete set of 46 chromosomes are complete and split. The spindle fibres begin to disappear. A membrane forms around each set of chromosomes. A nucleolus appears in each nucleus. Now three is two nuclei in a cell and they are ready to divide.

30
Q

What is cytokinesis?

A

The separation of the two nuclei (daughter cells) which are exactly identical.

31
Q

Why wouldn’t a cell divide?

A

Because it didn’t have enough nutrients.
The DNA has not been replicated.
DNA is damaged.

32
Q

What are checking proteins?

A

Monitor the cells activities and send the info to the nucleus.

33
Q

How does cancer occur?

A

If a check point protein is mutated the cell cycle will be out of control.

34
Q

Define cancer?

A

It is the name given to a disease that the cell uncontrollably divide.

35
Q

What is a tumour made up of?

A

The cells that have been uncontrollably dividing.

36
Q

How are cancer cells specialized?

A

They are not, so they do not function as part of your body.

37
Q

What feeds the tumour?

A

Nutrients produced by the body.

38
Q

How are scientist erases chin cancer?

A

Through gene nutation.

39
Q

What are the haste of mitosis in order?

A

Early prophase, late prophase, metaphase, anaphase, telophase

40
Q

What does the nucleus look like during prophase?

A

It does not have a membrane. It is filled with centromeres, chromosomes, spindle fibres.

41
Q

What do the chooses look like during praise.

A

They are coiled up into X shapes

42
Q

What is the importance of checkpoints in the cell cycle?

A

To make sure the the cycle doesn’t go out of hand and send the messages to the nucleus.

43
Q

What happens is the checkpoint proteins are mutated?

A

The cell cycle will uncontrollably divide and may cause cancer.

44
Q

Why must the nuclear membrane break down.

A

So the nucleus can stretch into 2 nuclei.

Science 9 (11 decks)

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