Cell Reproduction Quiz Flashcards Preview

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Flashcards in Cell Reproduction Quiz Deck (35):
0

How long do cells live for?

Until they die or split

1

How often do cells divide?

Varies with each organism

2

What are some cells that rarely divide?

Muscles, liver, nerves, brain cells

3

What is it called when cells divide too much?

Cancer.

4

Why does unicellular life divide?

Asexual reproduction

5

What makes big cells inefficient?

Too much volume too little surface area

6

How is cell efficiency determined?

By its surface area to volume ratio

7

Why does multicellular life divide?

To grow and heal

8

What part of a cell actually divides during mitosis?

DNA actually divides

9

What is another name for mitosis

Mitotic phase

10

What happens to a cell during prophase?

The DNA condenses, organizes and the chromosomes structure appears

11

Why do chromosomes become visible during prophase?

Because DNA condenses

12

What is the cell cycle?

An ordered series of events in the life of a eukaryotic cell

13

Interphase?

The stage during which cell carries out its metabolic processes and performs it's functions

14

What is the order of the phases

Prophase
Metaphase
Anaphase
Telophase

15

During G1 what is the cell doing?

Cell grows

16

What is being duplicated during S phase?

The genetic material (DNA & chromosomes)

17

What happens on the g2 phase?

The cell prepares for division by making copies of its organelles such as mitochondria and chloroplasts

18

What happens during the mitotic phase

Chromosomes divide

19

What happens during cytokinesis

Cytoplasm divides

20

Examples of when something is in G1 but eventually stop growing

Nerve & heart cells

21

What must DNA be passed to?

Daughter cells

22

When is DNA copied

S phase

23

When do chromosomes form?

During g2 because nda spools around histones (exceptionally emall proteins)

24

Describe how chromosomes form

1. Chromosomes duplicate
2. Creates sister chromatids
3. Identical chromosomes separate and ate distributed to two daughter cells

25

What happens in prophase?

Chromosomes finish forming sister chromatids. Spindle fibers form

26

What are spindle fibers?

Made of microtubules

27

What do spindle fibers do?

Stretch from pole to pole & eventually connect the centromere of the chromosome

28

What 2 cell parts break down during prophase?

Nuclear envelope and nucleolus

29

Where are microtubules arranged in a ring formed?

Animal cells

30

What is the function of microtubules

Helps form cytoskeleton & spindle fibers

31

What happens during g2

Asters form and centrioles replicate

32

Asters

Short microtubules in patter around the centriole
Acts as a substitute cytoskeleton only in animal cells

33

What happens in metaphase

Spindle fibers move chromosomes to the equator

34

Anaphase is what stage

3rd stage (away, apart)