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Flashcards in Cell Division Quiz Deck (35)
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0

Why cell division?

To support bodily function
To heal
To reproduce
To replenish dead cells

1

What are the three positives of asexual reproduction

Very fast
Energy sufficient
Makes a lot of offspring

2

What is the negative of asexual reproduction Ct

If it dies all are likely to die too: no variation

3

What are the three negatives of sexual reproduction

Slow
Not energy sufficient
Fewer offspring

4

What is the positives of sexual reproduction

Unique: genetic variation

5

Cell division happens in (what kind of cells)?

Somatic (body) cells and not germ (sex) cells

6

In eukaryotic cells what are the two main stages of cell division

Mitosis and cytokinesis

7

Reproduction by mitosis is classified as

Asexual since the cells produced by mitosis are genetically identical to the parent cell

8

What are chromosomee

In eukaryotic cells the genetic information that is passed on from one generation of cells to the next is carried by chromosomes

9

What are chromosomes made up of

DNA and proteins

10

When are chromosomes visible in most cells

During cell division

11

What are chromatids

Well before cell division, each chromosome is replicated, or copied. Because of this, each chromosome consists of two identical sister chromatids

12

Each chromatid is attached to an area called the

Centromere

13

Define centromere

Centromere's are usually located near the middle of the chromatids, although some line near the ends

14

Period of growth in between cell divisions is called

Interphase

15

What occurs during the cell cycle

During the cell cycle the cell grows, prepares for division, and divides to form two daughter cells, each of which then begins the cycle again.

16

Which phase occurs in the M phase?

Mitosis and cytokinesis

17

Which phases occur during the S-phase

Chromosome replication or synthesis. When the cell copies of chromosomes it makes a duplicate set of DNA

18

Which phases are between the M and S phases?

G1 and G2

19

What are the g1 and g2 phases?

They are actually periods of intense growth and activity

20

Interphase is divided into three phases:

G1 S and G2

21

What occurs in the G1 phase

Growth: cells increase in size and synthesize new proteins and organelles

22

What occurs during the S phase?

Chromosomes are replicated and the synthesis of DNA molecules take place. Key proteins associated with the chromosomes are also synthesize

23

What happens during the G2 phase

Many organelles and molecules required for Cell division are produced. When it's completed the cell is ready to enter the M phase and begin the process of cell division

24

What are the four phases of mitosis

Prophase
Metaphase
Anaphase
Telophase

25

What are centrioles

Two tiny structures located in the cytoplasm near the nuclear envelope at the beginning of prophase

26

What is the spindle

A fanlike microtubule that helps separate the chromosomes

27

Define prophase

The chromatin condenses into chromosomes. The centrioles separate, and a spindle begins to form. The nuclear envelope breaks down

28

Define metaphase

The chromosomes line up across the center of the cell. Each chromosome is connected to a spindle fiber at its centromere

29

Define anaphase

The sister chromatids separate into individual chromosomes and are moved apart