Cell Division

Question 1

Why do cells divide? 3 Reasons

Answer 1

Reproduction
Growth
Repair

Question 2

Basis of cell theory?

Answer 2

All cells come from preexisting cells

Question 3

When genetic material packed dense they are _______ when loose they are ______.

Answer 3

Chromosomes

Chromatin

Question 4

In speaking of the ‘function’ of genes, we’re speaking of:

Answer 4

Chromatin

Question 5

If a cell isn’t dividing we say it’s in:

Answer 5

Interphase

Question 6

In interphase DNA exist as..

Answer 6

Chromatin

Question 7

In human cells there are __ chromosomes.

Answer 7

46

Question 8

T/F # of chromosomes is an indicator of complexity of the organism.

Answer 8

FALSE - Depends on what genes are on chromosomes

Question 9

Double helices wrap around proteins called..

Answer 9

Histones

Question 10

When coiled they form a supercoil made up of..

Answer 10

Chromatin Fiber

Question 11

DNA as chromosomes are usable. T/F?

Answer 11

FALSE - Unusable until they’re chromatin

Question 12

One linear piece of physically attached DNA

Answer 12

Chromosome

Question 13

Once a chromosome is copied each copy is called a…

Answer 13

Sister Chromatid

Question 14

Before replication DNA is in this state.

Answer 14

Double strand, but one copy. One double helix.

Question 15

After replication?

Answer 15

Double strand, 2 copies! 2 Single Stranded chromosomes.

Question 16

A cell that divides must _______ then _______.

Answer 16

Duplicate

Seperate

Question 17

The main difference between mitosis and binary fission?

Answer 17

Binary fission is Non-Stop!! Repeated divisions and identical cells

Question 18

Mitosis =

Answer 18

1 Replication, 1 Division, 2 Identical daughters

Question 19

Meiosis =

Answer 19

1 Replication, 2 Divisions, 4 Unique daughters

Question 20

During which phase of Mitosis do chromosomes become visible?

Answer 20

Prophase!

Question 21

In the cell cycle, in what phase do Mitosis & Cytokinesis occur?

Answer 21

M Phase

Question 22

This phase accounts for 90% of the cell cycle.

Answer 22

Interphase

Question 23

During interphase the cell is…

Answer 23

Doing it’s job. Cellular respiration, working, moving, preparing for division (If it’s going to) cell growth & organelle expansion.

Question 24

In the G1 Phase, the cells are..

Answer 24

Working, growing, ignoring DNA

Question 25

From G1 they move to –>

Answer 25

S Phase (Synthesis)

Question 26

During the S phase?

Answer 26

Starts to copy DNA 8 to 88

Question 27

Once synthisized, the cells move into ___ to get ready for division.

Answer 27

G2

Question 28

Once ready in the G2 phase the cell will move into the..

Answer 28

M Phase