Lesson 3 Cell Division

Question 1

What is cell cycle?

Answer 1

a cycle when a cell grows, preps for division and divides into two daughter cells

Question 2

What is interphase?

Answer 2

The first stage , during which a cell grows and makes a copy of its DNA

Question 2

What is replication?

Answer 2

a cell makes a copy of the DNA in its nucleus before cell division

Question 3

What is a chromosome?

Answer 3

Threadlike structure within a cell’s nucleus that contains DNA

Question 4

What is mitosis?

Answer 4

The second stage of cell cycle during which the cell’s nucleus divides into two new nuclei and one set of DNA is distributed into each daughter cell

Question 5

What is cytokinesis?

Answer 5

The final stage of the cell cycle, cell’s cytoplasm divides distributing the organelles into each of the two new daughter cell’s

Question 6

What does cell division allow?

Answer 6

Growth, reproduction, and repair

Question 7

What are the ways organisms can reproduce (a,b,c)?

Answer 7

a. Just thru cell division
b. when cell division leads to new cell structures
c. When two specialized cells combine, making a new cell

Question 8

What happens during growth in interphase?

Answer 8

Cell grows to its full size, producing all organelles in the process

Question 9

What happens inside the nucleus during interphase?

Answer 9

DNA & proteins form chromosomes

Question 10

What happens at the end of replication?

Answer 10

the cell will contain two identical sets of chromosomes

Question 11

What is the first stage of cell division?

Answer 11

interphase

Question 12

At the end of interphase the cell is ready to…

Answer 12

divide

Question 13

what is the second stage of cell division?

Answer 13

mitosis

Question 14

What happens during mitosis?

Answer 14

The cell’s nucleus divides and one set of DNA is given to each forming daughter cell

Question 15

What are the four phases of mitosis in order?

Answer 15

PMAT

Question 16

What happens during prophase?

Answer 16

nucleus dissolves, chromosomes condense, centrioles move to opposite sides of the cells

Question 17

What happens during metaphase?

Answer 17

spindle fibers attach to the centromere of the duplicated chromosome and nucleus disappears

Question 18

What happens during anaphase?

Answer 18

Spindle fibers split the duplicated chromosomes to two chromatids each cell membrane stretches (peanut stage)

Question 19

What is a chromatid?

Answer 19

The threadlike structure attached to the centromere. Two per chromosome

Question 20

What happens during telophase?

Answer 20

Nuclear membrane envelope redevelops

Question 21

What is a centromere?

Answer 21

It holds all the chromatids together

Question 22

What is a duplicated chromosome?

Answer 22

Four chromatids with a centromere

Question 23

What is the final stage of cell division?

Answer 23

Cytokinesis

Question 24

cytokinesis starts at the same time as…

Answer 24

telophase

Question 25

What happens at the end of cytokinesis?

Answer 25

The start of a new cycle

Question 26

What happens in cytokinesis in animal cells?

Answer 26

cytoplasm splits into two cells and each daughter cell gets half of parents organelles

Question 27

What happens in cytokinesis in plant cells?

Answer 27

A cell plate forms across the middle of a plant cell, cell plate starts to form new cell membranes between the two daughter cells