3.2.2 All Cells Arise from other cells

Question 1

How do cell divide in eukaryotic organims?

Answer 1

Mitosis

Question 2

What are the two parts to the cell cycle in eukaryotic organisms?

Answer 2

1. Interphase
2. Mitosis

Question 3

What occurs during interphase?

Answer 3

1. DNA unravels and is replicated to double its genetic content
2. Its organelles also begin to replicate and ATP levels increase

Question 4

What is mitosis?

Answer 4

Mitosis is the party of the cell cycle where a eukaryotic cell divides to produce two identical daugter cells

Question 5

What are the 5 stages of mitosis?

Answer 5

1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
5. Cytokensis

Question 6

What occurs during Prophase?

Answer 6

1. Chromosomes condense by getting shorter and fatter
2. Centrioles move to the poles of the cells
3. The nuclear envelope begins to break down

Question 7

What occurs during Metaphase?

Answer 7

1. The chromosomes line up at the equator
2. The centriole spindle fibres attach to the centromere

Question 8

What occurs during Anaphase?

Answer 8

1. The centromeres divide seperating each pair of sister chromatids
2. The spindles contract pulling chromatids to oppoiste poles
3. This makes the centromere look v-shaped

Question 9

What occurs during Telophase?

Answer 9

1. The chromatids reach the poles and begin to unfold and are now called chromosomes again
2. A nuclear envelope forms around each group of chromosomes

Question 10

What occurs during Cytokensis?

Answer 10

Divison of the cytoplasm and form the two identical daughter cells

Question 11

What is cancer?

Answer 11

Cancer is the formation of a tumor that invades the surrounding tissue. Tumors form through the uncontrolled division of cells

Question 12

What are the two types of cancer?

Answer 12

Maliganant
Benign

Question 13

What are maliganat tumors?

Answer 13

Faster growing
Tumor metastisises

Question 14

What are benign tumors?

Answer 14

Slower growing
Stays in one place