Cell Biology

Question 1

What is mitosis?

Answer 1

A type of cell division which produces daughter cells identical to the parent.

Question 2

Cells divide when…

Answer 2

• an organism grows

- an organism becomes damaged and needs repaired.

Question 3

Mitosis:
Step 1. Cell begins to divide.
Step 2 ????

Answer 3

Dna replicates to form 2 copies of each chromosome.

Question 4

Mitosis:
Step 2. Dna replicates to form 2 copies of chromosomes.
Step 3 ?????

Answer 4

Nuclear membrane breaks down. Chromosomes line up across centre of cell.

Question 5

Mitosis:
Step 3. Nuclear membrane breaks down. Chromosomes line up across centre of cell.
Step 4 ?????

Answer 5

One set if chromosomes is pulled to each end of cell and nucleas divides.

Question 6

Mitosis:
Step 4. One set of chromosomes is pulled to each end of cell and nucleus divides.
Step 5 ?????

Answer 6

Cytoplasm and cell membranes divide to form 2 identical cells.

Question 7

Name 2 clinical issues of therapeutic cloning.

Answer 7

1. Difficulty in finding suitable donors.

2. Possible transfer of viruses.

Question 8

Name 2 ethical issues with therapeutic cloning.

Answer 8

1. You create embryos and destroy them in the process.

2. Some embryos are unused from ivf.

Question 9

Name 2 social issues with therapeutic cloning.

Answer 9

1. Educating thr public on what stem cells can or can’t do.

2. Whether the benefits outweigh the objections.

Question 10

How is the inital cell made for therapeutic cloning?

Answer 10

Using the nucleus from the patients cell and the egg cell from donor without the nucleus.

Question 11

What is this egg then used for?

Answer 11

Simulated to divide.

Question 12

What happens after stem cell is simulated to divide in therapeutic cloning?

Answer 12

Cells develop into embryo.

Question 13

Therapeutic cloning.
Cells develop into an embryo.
Next step…

Answer 13

Wait 4-5 days before removing the stem cells.

Question 14

Therapeutic cloning.
Wait 4-5 days, then remove the stem cells.
Next step….

Answer 14

Stem cells from embryo are cultured for therapeutic reasons.

Question 15

What change are we meant to see during the potato osmosis rp?

Answer 15

Change in length and mass.

Question 16

Name 3 uses of human stem cells.

Answer 16

1. Replace faulty blood cells.
2. Making insulin producing cells.
3. Making nerve cells.

Question 17

Name 2 cons of using stem cell treatment.

Answer 17

1. Embryos are human life.

2. Scientists need to find other sources of stem cells.

Question 18

What type of stem cells are undifferentiated and what does that mean?

Answer 18

Embryonic stem cell.

They have the potential to turn into any kind of cell.

Question 19

Name 2 pros of stem cell treatment.

Answer 19

1. Curing patients is more improtant than embryo rights.

2. They are only using embryos that would be wasted anyway.

Question 20

Where are stem cells found in plants?

Answer 20

The meristem.

Question 21

How can plant stem cells be useful? Give one example.

Answer 21

Disease resistant crops.