cell bio

Question 1

What are the two kinds of cells?

Answer 1

Prokaryotic & eukaryotic cells

Question 2

What does the nucleus contain?

Answer 2

DNA

Question 3

How many pairs of cells are there in a human cell?

Answer 3

23

Question 4

What is the process of division called in prokaryotes called?

Answer 4

Binary Fission

Question 5

How to find the mean division time to find the number of bacteria?

Answer 5

convert the hours into minutes. Divide the total time by the mean division time. This gives you the number of divisions. Multiply 2 by itself for the number of divisions to find the number of cells

Question 6

Where can stem cells be found in plants?

Answer 6

It can be found in the meristem

Question 7

Where can we find an adult stem cell?

Answer 7

In the bone marrow

Question 8

What kind of cell can an embryonic cell be turned into?

Answer 8

Any

Question 9

One ethical issue for using embryonic stem cell

Answer 9

It could be a potential human life

Question 10

What is the result of mitosis?

Answer 10

2 daughter cells

Question 11

Give two uses for stem cells

Answer 11

Can cure many diseases

farmers can grow identical crops that have desired features e.g. disease resistance

Question 12

What are chromosomes?

Answer 12

Coiled up lengths of DNA

Question 13

What are cells?

Answer 13

Building blocks of life

Question 14

What is diffusion?

Answer 14

The gradual movement of particles in an area of higher concentration to lower one.

Question 15

What is osmosis?

Answer 15

The movement of water molecules across a partially permeable membrane from a region of high water concentration to a lower one.

Question 16

Active transportation

Answer 16

Some substances need to be absorbed against a concentration gradient - from a lower to a higher concentration

Question 17

What is differentiation?

Answer 17

A process by which a cell changes to become specialised for its job e.g. red blood cell

Question 18

What is a nerve cell specialised for?

Answer 18

Rapid signalling

Question 19

What is a sperm cell specialised for?

Answer 19

Reproduction

Question 20

What are muscles cells specialised for?

Answer 20

contraction

Question 21

What is a cell cycle?

Answer 21

Growth development and repair of a cell

Question 22

What is needed in order for active transportation to take place?

Answer 22

Energy

Question 23

Where does active transportation take place?

Answer 23

In liquids and gases

e.g. small intestine and root hair cell

Question 24

Where does Osmosis take place?

Answer 24

water

Question 25

Where does diffusion take place?

Answer 25

In liquids and gases