Cells Revision

Question 1

Nucleus

Answer 1

contains genetic material that controls the activities of the cell.

Question 2

Cytoplasm

Answer 2

gel-like substance where most of the ghemical reactions happen.It contains enzymes that control these chemical reactions.

Question 3

Cell membrane

Answer 3

holds the cell together and controls what goes in and out.

Question 4

Mitochondria

Answer 4

These are where most of the reactions for aerobic respiration take place. Respiration transfers energy that the cell needs to work.

Question 5

Ribosomes

Answer 5

these are where proteins are made in the cell.

Question 6

Differentiation

Answer 6

The process by which a cell changes to become specialised for its job.

Question 7

Sperm cells are specialised for…

Answer 7

Reproduction

Question 8

Nerve cells are specialised for…

Answer 8

Rapid signalling

Question 9

Muscle cells are specialised for…

Answer 9

Contraction

Question 10

Root hair cells are specialised for…

Answer 10

Absorbing water and minerals

Question 11

Phloem and xylem cells are specialised for..

Answer 11

transporting substances

Question 12

Rigid cell wall

Answer 12

Made of cellulose. It supports the cell and strengthens it

Question 13

Permanent vacuole

Answer 13

contains cell sap, a weak solution of sugar and salts.

Question 14

Chloroplasts

Answer 14

these are where photosunthesis occurs, which makes food for the plant. They contain a
green substance called chlorophull, which absorbs the light needed for photosynthesis.

Question 15

Cells can either be ……. or …….

Answer 15

Prokaryotic or eukaryotic