Keywords

Question 1

Magnification equation

Answer 1

Magnification = image size / size of real object

Question 2

Nucleus

Answer 2

Controls the activities of the cell (contains genetic information)

Question 3

Mitochondria

Answer 3

Releases energy from glucose in aerobic respiration

Question 4

Cell membrane

Answer 4

Controls what comes in and out of the cell

Question 5

Ribersome

Answer 5

Makes proteins (protein synthesis)

Question 6

Cytoplasm

Answer 6

Jelly like substance where chemical reactions takes place

Question 7

Vacuole

Answer 7

Filled with sap, keeps the cell rigid

Question 8

Chloroplast

Answer 8

Contains green chlorophyll which absorbs sunlight for photosynthesis

Question 9

Cell wall

Answer 9

Made of cellulose, strengthens the cell and gives support

Question 10

Eukaryotic cells

Answer 10

Have a nucleus, cell membrane, cytoplasm e.g. animal and plant cell

Question 11

Prokaryotic cells

Answer 11

No nucleus (circular DNA) e.g. bacterial cells

Question 12

Xylem

Answer 12

Transports water and mineral ions from the root to the leaves & shoots

Question 13

Phloem

Answer 13

Transports glucose produced in photosynthesis in all directions

Question 14

Diffusion

Answer 14

Net movement of particles from a high concentration to a low concentration

Question 15

Increase rate of diffusion

Answer 15

Increase surface area, increase concentration gradient, reduce diffusion distance

Question 16

Osmosis

Answer 16

Net movement of water from a dilute to a more concentrated solution across a semi permeable membrane

Question 17

Isotonic

Answer 17

The concentration outside the cell is the same as inside the cell

Question 18

Hypertonic

Answer 18

The concentration outside the cell is higher than inside the cell

Question 19

Hypotonic

Answer 19

The concentration outside the cell is lower than inside the cell

Question 20

Active transport

Answer 20

Movement of particles from a low concentration to a high concentration across a semi permeable membrane, using energy

Question 21

Stem cell

Answer 21

An unspecialised cell that can become any cell in the body through differentiation

Question 22

Enzyme

Answer 22

Biological catalyst, speeds up chemical reactions without being used up

Question 23

Metabolism

Answer 23

Sum of all the chemical reactions in a cell or the body

Question 24

Denatured

Answer 24

The active site of the enzyme changes shape, will no longer function