plant and animal cell

Question 1

function of cell membrane

Answer 1

partially permeable

allows only small substance to pass through and not bigger ones

Question 2

function of cytoplasm

Answer 2

where all cell activities take place

Question 3

function of vacuole

Answer 3

many small vacuoles

stores food and water (water is called cell sap)

Question 4

function of mitochondria

Answer 4

breaks down glucose to release energy for cell activities

produce carbon dioxide

Question 5

function of nucleus

Answer 5

contain chromosomes (DNA)
control all activities in cells (eg cell growth, repair wornout parts)

Question 6

function of cell wall

Answer 6

fully permeable
protect plant cells from injury
give plant a fixed regular shape

Question 7

function of chloroplast

Answer 7

contains chlorophyll
traps light energy to make food during photosynthesis
food stores chemical energy

Question 8

3 difference between animal and plant cells

Answer 8

1) P has cell wall, A does not
2) P has one large vacuole, A has many small vacuoles
3) P has chloroplast, A does not

Question 9

difference between mitochondrion and mitochondria

Answer 9

mitochondrion - singular

mitochondria - plural

Question 10

function of red blood cell

Answer 10

to transport oxyen from lungs to other parts of the body

Question 11

function of xylem vessel

Answer 11

transport water and mineral salts from the roots to the leaves

Question 12

function of root hair cell

Answer 12

absorbs water and mineral salt

Question 13

RBC contain a red pigment called haemoglobin

Answer 13

haemoglobin binds to oxygen

allow RBC to carry oxygen around the body

Question 14

RBC no nucleus

Answer 14

able to carry more haemoglobin = carry more oxygen

Question 15

RBC has biconcave shape

Answer 15

increase surface area to volume ratio, thus

increase rate of diffusion

Question 16

XV has no protoplasm and no cross walls

Answer 16

allow H2O and mineral salt to move up easily without resistance

Question 17

XV has lignin

Answer 17

provide chemical support

prevent from collapsing

Question 18

RHC has long and narrow root hair

Answer 18

increase surface area to volume ratio, thus

increase the rate of absorption of H2O and mineral salt

Question 19

RHC have large number of mitochondria

Answer 19

release energy to help absorb mineral salt by active transport

Question 20

define tissues

Answer 20

a group of different cells working together

e.g. muscles

Question 21

define organs

Answer 21

different tissues working together

e.g. heart

Question 22

define organ system

Answer 22

a group of different organs working together

e.g. blood vessels

Question 23

define organism

Answer 23

a different multicellular organism is made up of different organ systems working together