unit 1

Question 1

function of a ribosome

Answer 1

site of protein synthesis and is in both plant and animal cells

Question 2

function of the nuculas

Answer 2

controls cell activity and is in both plant and animal cells

Question 3

function of the cell membrane

Answer 3

controls movement of material in and out of a cell and in both plant and animal cells

Question 4

function of chloroplast

Answer 4

site of photosynthesis and only in plant cells

Question 5

function of mitochondria

Answer 5

site of the aerobic stages in respiration and in both plant and animal cells

Question 6

function of cell wall

Answer 6

supports the cell and only in plant cells

Question 7

function of cytoplasm

Answer 7

site of chemical reactions and in both plant and animal cells

Question 8

function of vacuole

Answer 8

stores cell sap and is only in plant cells

Question 9

what do bacterial cells not contain

Answer 9

they do not contain a nuculas or a mitochondria

Question 10

what do bacterial cells contain

Answer 10

they do contain plasmid, ribosomes and a circular chromosome

Question 11

what dose pure water do to a animal cell

Answer 11

makes it burst

Question 12

what dose a strong sugar/salt solution do to a animal cell

Answer 12

makes it shrink

Question 13

what dose pure water do to a plant cell

Answer 13

make it become turgid

Question 14

what dose a strong salt solution do to a plant cell

Answer 14

makes it become plasmolysed

Question 15

what is stage one of mitoses

Answer 15

chromosomes become visible

Question 16

what is stage two of mitoses

Answer 16

chromatid pairs line up at the equator

Question 17

what is stage three of mitoses

Answer 17

spindle fibbers attach to the chromosomes

Question 18

what is stage four of mitoses

Answer 18

spindle fibres contract and chromatids are pulled apart

Question 19

what is stage five of mitoses

Answer 19

chromosomes move to poles of cell. nuculas membrane is formed

Question 20

what is stage six of mitoses

Answer 20

cytoplasm divides

Question 21

what can stem cells be used for

Answer 21

skin graphs and corneal repairs

Question 22

what are the complementary base pairs

Answer 22

adenine and thymine
cytosine and guanine

Question 23

what are proteins made of

Answer 23

amino acids

Question 24

protein synthesis step one

Answer 24

DNA uncoils and the two strands separate

Question 25

protein synthesis step two

Answer 25

a complementary strand of mRNA is made against the gene

Question 26

protein synthesis step three

Answer 26

mRNA leave the nuculas through a pore

Question 27

protein synthesis step four

Answer 27

mRNA travels to a ribosome in the cytoplasm

Question 28

protein synthesis step five

Answer 28

the ribosomes read the three bases which code for an amino acid

Question 29

protein synthesis step six

Answer 29

the ribosome continues to read the mRNA and a chain of amino acids are assembled

Question 30

what are the functions of proteins

Answer 30

structural, hormones, antibodies, receptors and enzymes

Question 31

what are the two types of reactions

Answer 31

synthesis and degradation

Question 32

what are two factors which can effect enzyme activity

Answer 32

ph and temperature

Question 33

what is the word equation for photosynthesis

Answer 33

(look in jotter for answer)

Question 34

what are the limiting factors of photosynthesis

Answer 34

light intensity, temperature and PH