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Biology > b4 > Flashcards

b4 Flashcards

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1
Q

what do plants use for there source of energy

A

plants use light

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2
Q

what is the reaction plants use to trap light energy is called

A

photosynthesis

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3
Q

is Photosynthesis an endothermic and exderthermic reaction

A

endothermic reaction because it takes in energy

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4
Q

where does Photosynthesis take place in a plant

A

the leaves

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5
Q

what do the leaves of the plant contains

A

a green substance chlorophyll chlorophyll can absorb light energy

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6
Q

what’s the word equation for Photosynthesis

A

carbon dioxide + water with little light (chlorophyll) glucose + oxygen

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7
Q

what happens if we only keep increasing the light intensity in Photosynthesis

A

the rate of Photosynthesis will no longer increase due to the light intensity bing the limiting factor

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8
Q

what can effect the rate of Photosynthesis

A

the amount of chlorophyll in the leaf

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9
Q

name off the Photosynthesis limiting factor

A

Light intensity, carbon dioxide concentration and temperature

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10
Q

what happens if we keep on increase the temp

A

the enzyme will denature and the rate of Photosynthesis will fall

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11
Q

what is use for the glucose

A

to release energy in respiration

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12
Q

were does respiration take place

A

in the mitochondria

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13
Q

glucose produced by Photosynthesis is to produce

A

the insoluble storage molecule starch

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14
Q

when can the starch be converted

A

it can be converted back to glucose at night by the plant when it is needed

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15
Q

what is cellulose

A

is in the plant wall which gives it strength

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16
Q

does glucose prudence amino acids

A

yes

17
Q

to make amino acid from glucose what do the plant need to do

A

absorb nitrate ions from the soil

18
Q

why is a LED light used in the Photosynthesis practical

A

because it dissent use that much heat to much heat will change the temp of the experiment

19
Q

if we use a normal light what do we have to do in the Photosynthesis practicle

A

we have to put a beaker of water in form of the light it aborbs the heat of the lamp

20
Q

Photosynthesis practical

A

we place a led light source at the end of the ruler at 0 cm and the boiling tube at 10cm we fill it up with sodium hydrogen carbonate solution which release carbon dioxide with needed for Photosynthesis then we place a bit of pondweed in the boiling tube with a cut end on it then we now leave it for 5 mins we should see bubble of mass being produced fro the end of pondweed the glass is oxygen with is produced by Photosynthesis the we get a stop watch and count the amount of bubble produced in one minute we repeat it 2 time at calculate the whole mean from it then reap the whole thing again at 20cm 30cm and 40cm

21
Q

what are the problems pf the Photosynthesis practical

A

the bubble might be tp fast to count accurately the bubble are not the same size

22
Q

what do we use if we want to find the right amount of bible produced in the Photosynthesis practical

A

we use a measuring cylinder and a funnel and we acth the bubble in the measuring cylinder filled with water the use the measuring cylinder to calculate the value of it produced

23
Q

is respiration and endothermic or a exothermic reaction

A

its a exothermic because it relates energy

24
Q

is aerobic respiration using oxygen or without oxygen

A

oxygen

25
Q

aerobic respiration reales a

A

grat deal of energy because the glucose molecule has been fully oxidised

26
Q

when there’s a shortage of oxygen muscle cells repair

A

anaerobically

27
Q

does anaerobic respiration release oxygen

A

no it docent

28
Q

does anaerobic respiration release more or less energy

A

less energy

29
Q

why in anaerobic respiration releases less energy then aerobic respiration

A

its because in anaerobic respiration the oxidation if glucose if incomplete

30
Q

where can anaerobic respiration also take place in

A

in plants and yeast

31
Q

the word equation for aerobic respiration

A

glucose +oxygen gives out carbon dioxide = water

32
Q

the word equation for anaerobic respiration

A

glucose gives out lactic acids

33
Q

when the body needs more energy which type of respirations increases

A

aerobic respiration

34
Q

what happens if we are excising to hard

A

not enough oxygen can be supplied to the muscles and anaerobic respiration takes place

35
Q

what does the lactic acid make the muscles do

A

to become more fatigued courses the muscles not storm contrasting efficiently

36
Q

what does it create when the body has to remove the lactic acid from the muscles

A

oxygen debt

37
Q

what is metabolism

A

its the sum of all chemic reactions in a cell and the body

38
Q

is respiration a chemical reaction

A

yes

Biology (10 decks)

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