photosynthesis

Question 1

equation for photosynthesis

Answer 1

carbon dioxde+water–(sunlight)–> glucose+oxygen

Question 2

where does photosynthesis take place in the cell?

Answer 2

chloroplasts

Question 3

what does chloroplasts do?

Answer 3

absorb sunlight and uses its energy to convert co2 and water into glucose.

Question 4

where does photosynthesis take place in the plant?

Answer 4

the leaf

Question 5

what does the limiting factor depend on?

Answer 5

the conditions

Question 6

what three factors limit the rate of photosynthesis?

Answer 6

light intensity, co2 and temperature

Question 7

at night what would be the limiting factor?

Answer 7

light

Question 8

what plant is good to measure the amount of oxygen produced?

Answer 8

canadian pondweed

Question 9

how would you measure the amount of oxygen produced

Answer 9

count the bubbles given off or collect the ocygen in a gas syringe

Question 10

how does light slow down the rate?

Answer 10

if there isnt enoughof it

Question 11

what happens when the light level is increased?

Answer 11

the rate increases up to a certain point then temp of co2 will be the limiting factor.

Question 12

how can you change the light intensity in a lab?

Answer 12

move the lamp closer/further away from your lamp

Question 13

how can you measure light intensity?

Answer 13

light meter

Question 14

how do you control the amount of co2?

Answer 14

dissolve different amounts of sodium hydrogencarboate in the water which gives off co2

Question 15

if the plan gets too hot what happens

Answer 15

the enzymes needed for photosynthesis denature

Question 16

what temp does enzymes denature?

Answer 16

45 degrees

Question 17

how can you control the temp of a flask

Answer 17

put it in a water bath

Question 18

how to make all the experiments fair?

Answer 18

• use a bench lamp(careful not to block light with anything)
• keep flask in water bath to help keep temp constant
• use large flask and do experiment quickly so it doesnt use up too much of the co2

Question 19

how does greenhouses make sure the temp doesn’t become limiting?

Answer 19

they help to trap the suns heat. A farmer may also use a heater in winter, in summer he may use shades and ventilation

Question 20

how do they have light in greenhouses?

Answer 20

artificial light

Question 21

how do they increase the co2?

Answer 21

paraffin heater to heat the greenhouse-as it burns it makes co2

Question 22

what does keeping them in a greenhouse help with?

Answer 22

-keeping free from pests and diseases

Question 23

how do plants use glucose(5)

Answer 23

• respiration:releases energy which enables them to convert the rest of the glucose into other useful substances
• making cell walls:glucose is converted into cellulose
• making proteins:glucose is combined with nitrate ions to make amino acids which are made into proteins
• stored in seeds: glucose is turned into lipids for storing in seeds.
• stored as starch: glucose is turned into starch and stored in roots,stems and leaves. Starch is insoluble so its better for storing than glucose