Bioenergetics

Question 1

what is photosynthesis

Answer 1

a process in which plants produce their own food

Question 2

what is the symbol equation for photosynthesis

Answer 2

co2 + H2O —.> c6h12o6 + o2

Question 3

what are the reactants of photosynthesis

Answer 3

carbon dioxide and water

Question 4

what are the products of photosynthesis

Answer 4

oxygen and glucose

Question 5

where in the plant does photosynthesis occur

Answer 5

in chloroplasts in green plants

Question 6

what does chloroplast contain

Answer 6

chlorophyll

Question 7

what is chlorophyll and what does it do

Answer 7

it is a green pigment which absorbs in sunlight

Question 8

what type of reaction is photosynthesis and why

Answer 8

endothermic because it absorbs energy from its surrounding

Question 9

what 5 ways do plants use glucose for

Answer 9

Cellulose
Amino acids
Respiration
Lipids
Starch

Question 10

CARLS - CELLULOSE

Answer 10

glucose is converted into cellulose to produce strong, supportive cell walls enabling them to grow

Question 11

CARLS - AMINO ACIDS

Answer 11

glucose combined with nitrate ions from the soil make proteins

Question 12

why is protein an essential nutrient in plants

Answer 12

it makes vital substances like DNA and enzymes which are essential for growth

Question 13

CARLS- RESPIRATION

Answer 13

used to transfer energy

Question 14

CARLS - LIPIDS

Answer 14

glucose can be broken down into lipids which are then found within seeds

Question 15

CARLS - STARCH

Answer 15

if glucose is not needed it can be converted into starch which is used when there is little sunlight so respiration can still occur

Question 16

where is starch stored in plants

Answer 16

stem, roots, leaves and seeds

Question 17

what are the limiting factors which can affect the rate of photosynthesis

Answer 17

intensity of light
concentration of co2
temperature

Question 18

what happens when these limiting factors are present

Answer 18

it stops photosynthesis from happening faster

Question 19

what is the limiting factor at night time and hwy

Answer 19

light intensity is because there is not enough light

Question 20

what is the limiting factor in winter and why

Answer 20

temperature is because it is cold

Question 21

when can co2 be limiting

Answer 21

when there is bright sunlight
when stomata close
in crowded areas
in controlled environments

Question 22

why is co2 limiting when there is bright sunlight

Answer 22

because plants use more co2 in bright sunlight

Question 23

why is co2 limiting when stomata close

Answer 23

in dry conditions, stomata closes to save up water, this reduces co2 intake

Question 24

why is co2 limiting in crowded areas

Answer 24

when there is a a lot of plants there will be less co2 available for each plant

Question 25

why is co2 limiting in controlled environments

Answer 25

in greenhouses if there is not extra co2, plants will quickly use up what is available

Question 26

why is chlorophyll another limiting factor

Answer 26

if there isn't enough amount of chlorophyll in a plant due to diseases it will affect the rate of photosynthesis

Question 27

what happens if chloroplasts get damaged

Answer 27

it will not make enough chlorophyll

Question 28

if light levels are optimum what will be the limiting factors

Answer 28

temperature or co2

Question 29

if co2 is optimum then what are the limiting factors

Answer 29

temperature or light

Question 30

how do enzymes get damaged

Answer 30

when temperature is above 45 degrees

Question 31

what happens when enzymes are destroyed

Answer 31

rate of photosynthesis will not increase

Question 32

what if enough co2 and light is present

Answer 32

it still wouldn't increase