Question 1

what is respiration?

Accepted Answer

a process by which ALL living organisms release energy using glucose

Answer

a process by which ALL living organisms release energy using carbon dioxide

Question 2

Plants do not eat. How do they get glucose?

Accepted Answer

They make their own glucose using photosynthesis.

Answer

They make their own glucose using respiration.

Question 3

what is glucose?

Accepted Answer

a sugar with the formula C₆H₁₂O₆

Answer

a sugar with the formula C₆H₁₂O₇

Question 4

what is the word equation for photosynthesis?

Accepted Answer

carbon dioxide + water (+sunlight) --> glucose + oxygen

Answer

oxygen + water (+sunlight) --> glucose + carbon dioxide

Question 5

what is the symbol equation for photosynthesis?

Accepted Answer

CO₂ + H₂O --> C₆H₁₂O₆ + O₂

Answer

C₆H₁₂O₆ + O₂--> CO₂ + H₂O

Question 6

which substance absorbs sunlight?

Accepted Answer

chlorophyll in chloroplasts

Answer

chlorophyll in root hair cells

Question 7

what is photosnyhthesis an example of?

Accepted Answer

endothermic reaction - it takes energy IN

Answer

exothermic reaction - it releases energy OUT

Question 8

what happens to the oxygen produced in photosynthesis?

Accepted Answer

it passes out of the leaf

Answer

it stays stuck in the leaf

Question 9

what happens to the glucose produced from photosynthesis?

Accepted Answer

some used up immediately in respiration, some converted into starch for storage and used to make other molecules such as amino acids.

Answer

all of it is used in respiration

Question 10

which of these is not a leaf adaptation?

Accepted Answer

they have alveoli to allow gas exchange

Answer

they have air spaces that allow carbon dioxide to get to the cells and oxygen to leave by diffusion

Answer

guard cells which open and close stomata to regulate gas exchange

Answer

broad so that it has a large surface area

Question 11

which of these is not a leaf adaptation?

Accepted Answer

they have alveoli to allow gas exchange

Answer

they have air spaces that allow carbon dioxide to get to the cells and oxygen to leave by diffusion

Answer

broad so that it has a large surface area

Answer

thin so that diffusion distances for the gases are short

Question 12

how are aquatic plants such as algae adapted to do photosynthesis?

Accepted Answer

they have a large surface area and can absorb carbon dioxide dissolved in the water around them

Answer

they have a small surface area and can absorb carbon dioxide dissolved in the water around them

Question 13

what do plants need to do photosynthesis?

Accepted Answer

light, warmth and carbon dioxide

Answer

light, water and carbon dioxide

Question 14

when one of light/warmth/carbon dioxide is in short supply and limits the amount of photosynthesis what is it called?

Accepted Answer

limiting factor

Answer

repeating factor

Question 15

what could limiting factors for photosynthesis be?

Accepted Answer

light, temperature and carbon dioxide concentration

Answer

light, water and carbon dioxide concentration

Question 16

the brighter the light

Accepted Answer

the faster the rate of photosynthesis

Answer

the slower the rate of photosynthesis

Question 17

if the temperature is too high

Accepted Answer

the enzymes denature and photosynthesis stops

Answer

the enzymes work harder and photosynthesis increases

Question 18

if a plant does not have enough magnesium

Accepted Answer

it cannot make enough chlorophyll

Answer

it makes lots of chlorophyll

Question 19

light intensity =

Accepted Answer

1/ distance squared (light intensity decreases ALOT)

Answer

distance squared (light intensity increases ALOT)

Question 20

what can glucose be used for?

Accepted Answer

it is used to make cellulose for cell walls

Answer

it is used to make galactose for cell walls

Question 21

why is glucose stored as starch?

Accepted Answer

it is large, compact and insoluble so it won't affect osmosis

Answer

it is small, compact and insoluble so it affects osmosis

Question 22

test for starch?

Accepted Answer

yellow iodine solution turns blue black

Answer

yellow iodine solution stays yellow

Question 23

plants can make amino acids by

Accepted Answer

combing sugars and nitrate ions from the soil into amino acids which attach together to form proteins

Answer

combing water and nitrate ions from the soil into amino acids which attach together to form proteins

Question 24

why do carnivorous plants exist?

Accepted Answer

these plants live in nitrate-poor soils and cannot make amino acids using the mineral ions so rely on digesting insects to absorb minerals from their bodies and make their own amino acids

Answer

these plants live in nitrate-rich soils and cannot make amino acids using the mineral ions so rely on digesting insects to absorb minerals from their bodies and make their own amino acids

Question 25

some glucose is used to make fats and oils (lipids)

Accepted Answer

are an energy source, make cell walls stronger and are a storage of energy in seeds

Answer

are an energy source, make cell walls weaker and are a storage of energy in seeds

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