Photosynthesis and Respiration

Question 1

What is photosynthesis?

Answer 1

Plant uses energy to change carbon dioxide and water into glucose and oxygen

Question 2

Where does photosynthesis take place?

Answer 2

Chloroplasts inside the leaves

Question 3

Word equation for photosynthesis

Answer 3

Carbon dioxide +. water ——-> glucose + oxygen

Question 4

Symbol equation for photosynthesis

Answer 4

6CO2 + 6H20——> C6H1206 + 6O2

Question 5

How do plants use glucose?

Answer 5

for respiration
cellulose
amino acids
stored as starch
stored as lipid

Question 6

Rate limiting factors of photosynthesis?

Answer 6

intensity of light
carbon dioxide concentration
temperature

Question 7

What’s chlorophyll?

Answer 7

green pigment that absorbs sunlight

Question 8

Increased light intensity?

Answer 8

increased rate of photosynthesis up to a point

Question 9

Increased temperature?

Answer 9

increased rate of photosynthesis up to optimum

after optimum enzymes denature and photosynthesis stops

Question 10

Increased carbon dioxide?

Answer 10

increased rate of photosynthesis up to a point

Question 11

how to measure rate of photosynthesis?

Answer 11

How much carbon dioxide is taken in or how much oxygen is given off

Question 12

factors that should be controlled in measuring rate?

Answer 12

light intensity
carbon dioxide concentration
temperature
time

Question 13

What is the inverse square law?

Answer 13

relationship between hight intensity and distance
as distance increases light intensity decreases
light intensity decreases by a bigger proportion
e.g. double the distance = four times less light intensity
1/d2

Question 14

how do farmers create ideal conditions for plant growth?

Answer 14

green house -traps heat
heater- for winter
ventilation- for summer
light- sunlight in day artificial light at night
carbon dioxide- parafin heater produces co2
fertiliser - minerals for growth2

Question 15

what do farmers have to think about when setting up greenhouse?

Answer 15

compromise between cost and harvest

Question 16

What is respiration?

Answer 16

transferring energy from glucose

Question 17

how do organisms use energy from respiration?

Answer 17

build up large molecules from small ones
muscle contraction
maintain body temperature

Question 18

what is metabolism?

Answer 18

the total of all the reactions that happen in a cell

Question 19

What types of reactions happen in cells?

Answer 19

glucose join to make starch, glycogen, cellulose
lipids formation from glycerol and fatty acids
amino acids combine to form proteins
excess protein broken down to produce urea

Question 20

What is aerobic respiration?

Answer 20

respiration using oxygen

glucose + oxygen—–>carbon dioxide + water +energy

Question 21

symbol equation for aerobic respiration

Answer 21

C6H12O6 + 6O2—–>6CO2 + 6H2O

Question 22

where does aerobic respiration happen?

Answer 22

mitochondria

Question 23

What is anaerobic respiration?

Answer 23

incomplete breakdown of glucose (not using oxygen)

Question 24

When do we use anaerobic respiration?

Answer 24

vigorous exercise

Question 25

What is the product of anaerobic respiration?

Answer 25

lactic acid

Question 26

anaerobic respiration in plants and yeast?

Answer 26

glucose-----> ethanol + carbon dioxide | What is this called? fermentation

Question 27

what happens during exercise?

Answer 27

increased energy demand increased oxygen demand for respiration increased breathing and heart rate more oxygen to tissues or muscles

Question 28

what happens when there isn't enough oxygen?

Answer 28

Anaerobic respiration

Question 29

what happens if you anaerobically respire ?

Answer 29

lactic acid build up =. painful stitch muscle fatigue oxygen debt

Question 30

what is oxygen debt?

Answer 30

amount of oxygen needed to react with built up lactic acid and remove it from cells.