Respiration/Photosynthesis

Question 1

What’s respiration?

Answer 1

Chemical reactions to convert chemical energy into ATP.

Question 2

Word equation for aerobic respiration:

Answer 2

glucose + oxygen -> carbon dioxide + water + [ATP]

Question 3

Symbol equation for aerobic respiration

Answer 3

C6H12O6 + 6O2 → 6CO2 + 6H2O

Question 4

What is ATP used for?

Answer 4

• Make new cells and new molecules
• For movement
• To regulate temperature

Question 5

Where does aerobic respiration occur?

Answer 5

In the mitochondria, in the cell.

Question 6

What type of reaction is aerobic respiration?

Answer 6

Exothermic reaction

Question 7

What’s anaerobic respiration?

Answer 7

Same as aerobic respiration, but without oxygen.

Question 8

When does anaerobic respiration happen?

Answer 8

When not enough oxygen is getting to your cells. (When doing exercise for example)

Question 9

What disadvantages does anaerobic respiration have?

Answer 9

• Less efficient (more glucose is needed)
• Produces lactic acid (which is poisonous)
• Can cause cramps when lactic acid builds up

Question 10

Word equation for anaerobic respiration:

Answer 10

glucose -> lactic acid

Question 11

Why is anaerobic respiration less efficient?

Answer 11

It doesn’t completely break down glucose.

Question 12

What’s the oxygen debt?

Answer 12

The oxygen needed to break down lactic acid after anaerobic acid.

Question 13

What can anaerobically respire?

Answer 13

Plants, and some microorganisms.

Question 14

What is it called when microorganisms anaerobically respire?

Answer 14

Fermentation

Question 15

Fermentation word equation:

Answer 15

glucose -> ethanol + carbon dioxide

Question 16

Fermentation symbol equation:

Answer 16

C6H12O6 -> 2(C2H5OH) + 2CO2

Question 17

What’s photosynthesis?

Answer 17

Process in which plants make glucose from sunlight, CO2 and water.

Question 18

Photosynthesis word equation:

Answer 18

carbon dioxide + water -> glucose + oxygen

Question 19

Photosynthesis symbol equation:

Answer 19

6CO2 + 6H2O -> C6H12O6 + 6O2

Question 20

Where does photosynthesis take place?

Answer 20

In the chlorophyll, inside the chloroplasts.

Question 21

Why are most plants green?

Answer 21

Because the cell where photosynthesis takes place (chloroplast) has green pigments (chlorophyll).

Question 22

What happens to glucose after photosynthesis?

Answer 22

• Some glucose is used in respiration (into ATP)
• Some is converted into sugar molecules
• Some is converter to starch

Question 23

How to test for starch in a leaf?

Answer 23

Use iodine test.

Question 24

How can you prove chlorophyll is needed for photosynthesis?

Answer 24

Use a variegated plant, and test for starch for areas of leaf.

Question 25

How can you prove light is needed for photosynthesis?

Answer 25

Cover part of plant and test for starch.

Question 26

How can you prove CO2 is needed for photosynthesis?

Answer 26

Place plant in closed container without CO2 and check for starch.

Question 27

How can you prove oxygen is given off during photosynthesis?

Answer 27

Collect bubbles produced by aquatic plant during photosynthesis, and check if its oxygen (using glowing splint inside oxygen).

Question 28

What are factors that affect rate of reaction called?

Answer 28

Limiting Factors

Question 29

Which factors affect the rate of photosynthesis?

Answer 29

Light intensity, CO2 concentration & temperature.

Question 30

How is rate of reaction calculated?

Answer 30

1 / time (time for measurement to occur)