Bioenergetics

Question 1

What is the symbol equation for photosynthesis?

Answer 1

The symbol equation for photosynthesis is C6H12O6 + 6H20 > C6H1206 + 602

Question 2

What are the limiting factors of photosynthesis?

Answer 2

The limiting factors of photosynthesis are light intensity, temperature and carbon dioxide levels

Question 3

What are the process of testing leaves for starch?

Answer 3

The process of testing leaves for starch goes as follows:

1. boil the leaf so its soft
2. wash with ethanol to strip the chlorophyll
3. rinse the leaf
4. spread the leaf on a tile
5. add iodine. the leaf will turn black if it contains starch.

Question 4

What does it mean if part of the leaf is yellow?

Answer 4

If part of a leaf is yellow, that means it does not have any chlorophyll therefore it cannot photosynthesise. It also means that it doesn’t have any starch so it will turn brown in iodine rather than iodine

Question 5

How is glucose stored?

Answer 5

Glucose is stored as starch

Question 6

How can you investigate the effect of light intensity on photosynthesis?

Answer 6

You can investigate the effect of light intensity on photosynthesis by placing a lamp near a solution that has been placed inside of a tube and moving the lamp along a ruler to compare the number of bubbles that is produced. If the lamp is further away, there will be less bubble and less light intensity. Breaks have to be taken between reading in order to let the bubbles adjust to the change in light intensity.

Question 7

How do you test for oxygen?

Answer 7

You text for oxygen by seeing if a splint is relighted

Question 8

What is the symbol equation for anaerobic respiration in plants?

Answer 8

The symbol equation for anaerobic respiration is C6H1206 > 2 C2H5OH + 2 CO2

Question 9

What is the word equation for anaerobic respiration in animals?

Answer 9

The word equation for anaerobic respiration is glucose > lactic acid

Question 10

What is the word equation for anaerobic respiration in plants?

Answer 10

The word equation for anaerobic respiration is glucose > ethanol + carbon dioxide

Question 11

What are the uses of glucose?

Answer 11

Glucose is used for respiration, its stored as starch, used to make fats and oils, used to make amino acids for protein (nitrates from the soil needed for this)

Question 12

What is the symbol equation for aerobic respiration?

Answer 12

The symbol equation for aerobic respiration is C6H1206 + 602 > 6C02 +6H20

Question 13

What is the word equation for aerobic respiration?

Answer 13

The word equation for aerobic respiration is glucose + oxygen > carbon dioxide + water + energy

Question 14

What is the test for carbon dioxide?

Answer 14

The test for carbon dioxide is cloudiness in limewater

Question 15

What are the tests for water?

Answer 15

The first test for water is that white hydrous copper sulfate turns blue in the water.
The second test for water is that blue cobalt chloride (paper) will turn pink in reaction to water

Question 16

What is energy needed for?

Answer 16

Energy is needed for chemical reactions, active transport, movement and warmth

Question 17

What is oxygen debt?

Answer 17

Oxygen debt is the amount of oxygen needed to break down lactic acid into CO2 and H20 in the liver

Question 18

What is metabolism?

Answer 18

Metabolism refers to all the chemical reactions in a living organism

Question 19

What is metabolism responsible for?

Answer 19

Metabolism is responsible for respiration, making fats and proteins, breaking down excess protein into urea and turning glucose into starch/cellulose (in plants) or glycogen (in animals)