Unit 4 - bioenergetics

Question 1

Equation for photosynthesis

Answer 1

Carbon dioxide + water —>glucose + oxygen

Question 2

Symbol equation for photosynthesis

Answer 2

6CO2 + 6H20 —-> C6H12O6 + 6O2

Question 3

How is glucose used in plants

Answer 3

For respiration
Making cellulose (strengthen cell wall)
Stored as starch
Making amino acids (glucose + nitrate ions from soil)

Question 4

Limiting factors for photosynthesis

Answer 4

Light intensity, co2 concentration, temperature

Question 5

Ideal conditions for photosynthesis

Answer 5

Grow them in a greenhouse this helps trap the suns heat

Question 6

What is respiration

Answer 6

Process of transferring energy from glucose which goes on in every cell

Question 7

Examples why respiration is needed

Answer 7

To allow muscles to contract
Keep their body temp constant

Question 8

What is metabolism

Answer 8

All chemical reactions in an organism

Question 9

Equation for aerobic respiration

Answer 9

Glucose + oxygen —> carbon dioxide + water

Question 10

Where does aerobic respiration occur

Answer 10

In the mitochondria

Question 11

Anaerobic respiration equation

Answer 11

Glucose —> lactic acid

Question 12

Where does anaerobic respiration occur

Answer 12

Cytoplasm

Question 13

What is metabolic rate

Answer 13

Rate of chemical reactions in the body

Question 14

Factors that affect a persons metabolic rate

Answer 14

Gender, age, BMI, genetics

Question 15

2 changes someone could make to live longer

Answer 15

Increase exercise, reduce food intake

Question 16

Why is LED light used in photosynthesis RPA

Answer 16

Does not release much heat

Question 17

In photosynthesis RPA what should you do if you are using a normal bulb

Answer 17

Place beaker of water between light and tube this will absorb heat

Question 18

Why is sodium carbonate used in photosynthesis RPA

Answer 18

Releases CO2 which is needed for photosynthesis

Question 19

Problems with photosynthesis RPA

Answer 19

-number of bubbles may be too fast to count
-bubbles are not always sams sizs

Question 20

Alternate way of doing RPA photosynthesis so you don’t have to count bubbles

Answer 20

Instead catches the bubbles in a measuring cylinder so you can then measure the volume of bubbles

Question 21

What is glycogen

Answer 21

Storage form of glucose

Question 22

In cells where do you find lipids

Answer 22

Cell membrane

Question 23

What molecules make a lipid

Answer 23

1 glycerol molecule and 3 fatty acid molecules

Question 24

What is oxygen debt

Answer 24

The amount of extra oxygen the body needs after exercising to deal with accumulated lactic acid

Question 25

What will happen of you use normal light not LED light in photosynthesis RPA

Answer 25

Temperature will cause bubbles of gas to be produced faster and therefore the rate of photosynthesis would be faster

Question 26

Products of anaerobic respiration in plants

Answer 26

Ethanol and carbon dioxide

Question 27

What does metabolism include

Answer 27

-conversion of glucose to starch, glycogen and cellulose -the formation of lipid molecules from a molecule of glycerol and three molecules of fatty acids -The use of glucose and nitrate ions to form amino acids which in turn are used to synthesise proteins -respiration -breakdown of excess proteins to form urea for excretion