Topic E (Respiration and Photosynthesis)

Question 1

Respiration

Answer 1

Obtaining energy from food

Question 2

What are the two types of respiration?

Answer 2

Aerobic/Anaerobic

Question 3

What type of respiration releases more energy?

Answer 3

Aerobic

Question 4

In what two forms energy is released?

Answer 4

Heat + Chemical energy

Question 5

Word equation for aerobic respiration

Answer 5

Glucose + Oxygen –> Water + Carbon dioxide + energy

Question 6

What is the chemical formula of glucose?

Answer 6

C6H12O6

Question 7

Symbolic equation for aerobic respiration

Answer 7

C6H12O6 + 6O2 –> 6CO2 + 6H2O + energy

Question 8

What is the reverse process of aerobic respiration?

Answer 8

Photosynthesis

Question 9

Difference between aerobic and anaerobic respirations

Answer 9

Anaerobic doesn’t use oxygen + its products and reactants are different

Question 10

Word equation for anaerobic respiration in animals

Answer 10

Glucose –> Lactic acid + energy

Question 11

When does the body switch to anaerobic respiration

Answer 11

During vigorous exercise

Question 12

What does the build up of lactic acid in muscles leads to?

Answer 12

Pain and cramp

Question 13

Word equation for anaerobic respiration in plants

Answer 13

Glucose –> Ethanol + Carbon dioxide + energy

Question 14

Word equation for Photosynthesis

Answer 14

Carbon dioxide + water UNDER sunlight + chlorophyl –> Glucose + Oxygen

Question 15

Symbol equation for Photosynthesis

Answer 15

6CO2 + 6H2O –> C6H12O6 + 6O2

Question 16

Factors affecting photosynthesis (5)

Answer 16

1) Temperature 2) Light intensity 3) Light colour (wavelength) 4) Surface area of leaves 5) CO2 concentration

Question 17

What is the worst colour of the light to use for photosynthesis? Why?

Answer 17

Green, all of it gets reflected

Question 18

How does CO2 concentration affect the rate of photosynthesis

Answer 18

Usually the limited factor , low concentration in air

Question 19

How does temperature affect the rate of photosynthesis?

Answer 19

Optimum temperature for enzymes

Question 20

What is the limiting factor?

Answer 20

A factor which when increases results in the overall rate increasing

Question 21

How many limiting factors can there be at one moment?

Answer 21

Only ONE

Question 22

Adaptations of leaves to photosynthesis (4)

Answer 22

1) Broad 2) Most chloroplasts found in the palisade layer 3) Upper epidermis is transparent 4) Waxy cuticle

Question 23

What is the top layer of the leaf called?

Answer 23

Palisade layer

Question 24

How the breadth of leaves affect photosynthesis?

Answer 24

A larger surface area is exposed to the light

Question 25

How the fact that most chloroplasts found in the palisade layer affect photosynthesis?

Answer 25

It is the layer at the top, more light can get to it

Question 26

How does 'upper epidermis is transparent' affect photosynthesis?

Answer 26

The light can pass to the palisade layer

Question 27

How does waxy cuticle affect photosynthesis?

Answer 27

Reduces water loss through evaporation