Topic 4 - Bioenergetics 4.1 - Photosynthesis 4.2 - Factors that Affect Photosynthesis 4.3 - Aerobic & Anaerobic Respiration 4.4 - Exercise Aqa Higher Gcse Questions

Question 1

What is the primary process by which plants convert light energy into chemical energy?

Answer 1

Photosynthesis

Question 2

In which organelle does photosynthesis primarily occur?

Answer 2

Chloroplast

Question 3

What are the two main stages of photosynthesis?

Answer 3

Light-dependent reactions and the Calvin cycle

Question 4

What is the main pigment involved in photosynthesis?

Answer 4

Chlorophyll

Question 5

Which gas is a byproduct of photosynthesis?

Answer 5

Oxygen

Question 6

Fill in the blank: The equation for photosynthesis can be summarized as 6CO2 + 6H2O + light energy → C6H12O6 + _____.

Answer 6

6O2

Question 7

True or False: Photosynthesis occurs only in green plants.

Answer 7

False

Question 8

What factor largely influences the rate of photosynthesis by providing energy?

Answer 8

Light intensity

Question 9

How does carbon dioxide concentration affect photosynthesis?

Answer 9

Increased CO2 concentration can enhance the rate of photosynthesis.

Question 10

What role does temperature play in photosynthesis?

Answer 10

Temperature affects enzyme activity and can influence the rate of photosynthesis.

Question 11

What is the term for the process of converting glucose into energy in the presence of oxygen?

Answer 11

Aerobic respiration

Question 12

In aerobic respiration, what is the main energy currency produced?

Answer 12

ATP (Adenosine Triphosphate)

Question 13

True or False: Aerobic respiration occurs in the mitochondria of cells.

Answer 13

True

Question 14

What are the three main stages of aerobic respiration?

Answer 14

Glycolysis, Krebs cycle, and electron transport chain

Question 15

Fill in the blank: The primary reactant for aerobic respiration is _____.

Answer 15

Glucose

Question 16

What is the importance of the electron transport chain in aerobic respiration?

Answer 16

It produces the majority of ATP by transferring electrons through a series of proteins.

Question 17

Which molecule acts as the final electron acceptor in aerobic respiration?

Answer 17

Oxygen

Question 18

What is the overall equation for aerobic respiration?

Answer 18

C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP

Question 19

What environmental factor can limit photosynthesis during winter months?

Answer 19

Low light intensity

Question 20

What is the effect of high temperatures on photosynthesis?

Answer 20

High temperatures can denature enzymes and reduce the rate of photosynthesis.

Question 21

How does humidity affect photosynthesis?

Answer 21

High humidity can increase the rate of photosynthesis by preventing water loss.

Question 22

What is photoinhibition?

Answer 22

A reduction in photosynthesis due to excessive light.

Question 23

What is the role of water in photosynthesis?

Answer 23

Water is a reactant that provides electrons and protons for the light-dependent reactions.

Question 24

True or False: All plants perform photosynthesis at the same rate.

Answer 24

False

Question 25

Which type of organism is primarily responsible for photosynthesis in aquatic environments?

Answer 25

Phytoplankton

Question 26

What effect does deforestation have on atmospheric CO2 levels?

Answer 26

It increases atmospheric CO2 levels by reducing the number of trees available for photosynthesis.

Question 27

What is the role of NADPH in photosynthesis?

Answer 27

NADPH is used as a reducing agent in the Calvin cycle.

Question 28

Fill in the blank: The Calvin cycle occurs in the ____ of the chloroplast.

Answer 28

stroma

Question 29

What is the primary source of energy for photosynthesis?

Answer 29

Sunlight

Question 30

How does light quality (wavelength) affect photosynthesis?

Answer 30

Different wavelengths of light are absorbed differently by chlorophyll, affecting photosynthesis efficiency.

Question 31

True or False: Aerobic respiration can occur without oxygen.

Answer 31

False