GCSE Edexcel biology topic 6 plant structure and photosynthesis

Question 1

What is the primary function of roots in plants?

Answer 1

To anchor the plant and absorb water and nutrients from the soil.

Question 2

True or False: The stem of a plant is responsible for photosynthesis.

Answer 2

False

Question 3

What are the small openings on the underside of leaves called?

Answer 3

Stomata

Question 4

Fill in the blank: The process by which plants convert light energy into chemical energy is called __________.

Answer 4

Photosynthesis

Question 5

What pigment is primarily responsible for capturing light energy in plants?

Answer 5

Chlorophyll

Question 6

Which part of the plant is mainly involved in gas exchange?

Answer 6

Leaves

Question 7

Multiple Choice: What are the products of photosynthesis? A) Oxygen and glucose B) Carbon dioxide and water C) Nitrogen and glucose

Answer 7

A) Oxygen and glucose

Question 8

What is the role of the xylem in plants?

Answer 8

To transport water and minerals from the roots to the rest of the plant.

Question 9

True or False: Photosynthesis occurs in the mitochondria of plant cells.

Answer 9

False

Question 10

What are the two main stages of photosynthesis?

Answer 10

Light-dependent reactions and light-independent reactions (Calvin cycle).

Question 11

Fill in the blank: The process of water loss from plants through stomata is called __________.

Answer 11

Transpiration

Question 12

What is the main gas that plants take in during photosynthesis?

Answer 12

Carbon dioxide

Question 13

Multiple Choice: Which of the following factors does NOT affect the rate of photosynthesis? A) Light intensity B) Temperature C) Soil type

Answer 13

C) Soil type

Question 14

What structure in plant cells contains chlorophyll?

Answer 14

Chloroplasts

Question 15

True or False: All plants perform photosynthesis.

Answer 15

False

Question 16

What is the formula for photosynthesis?

Answer 16

6CO2 + 6H2O + light energy → C6H12O6 + 6O2

Question 17

What is the function of phloem in plants?

Answer 17

To transport sugars and other metabolic products downward from the leaves.

Question 18

Multiple Choice: Which of the following is a byproduct of photosynthesis? A) Oxygen B) Nitrogen C) Carbon monoxide

Answer 18

A) Oxygen

Question 19

What is the role of sunlight in photosynthesis?

Answer 19

It provides the energy needed to drive the reactions.

Question 20

Fill in the blank: The __________ cycle is part of the light-independent reactions of photosynthesis.

Answer 20

Calvin

Question 21

Which part of the plant is primarily involved in water absorption?

Answer 21

Roots

Question 22

True or False: The chlorophyll molecule reflects green light.

Answer 22

True

Question 23

What is the significance of the stomata in leaves?

Answer 23

They allow for gas exchange, letting carbon dioxide in and oxygen out.

Question 24

Multiple Choice: Which of the following conditions would most likely increase the rate of photosynthesis? A) Decreased light intensity B) Increased carbon dioxide concentration C) Lower temperatures

Answer 24

B) Increased carbon dioxide concentration

Question 25

What is the main function of leaves?

Answer 25

To carry out photosynthesis and gas exchange.

Question 26

Fill in the blank: Plants convert __________ energy into chemical energy during photosynthesis.

Answer 26

Light

Question 27

What is the primary role of guard cells?

Answer 27

To regulate the opening and closing of stomata.

Question 28

True or False: Photosynthesis occurs only during the day.

Answer 28

True

Question 29

What are the two main types of vascular tissue in plants?

Answer 29

Xylem and phloem.

Question 30

Multiple Choice: Which of the following is NOT a reactant in photosynthesis? A) Water B) Glucose C) Carbon dioxide

Answer 30

B) Glucose

Question 31

What is the role of the cuticle on plant leaves?

Answer 31

To reduce water loss.

Question 32

Fill in the blank: The __________ is the part of the plant that supports leaves and flowers.

Answer 32

Stem

Question 33

What effect does temperature have on the rate of photosynthesis?

Answer 33

Increasing temperature generally increases the rate up to a certain point, after which it can decrease.

Question 34

True or False: All chloroplasts contain the same amount of chlorophyll.

Answer 34

False

Question 35

What is the function of the leaf epidermis?

Answer 35

To protect the inner tissues and reduce water loss.

Question 36

Multiple Choice: Which of the following is a factor that can limit photosynthesis? A) Light intensity B) Water availability C) All of the above

Answer 36

C) All of the above

Question 37

What is the primary function of chloroplasts?

Answer 37

To carry out photosynthesis.

Question 38

Fill in the blank: The __________ phase of photosynthesis does not require light.

Answer 38

Calvin

Question 39

True or False: Plants can store glucose as starch.

Answer 39

True

Question 40

What is the role of light-dependent reactions?

Answer 40

To convert solar energy into chemical energy in the form of ATP and NADPH.

Question 41

Multiple Choice: Which gas is released as a waste product of photosynthesis? A) Carbon dioxide B) Oxygen C) Nitrogen

Answer 41

B) Oxygen

Question 42

What is the role of NADP+ in photosynthesis?

Answer 42

It acts as an electron carrier during the light-dependent reactions.

Question 43

Fill in the blank: The __________ is the site of photosynthesis within the plant cell.

Answer 43

Chloroplast

Question 44

What is the importance of photosynthesis to life on Earth?

Answer 44

It produces oxygen and organic compounds that are essential for life.