Photosynthesis

Question 2

What is photosynthesis?

Answer 2

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose.

Question 3

What are the main products of photosynthesis?

Answer 3

The main products of photosynthesis are glucose and oxygen.

Question 4

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

Answer 4

False: Photosynthesis occurs in the chloroplasts of plant cells.

Question 5

Fill in the blank: The process of photosynthesis uses _____ energy from the sun.

Answer 5

light

Question 6

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

Answer 6

Chlorophyll

Question 7

What is the chemical equation for photosynthesis?

Answer 7

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

Question 8

Which gas is taken in by plants during photosynthesis?

Answer 8

Carbon dioxide (CO2)

Question 9

Multiple Choice: Which of the following is NOT a reactant in photosynthesis? A) Water B) Oxygen C) Carbon Dioxide D) Light

Answer 9

B) Oxygen

Question 10

What is the role of sunlight in photosynthesis?

Answer 10

Sunlight provides the energy needed to drive the chemical reactions in photosynthesis.

Question 11

True or False: Photosynthesis occurs only during the day.

Answer 11

True: Photosynthesis primarily occurs during daylight when sunlight is available.

Question 12

What are the two main stages of photosynthesis?

Answer 12

The light-dependent reactions and the light-independent reactions (Calvin cycle).

Question 13

Fill in the blank: The light-dependent reactions of photosynthesis take place in the _____ of the chloroplast.

Answer 13

thylakoid membranes

Question 14

What is produced during the light-dependent reactions?

Answer 14

ATP and NADPH, along with oxygen as a byproduct.

Question 15

What is the main purpose of the Calvin cycle?

Answer 15

The Calvin cycle uses ATP and NADPH to convert carbon dioxide into glucose.

Question 16

True or False: All plants perform photosynthesis.

Answer 16

False: Not all plants perform photosynthesis; some are parasitic.

Question 17

What factors affect the rate of photosynthesis?

Answer 17

Light intensity, carbon dioxide concentration, temperature, and water availability.

Question 18

Multiple Choice: Which of the following increases the rate of photosynthesis? A) Decreased light intensity B) Increased carbon dioxide levels C) Increased temperature beyond optimal levels D) Decreased water availability

Answer 18

B) Increased carbon dioxide levels

Question 19

What is the significance of photosynthesis to life on Earth?

Answer 19

Photosynthesis produces oxygen and organic compounds, forming the basis of the food chain and supporting life.

Question 20

Fill in the blank: The process of photosynthesis helps to reduce _____ levels in the atmosphere.

Answer 20

carbon dioxide

Question 21

What happens to the glucose produced during photosynthesis?

Answer 21

Glucose can be used for energy, stored as starch, or used to build other organic molecules.

Question 22

True or False: Chloroplasts are found in all cells of a plant.

Answer 22

False: Chloroplasts are primarily found in the leaf cells of plants.

Question 23

What is the role of water in photosynthesis?

Answer 23

Water provides electrons and protons needed for the light-dependent reactions and is a source of oxygen.

Question 24

Multiple Choice: Which of the following is NOT a product of the light-dependent reactions? A) ATP B) NADPH C) Glucose D) Oxygen

Answer 24

C) Glucose

Question 25

What is photophosphorylation?

Answer 25

Photophosphorylation is the process of generating ATP from ADP and inorganic phosphate using light energy.

Question 26

True or False: The Calvin cycle does not require light directly.

Answer 26

True: The Calvin cycle can occur in the dark as it uses products from the light-dependent reactions.