Photosynthesis

Question 1

What is photosynthesis?

Answer 1

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

Question 2

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

Answer 2

False: Photosynthesis occurs in the chloroplasts of plant cells.

Question 3

What are the two main stages of photosynthesis?

Answer 3

The two main stages of photosynthesis are the light-dependent reactions and the light-independent reactions (Calvin cycle).

Question 4

Fill in the blank: The primary pigment involved in photosynthesis is called _____ .

Answer 4

chlorophyll

Question 5

What is the overall equation for photosynthesis?

Answer 5

6CO2 + 6H2O + light energy -> C6H12O6 + 6O2

Question 6

Which gas is a byproduct of photosynthesis?

Answer 6

Oxygen (O2) is a byproduct of photosynthesis.

Question 7

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

Answer 7

C) Glucose

Question 8

What is the role of water in photosynthesis?

Answer 8

Water is split during the light-dependent reactions to provide electrons and protons, and oxygen is released as a byproduct.

Question 9

True or False: The Calvin cycle requires light to occur.

Answer 9

False: The Calvin cycle does not require light directly, but it uses ATP and NADPH produced in the light-dependent reactions.

Question 10

What is the function of stomata in plants?

Answer 10

Stomata are small openings on the surface of leaves that allow gases, such as carbon dioxide and oxygen, to enter and exit the plant.

Question 11

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

Answer 11

thylakoid membranes

Question 12

What is the primary source of energy for photosynthesis?

Answer 12

The primary source of energy for photosynthesis is sunlight.

Question 13

Multiple Choice: Which of the following molecules is produced during the Calvin cycle? A) ATP B) Glucose C) NADPH D) Oxygen

Answer 13

B) Glucose

Question 14

What role do chloroplasts play in photosynthesis?

Answer 14

Chloroplasts are the organelles where photosynthesis takes place, containing chlorophyll and other pigments.

Question 15

True or False: Photosynthesis occurs only during the day.

Answer 15

False: While light is necessary for the light-dependent reactions, the Calvin cycle can occur both day and night.

Question 16

What are the three main inputs for photosynthesis?

Answer 16

The three main inputs for photosynthesis are carbon dioxide, water, and sunlight.

Question 17

Fill in the blank: The process of converting solar energy into chemical energy occurs during the _____ reactions.

Answer 17

light-dependent

Question 18

What is the significance of photosynthesis for life on Earth?

Answer 18

Photosynthesis is crucial for producing oxygen and organic compounds that serve as food for nearly all living organisms.

Question 19

Multiple Choice: Which of the following best describes the Calvin cycle? A) Energy-producing process B) Sugar-producing process C) Water-splitting process D) Oxygen-releasing process

Answer 19

B) Sugar-producing process

Question 20

What happens to the oxygen produced during photosynthesis?

Answer 20

The oxygen produced during photosynthesis is released into the atmosphere as a byproduct.

Question 21

True or False: Chlorophyll absorbs green light most effectively.

Answer 21

False: Chlorophyll absorbs blue and red light most effectively, reflecting green light.

Question 22

What is the role of NADPH in photosynthesis?

Answer 22

NADPH acts as a reducing agent that provides the electrons needed for the Calvin cycle to synthesize glucose.

Question 23

Fill in the blank: The energy from sunlight is captured and stored in the form of _____ and _____ during the light-dependent reactions.

Answer 23

ATP and NADPH

Question 24

What is the function of RuBisCO in the Calvin cycle?

Answer 24

RuBisCO is an enzyme that catalyzes the fixation of carbon dioxide into organic molecules.

Question 25

Multiple Choice: Which of the following factors can affect the rate of photosynthesis? A) Light intensity B) Carbon dioxide concentration C) Temperature D) All of the above

Answer 25

D) All of the above

Question 26

What is the relationship between photosynthesis and cellular respiration?

Answer 26

Photosynthesis produces glucose and oxygen, which are used in cellular respiration to produce ATP, while cellular respiration releases carbon dioxide and water, which are used in photosynthesis.

Question 27

True or False: All living organisms perform photosynthesis.

Answer 27

False: Only plants, algae, and some bacteria perform photosynthesis.

Question 28

What are the end products of the light-dependent reactions?

Answer 28

The end products of the light-dependent reactions are ATP, NADPH, and oxygen.

Question 29

Fill in the blank: The _____ cycle is also known as the Calvin-Benson cycle.

Answer 29

Calvin

Question 30

Multiple Choice: In which part of the chloroplast does the Calvin cycle take place? A) Thylakoid B) Stroma C) Cytoplasm D) Inner membrane

Answer 30

B) Stroma

Question 31

What is the role of ATP in photosynthesis?

Answer 31

ATP provides the energy required for the biochemical reactions in the Calvin cycle.

Question 32

True or False: Photosynthesis only occurs in terrestrial plants.

Answer 32

False: Photosynthesis also occurs in aquatic plants and algae.

Question 33

What are the differences between C3, C4, and CAM photosynthesis?

Answer 33

C3 plants fix carbon directly into a 3-carbon compound, C4 plants first fix carbon into a 4-carbon compound, and CAM plants separate carbon fixation and the Calvin cycle temporally to conserve water.

Question 34

Fill in the blank: The light-dependent reactions convert _____ energy into chemical energy.

Answer 34

solar

Question 35

What is the primary function of pigments in photosynthesis?

Answer 35

Pigments absorb light energy and transfer it to chlorophyll for photosynthesis.