Biology - Photosynthesis

Question 1

What is photosynthesis?

Answer 1

The process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

Question 2

Which organelle is primarily responsible for photosynthesis?

Answer 2

Chloroplast.

Question 3

True or False: Photosynthesis occurs in all living organisms.

Answer 3

False.

Question 4

What are the two main stages of photosynthesis?

Answer 4

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

Question 5

Fill in the blank: Photosynthesis converts _____ energy into chemical energy.

Answer 5

solar.

Question 6

What pigment is essential for capturing light energy in plants?

Answer 6

Chlorophyll.

Question 7

In which part of the plant does photosynthesis mainly occur?

Answer 7

In the leaves.

Question 8

What are the inputs required for photosynthesis?

Answer 8

Carbon dioxide, water, and sunlight.

Question 9

What is the primary output of photosynthesis?

Answer 9

Glucose.

Question 10

True or False: Oxygen is a byproduct of photosynthesis.

Answer 10

True.

Question 11

What is the chemical equation for photosynthesis?

Answer 11

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

Question 12

Which type of organisms perform photosynthesis?

Answer 12

Autotrophs, such as plants and some bacteria.

Question 13

What role does water play in photosynthesis?

Answer 13

Water is a reactant that provides electrons and protons for the process.

Question 14

What is the function of stomata in photosynthesis?

Answer 14

Stomata are openings that allow carbon dioxide to enter and oxygen to exit the leaf.

Question 15

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

Answer 15

stroma.

Question 16

What is the role of sunlight in photosynthesis?

Answer 16

Sunlight provides the energy needed to drive the reactions of photosynthesis.

Question 17

What is produced during the light-dependent reactions?

Answer 17

ATP and NADPH.

Question 18

True or False: Photosynthesis only occurs during the day.

Answer 18

True.

Question 19

What is the importance of photosynthesis to life on Earth?

Answer 19

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

Question 20

What factors can affect the rate of photosynthesis?

Answer 20

Light intensity, carbon dioxide concentration, and temperature.

Question 21

Fill in the blank: The green color of plants is due to the presence of _____ in chloroplasts.

Answer 21

chlorophyll.

Question 22

What is a chlorophyll molecule’s role in photosynthesis?

Answer 22

It absorbs light energy to initiate the process.

Question 23

What happens to the glucose produced during photosynthesis?

Answer 23

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

Question 24

What is the difference between autotrophs and heterotrophs?

Answer 24

Autotrophs produce their own food through photosynthesis, while heterotrophs obtain food by consuming other organisms.

Question 25

Fill in the blank: The main sugar produced during photosynthesis is _____ .

Answer 25

glucose.

Question 26

How does carbon dioxide enter the plant?

Answer 26

Through the stomata.

Question 27

What is the role of NADPH in photosynthesis?

Answer 27

It acts as a reducing agent in the Calvin cycle.

Question 28

What is the effect of increased light intensity on photosynthesis?

Answer 28

It generally increases the rate of photosynthesis, up to a certain point.

Question 29

True or False: Plants can perform photosynthesis at night.

Answer 29

False.

Question 30

What is photolysis in the context of photosynthesis?

Answer 30

The process of splitting water molecules using light energy.

Question 31

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

Answer 31

thylakoid.

Question 32

What is the role of RuBisCO in the Calvin cycle?

Answer 32

It catalyzes the fixation of carbon dioxide.

Question 33

How do temperature changes affect photosynthesis?

Answer 33

Extreme temperatures can slow down or halt the photosynthesis process.

Question 34

What is the significance of the oxygen produced during photosynthesis?

Answer 34

It is essential for the respiration of most living organisms.

Question 35

What is the term for organisms that cannot perform photosynthesis?

Answer 35

Heterotrophs.

Question 36

Fill in the blank: Photosynthesis is most efficient in the _____ spectrum of light.

Answer 36

blue and red.

Question 37

What is the relationship between photosynthesis and cellular respiration?

Answer 37

Photosynthesis produces glucose and oxygen, which are used in cellular respiration to produce energy.

Question 38

What happens to the glucose produced if a plant does not use it immediately?

Answer 38

It can be converted to starch for storage.

Question 39

True or False: All plants have the same rate of photosynthesis.

Answer 39

False.

Question 40

What is the main purpose of the light-dependent reactions?

Answer 40

To convert solar energy into chemical energy (ATP and NADPH).

Question 41

What is the process by which plants lose water through stomata called?

Answer 41

Transpiration.