Biology 101

Question 1

What is photosynthesis?

Answer 1

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

Question 2

What are the two main stages of photosynthesis?

Answer 2

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

Question 3

Where does photosynthesis take place in a plant cell?

Answer 3

Photosynthesis takes place in the chloroplasts of plant cells.

Question 4

What is the primary pigment involved in photosynthesis?

Answer 4

Chlorophyll is the primary pigment involved in photosynthesis.

Question 5

What is the overall chemical equation for photosynthesis?

Answer 5

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

Question 6

During which stage of photosynthesis is oxygen released?

Answer 6

Oxygen is released during the light-dependent reactions.

Question 7

What is the purpose of the Calvin Cycle?

Answer 7

The purpose of the Calvin Cycle is to produce glucose (sugar) using ATP and NADPH generated during the light-dependent reactions.

Question 8

What are the products of the light-dependent reactions?

Answer 8

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

Question 9

What is the role of water in photosynthesis?

Answer 9

Water is split during the light-dependent reactions to provide electrons for the photosystems and to release oxygen as a byproduct.

Question 10

What is the source of carbon dioxide for photosynthesis?

Answer 10

The source of carbon dioxide for photosynthesis is the air.

Question 11

What is the significance of photosynthesis in the ecosystem?

Answer 11

Photosynthesis is significant in the ecosystem as it is the primary process that produces oxygen and food for other organisms.

Question 12

What is the role of light in photosynthesis?

Answer 12

Light is the energy source that drives the process of photosynthesis.

Question 13

What is the function of stomata in photosynthesis?

Answer 13

Stomata are small openings on leaves that allow carbon dioxide to enter and oxygen to exit during photosynthesis.

Question 14

What factors can affect the rate of photosynthesis?

Answer 14

Factors such as light intensity, temperature, and carbon dioxide concentration can affect the rate of photosynthesis.

Question 15

What is the relationship between photosynthesis and cellular respiration?

Answer 15

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

Question 16

What is the role of ATP and NADPH in photosynthesis?

Answer 16

ATP and NADPH are energy carriers that are used to fuel the Calvin Cycle and produce glucose.

Question 17

What is the main function of the thylakoid membrane in photosynthesis?

Answer 17

The main function of the thylakoid membrane is to house the photosystems that capture light energy during the light-dependent reactions.

Question 18

What is photophosphorylation in photosynthesis?

Answer 18

Photophosphorylation is the process of generating ATP using the energy of sunlight during the light-dependent reactions.

Question 19

What is the role of the electron transport chain in photosynthesis?

Answer 19

The electron transport chain helps generate a proton gradient that is used to produce ATP during photosynthesis.

Question 20

What is the significance of photosynthesis in the carbon cycle?

Answer 20

Photosynthesis plays a crucial role in the carbon cycle by converting carbon dioxide into organic compounds that can be used by living organisms.

Question 21

What is the importance of photosystem II in photosynthesis?

Answer 21

Photosystem II is essential for splitting water molecules to release electrons, protons, and oxygen during the light-dependent reactions.

Question 22

What is the role of rubisco in photosynthesis?

Answer 22

Rubisco is an enzyme that catalyzes the first step of the Calvin Cycle by fixing carbon dioxide to produce sugars.

Question 23

How does the concentration of carbon dioxide affect photosynthesis?

Answer 23

An increase in the concentration of carbon dioxide can enhance the rate of photosynthesis, as it is a key reactant in the process.

Question 24

What is the significance of photosynthesis in the food chain?

Answer 24

Photosynthesis is the primary source of energy for most living organisms in the food chain, as it produces organic compounds that are consumed by other organisms.