Chapter 8.1: Overview of Photosynthesis

Question 1

What is the conversion of CO₂ into organic compounds during photosynthesis; the first stage of the dark reactions of photosynthesis, in which carbon dioxide from the air is combined with ribulose 1,5-biphosphate?

Answer 1

carbon fixation

Question 2

What range of light does chlorophyll b absorb?

Answer 2

chlorophyll b is an accessory pigment to chlorophyll a, absorbing light in the blue and red-orange ranges

Question 3

What is in photosynthesis, the reactions of the Calvin cycle in which ATP and NADPH from the light-dependent reactions are used to reduce CO₂ and produce organic compounds such as glucose. This involves the process of carbon fixation, or the conversion of inorganic carbon (CO₂) to organic carbon (ultimately carbohydrates)?

Answer 3

light-independent reactions

Question 4

What type of chlorophyll absorbs light in the blue and the red-orange ranges of the visible light spectrum?

Answer 4

chlorophyll b

Question 5

What is in chloroplasts, the semiliquid substance that surrounds the thylakoid system and that contains the enzymes needed to assemble organic molecules from CO₂?

Answer 5

stroma

Question 6

Define carbon fixation

Answer 6

the conversion of CO₂ into organic compounds during photosynthesis; the first stage of the dark reactions of photosynthesis, in which carbon dioxide from the air is combined with ribulose 1,5-biphosphate

Question 7

Where is oxygenic photosynthesis found?

Answer 7

• Found in cyanobacteria, seven groups of algae, and essentially all land plants

Question 8

Define light independent reaction

Answer 8

in photosynthesis, the reactions of the Calvin cycle in which ATP and NADPH from the light-dependent reactions are used to reduce CO₂ and produce organic compounds such as glucose. This involves the process of carbon fixation, or the conversion of inorganic carbon (CO₂) to organic carbon (ultimately carbohydrates)

Question 9

What is an organized complex of chlorophyll, other pigments, and proteins that traps light energy as excited electrons?

Answer 9

photosystems

Question 10

What range of light does chlorophyll a absorb?

Answer 10

Chlorophyll a absorbs light in the violet-blue and the red ranges of the visible light spectrum

Question 11

What is the primary type of light-absorbing pigment in photosynthesis?

Answer 11

chlorophyll

Question 12

What is photosynthesis that does produce oxygen?

Answer 12

oxygenic photosynthesis

Question 13

Define photosystems

Answer 13

an organized complex of chlorophyll, other pigments, and proteins that traps light energy as excited electrons

Question 14

Where are the photosystems located?

Answer 14

thylakoid membrane of chloroplasts

Question 15

After  Using the energy to make ATP and to reduce the compound NADP⁺, and electron carrier, to NADPH what is the last stage of photosynthesis?

Answer 15

 Using the ATP and NADPH to power the synthesis of organic molecules from CO₂ in the air

Question 16

What is in photosynthesis, the reactions in which light energy is captured and used in production of ATP and NADPH. In plants this involves the action of two linked photosystems?

Answer 16

light-dependent reactions

Question 17

After  Capturing energy from sunlight what is the next stage of photosynthesis?

Answer 17

 Using the energy to make ATP and to reduce the compound NADP⁺, and electron carrier, to NADPH

Question 18

Define light-dependent reactions

Answer 18

in photosynthesis, the reactions in which light energy is captured and used in production of ATP and NADPH. In plants this involves the action of two linked photosystems

Question 19

What is the photosynthesis equation?

Answer 19

 6CO₂ + 12H₂O + light –> C₆H₁₂O₆ + 6H₂O + 6O₂

Question 20

What is oxygenic photosynthesis?

Answer 20

photosynthesis that does produce oxygen

Question 21

What is the first stage of photosynthesis?

Answer 21

 Capturing energy from sunlight

Question 22

Where is anoxygenic photosynthesis found?

Answer 22

• Found in purple bacteria, green sulfur bacteria, green nonsulfur bacteria, and heliobacteria

Question 23

What is photosynthesis that doesn’t produce oxygen?

Answer 23

anoxygenic photosynthesis

Question 24

Where does photosynthesis take place?

Answer 24

chloroplasts

Question 26

Define stroma

Answer 26

in chloroplasts, the semiliquid substance that surrounds the thylakoid system and that contains the enzymes needed to assemble organic molecules from CO₂

Question 27

What type of chlorophyll absorbs light in the violet-blue and the red ranges of the visible light spectrum?

Answer 27

chlorophyll a

Question 28

What is anoxygenic photosynthesis?

Answer 28

photosynthesis that doesn’t produce oxygen

Question 29

Define chlorophyll

Answer 29

the primary type of light-absorbing pigment in photosynthesis