Photosynthesis (3.5)

Question 1

What is photosynthesis?

Answer 1

Process of capturing energy from the sun to produce sugars

Question 2

What was responsible for the production of oxygen in the atmosphere?

Answer 2

Prokaryotic photosynthesis

Question 3

Photosynthetic pathways are the foundation of what?

Answer 3

Eukaryotic photosynthesis

Question 4

What occurs during light-dependent reactions?

Answer 4

Light energy is captured by using light-absorbing molecules and transformed to chemical energy

Question 5

What are light-absorbing molecules called?

Answer 5

Pigments

Question 6

Where is chemical energy temporarily stored?

Answer 6

Carrier molecules (NADPH)

Question 7

Light dependent reactions help facilitate what?

Answer 7

ATP synthesis

Question 8

What happens during the Calvin cycle step of light-dependent reactions?

Answer 8

ATP and NADPH transfer stored chemical energy to power the production of organic molecules in another pathway

Question 9

What is a result of water hydrolysis?

Answer 9

Oxygen

Question 10

What absorbs energy from light during photosynthesis?

Answer 10

Chlorophylls

Question 11

What do chlorophylls convert light energy to?

Answer 11

Light-energy electrons

Question 12

How is a proton gradient established?

Answer 12

Chlorophyll electrons are energized from light absorption

Question 13

What happens to NADP+ chlorophyll electrons are energized?

Answer 13

They are reduced to NADPH

Question 14

Where are photosystems I and II found?

Answer 14

Imbedded in internal membranes of chloroplasts

Question 15

What is a photosystem?

Answer 15

A light capturing unit that contains chlorophyll in the ETC in a chloroplast’s thylakoid membrane

Question 16

What creates the electron/proton gradient in the thylakoid?

Answer 16

H molecules are released into the thylakoid space after hydrolysis occurs

Question 17

What is the electrochemical/proton gradient?

Answer 17

Difference in concentration of protons (H ions) across a membrane

Question 18

What kind of transport is used to generate ATP from ADP?

Answer 18

Passive transport

Question 19

What is ATP synthase?

Answer 19

Enzyme that creates ATP when protons pass through it

Question 20

What is an organic molecule created during the calvin cycle?

Answer 20

Carbohydrates

Question 21

What is used during the calvin cycle?

Answer 21

ATP, NADPH, and CO2

Question 22

Why are products from light reactions during photosynthesis important for the calvin cycle?

Answer 22

They are needed to produce organic molecules

Question 23

Where do plants and other organisms mainly get CO2 from?

Answer 23

The environment

Question 24

H2O is _______ during photosynthesis?

Answer 24

Oxidized to O2 (lose electrons)

Question 25

CO2 is _________ during photosynthesis?

Answer 25

Reduced to glucose (G3P) (gain electrons)

Question 26

What are the steps for photosynthesis?

Answer 26

1. Light reaction (ETC)
2. Calvin cycle

Question 27

What is the equation for photosynthesis?

Answer 27

CO2+H2O —-> C6H12O6+O2

Question 28

Where does the light reaction step of photosynthesis occur?

Answer 28

Thylakoid

Question 29

Where does the calvin cycle step of photosynthesis occur?

Answer 29

Stroma

Question 30

What is another word for the calvin cycle?

Answer 30

Dark reaction

Question 31

What step of cellular respiration is the calvin cycle comparable to?

Answer 31

The krebs cycle

Question 32

What is produced during the calvin cycle?

Answer 32

G3P/glucose, NADPH+, ADP, and Pi

Question 33

What is used during the light reaction step of photosynthesis?

Answer 33

H2O, light energy, and NADP+

Question 34

What is produced during the light reaction step of photosynthesis?

Answer 34

NADPH, ATP, and O2

Question 35

What are used as energy sources for the calvin cycle?

Answer 35

NADPH and ATP