Photosynthesis

Question 1

What kinds of organisms can perform photosynthesis?

Answer 1

Plants, algae (protists), cyanobacteria (prokaryotes)

Question 2

Photosynthesis uses ____ to produce carbohydrates from CO2 and H2O.

Answer 2

sunlight/solar energy

Question 3

CO2 is reduced to _____.

Answer 3

sugar

Question 4

H2O is oxidized to _____.

Answer 4

oxygen

Question 5

Why are the stomata important?

Answer 5

They facilitate gas exchange.

Question 6

Where does photosynthesis take place?

Answer 6

Within the chloroplasts.

Question 7

Photosynthesis has 2 major steps. What are they?

Answer 7

The light reactions and the Calvin Cycle.

Question 8

Light reactions need _________.

Answer 8

sunlight!

Question 9

Light reactions take place in the ______.

Answer 9

Thylakoids

Question 10

Solar energy is captured to produce ____ and NADPH

Answer 10

ATP

Question 11

_______ is produced as a by-product of the light reactions and is later released.

Answer 11

Oxygen

Question 12

Where does the Calvin Cycle take place?

Answer 12

in the stroma

Question 13

In the Calvin Cycle, the ATP and NADPH created in the light reactions is used to reduce _____ to a carbohydrate.

Answer 13

CO2

Question 14

In plants, ______ absorb specific wavelengths of light. The major types of these are cholorophylls (a and b) and carotenoids.

Answer 14

Pigments

Question 15

As pigments absorb specific wavelengths of light, they become _____.

Answer 15

excited (gaining energy)

Question 16

True or False: In the light reactions, Photosystem 1 comes before Photosystem 2.

Answer 16

FALSE!

Question 17

What is a photosystem made of? Pigment complexes, antenna complex, reaction center and an ____.

Answer 17

electron acceptor

Question 18

Antenna complexes capture and concentrate ____ on the reaction center.

Answer 18

energy

Question 19

The reaction center receives enough energy to give up the electron to the ______.

Answer 19

Electron acceptor

Question 20

Production of ATP in PS2 is called ______.

Answer 20

Photophosphorylation (light supplies e- flow)

Question 21

In Photosystem 2, water is oxidized and is the source for ——?

Answer 21

hydrogen ions for the H+ gradient

Question 22

Chemiosmosis is the same in Photosynthesis as it is in Cellular Respiration because…Electrons are transported over an ETC to produce an H+ gradient that generates ATP by the _____.

Answer 22

ATP Synthase.

Question 23

If in PS1, water is oxidized, then ____ is formed by NADP reductase.

Answer 23

NADPH

Question 24

_____ accepts electrons from the ETC of PS2 and transfers them to the reaction center of PS1.

Answer 24

Plastocyanin (PC)

Question 25

In the Calvin Cycle, what does CO2 Fixation mean?

Answer 25

CO2 joins with RuBP

Question 26

What enzyme catalyzes the reaction when CO2 joins RuBP

Answer 26

Rubisco

Question 27

One CO2 molecule joined with RuBP creates 2 molecules of what?

Answer 27

3PG

Question 28

How many turns of the cycle does it take for RuBP to regenerate and for there to be 1 net G3P molecule left as a product.

Answer 28

3 times

Question 29

CO2 Reduction means that the 3PG reduces to G39 in two steps using the ATP and _____ produced in PS2 and PS1.

Answer 29

NADPH

Question 30

How many times does the cycle turn to make one glucose molecule?

Answer 30

6 times