Chapter 10

Question 1

what is the overall equation for photosynthesis?

Answer 1

6CO2 + 6H2O → C6H12O6 + 6O2

Question 2

where does photosynthesis occur?

Answer 2

the chloroplast

Question 3

what reaction occurs in the thylakoid of chloroplast?

Answer 3

light-dependent reaction

Question 4

what is a photosystem?

Answer 4

functional and structural units of protein complexes involved in photosynthesis

Question 5

How are PSI and PSII different from each other?

Answer 5

The PSII special pair absorbs best at 680 nm, while the PSI special absorbs best at 700 nm

Question 6

How does PSI and PSII work together during light reactions?

Answer 6

an electron that’s excited in PSII is passed down an electron transport chain to PSI

Question 7

Describe chemiosmosis during light reactions

Answer 7

Chemiosmosis is the movement of ions across a semipermeable membrane from a region of higher concentration to a lower concentration. During light reaction, photolysis of water generates protons which accumulate in the lumen

Question 8

How is ATP generated during chemiosmosis?

Answer 8

The flow of protons back into the matrix of the mitochondrion via ATP synthase provides enough energy for ADP to combine with inorganic phosphate to form ATP

Question 9

how does carbon enter the Calvin cycle?

Answer 9

-through the stomata

Question 10

what is rubisco?

Answer 10

-the enzyme responsible for the fixation of carbon derived from atmospheric CO2

Question 11

what is the significance of G3P?

Answer 11

itsthe prime end-product of photosynthesis

Question 12

how many G3P exit the Calvin cycle per three CO2 fixed?

Answer 12

-One exits the cycle

Question 13

what are the remaining G3P used for?

Answer 13

-the other five must be recycled to regenerate three molecules of the RuBP acceptor

Question 14

summarize the Calvin cycle

Answer 14

a process that plants and algae use to turn carbon dioxide from the air into sugar, the food autotrophs need to grow.

Question 15

what are the products of the Calvin cycle?

Answer 15

-2 G3P molecules, 3 ADP, and 2 NADP+

Question 16

Summarize the light reactions

Answer 16

-use stored chemical energy from the light-dependent reactions to “fix” CO2 and create a product that can be converted into glucose.

Question 17

what are the products of light reactions?

Answer 17

-ATP, NADPH, and O2

Question 18

what reaction occurs in the stroma of the chloroplast?

Answer 18

-The stroma is where the light-independent reaction process of photosynthesis, also called the carbon cycle, takes place.

Question 19

describe the three phases of the Calvin cycle

Answer 19

The Calvin cycle has three stages
stage 1:
-the enzyme RuBisCO incorporates carbon dioxide into an organic molecule

stage 2:
-the organic molecule is reduced.

stage 3
-RuBP, the molecule that starts the cycle, is regenerated so that the cycle can continue.