Calvin Cycle

Question 1

what happens in the calvin cycle

Answer 1

CO2 is absorbed
CO2 is reduced to a carbohydrate using ATP and NADPH from light reactions
Occurs in stroma of chloroplast

Question 2

why is it a cycle

Answer 2

bc pool of carbon molecules are modified instead of being used up st each step

Question 3

fixation

Answer 3

adding CO2 to an organic molecule aka making it usable

Question 4

the enzyme

Answer 4

RuBisCO

Question 5

molecule

Answer 5

RuBP

Question 6

Step 1: Fixation

Answer 6

RuBisCo catalyze a reaction between CO2 and RuBP, forming a 6-carbon compound that immediately converts to into 2 3-carbon compounds.

called a fixation bc it’s fixed from its inorganic to organic molecules.

Question 7

Step 2: Reduction

Answer 7

ATP and NADPH use their stored energy to convert the 3-carbon compound, 3-PGA, into another 3-carbon compound called G3P.

called reduction reaction because it involves the gain of electrons. a reduction is the gain of an electron by an atom or molecule. the molecules ADP and NAD+, resulting from the reduction reaction, return to the light-dependent reactions to be re-energized.

Question 8

Step 3: Regeneration

Answer 8

one of the G3P molecules leaves the calvin cycle to form a carbohydrates molecule (glucose). the remaining G3P molecules regenerate RuBP, which enables the system to prepare for the carbon-fixation step. ATP is also used in the regeneration of RuBP