Anabolism Building Blocks

Question 1

How do autotrophs fix carbon?

Answer 1

Calvin cycle

Reductive TCA cycle

Question 2

What are the three phases of the Calvin cycle?

Answer 2

Carboxylation
Reduction
Regeneration

Question 3

How much energy is produced per one CO2 in the Calvin cycle?

Answer 3

3 ATP

2 NADPH

Question 4

What types of organisms use the reductive TCA cycle?

Answer 4

Chemolithoautotrophs

Question 5

Where does nitrogen for nitrogen assimilation come from?

Answer 5

Other organisms
Environment
N2 via nitrogenase

Question 6

How is phosphorus assimilated?

Answer 6

Oxidative phosphorylation

Substrate-level phosphorylation

Question 7

What are common sources of phosphorus?

Answer 7

Inorganic phosphorus
Organic phosphate esters
-present in environment
-hydrolyzed by phosphatases

Question 8

How is sulfur assimilated?

Answer 8

Sulfate reduced to H2S and then used to synthesize cysteine

Cysteine can be used to form sulfur containing organic compounds