Question

Please answer all

1. The time interval required for the formation of two cells from one is called the

a. generation time

b. growth time

c. growth rate

d. division rate

2. For each molecule of succinate that is metabolized via the citric acid cycle, how many molecules of CO₂ are generated?

a. 0

b. 1

c. 2

d. 4

3. Methanogenesis is an example of

a. aerobic respiration

b. anaerobic respiration

c. substrate-level phosphorylation

d. photophosphorylation

4.The Calvin cycle

a. is responsible for the fixation of CO₂ into cell material.

b. utilizes both NAD(P)H and ATP.

c. requires both ribulose bisphosphate carboxylase (RubisCO) and phosphoribulokinase.

d. does all of the above.

Answer 1

Please find the answer below:

1. The time interval required for the formation of two cells from one is called the

Answer: a. generation time

Explanation: Generation time, also called as doubling time is the time interval of the formation of the two daughter cells from one. Generation time actually determines the rate of microbial growth.

2. For each molecule of succinate that is metabolized via the citric acid cycle, how many molecules of CO₂ are generated?

Answer: c. 2

Explanation: Two carbons, from the acetyl CoA, enter the citric acid cycle to release two carbon dioxide molecules, oxidising citrate.

3. Methanogenesis is an example of

Answer: b. anaerobic respiration

Explanation: Methanaogenesis is the anaerobic respiration performed by bacteria such as Archaea. These methanogens do not utilize Oxygen for respiration, as Oxygen actually inhibits their growth.

4.The Calvin cycle

Answer: d. does all of the above

Explanation: The Calvin cycle is the set of chemical reactions observed in plants to fix carbon from CO2 into 3 carbon sugars. Calvin cycle uses ATP as well as NADPH to convert CO2 to sugar. The enzyme called ribulose biphosphate carboxylase (RubisCO) is used to catalyze the major step of carbon fixation. In the first step, the enzyme RubisCO uses CO2 into the organic molecule, 3-PGA. Phosphorbulokinase, an essential photosynthetic enzyme, which catalyzes the phosphorylation of ribose 5-phosphate into ribulose 1,5-biphosphate. RubisCO and Phosphoribulokinase are unique features in the Calvin cycle.