Respiration

Question 0

Define ATP

Answer 0

Adenosine triphosphate (ATP) is an activated nucleotide found in a living cells that acts as an energy carrier. The hydrolysis of ATP leads to the formation of adenosine (ADP) and inorganic phosphate, with the release of energy.

Question 1

What do cells use as their immediate energy source?

Answer 1

They use ATP as their immediate energy source NOT GLUCOSE

Question 2

What happens in cellular respiration?

Answer 2

Glucose is converted into ATP

Question 3

What are the two forms of respiration?

Answer 3

Aerobic (requires oxygen) and anaerobic (takes place in the absence of oxygen)

Question 4

What is aerobic respiration?

Answer 4

Aerobic respiration requires oxygen and produces carbon dioxide, water and much ATP:

C6H12O6 + 602 —> 6CO2 + 6H2O

Question 5

What is anaerobic respiration?

Answer 5

Anaerobic respiration takes place in the absence of oxygen and produces lactate (in animals) or ethanol and carbon dioxide (in plants) but only a little ATP in both cases.

Question 6

Which type of respiration has four stages?

Answer 6

Aerobic respiration

Question 7

What are the four stages of aerobic respiration?

Answer 7

Gycolysis
Link reaction
Krebs cycle
Electron transport chain (oxidative phosphorylation)

Question 8

What happens in glycolysis in aerobic respiration?

Answer 8

6-carbon glucose molecule is split into two 3-carbon pyruvate molecules.

Question 9

What happens in the link reaction?

Answer 9

3-carbon pyruvate is converted into carbon dioxide and a 2-carbon acetylcoenzyme A

Question 10

What happens in the kerbs cycle?

Answer 10

Acetylcoenzyme A is introduced into a cycle of oxidation-reduction reactions that yield some ATP and a large number of electrons.

Question 11

What is anaerobic respiration also known as?

Answer 11

Fermentation