Respiration in cells

Question 1

what is the worded equation for cellular respiration?

Answer 1

glucose + oxygen ——> carbon dioxide + water

Question 2

what is the chemical equation for cellular respiration?

Answer 2

C6H12O6 + 6O2 ——-> 6CO2 + 6H20

Question 3

what is the first stage of aerobic respiration?

Answer 3

glycolysis is the first step in the breakdown of glucose to extract energy for cellular metabolism.

• glycolysis occurs without oxygen in the cytoplasm. This breaks down the glucose but as the breakdown is partial only a small amount of energy is released.

Question 4

what is the second stage of aerobic respiration?

Answer 4

in the mitochondria with oxygen, carbon dioxide and water are produced. A large amount of energy is released as there is a complete breakdown of glucose. The energy is trapped in small molecules of ATP.

Question 5

what happens when energy is required?

Answer 5

when energy is required for synthesis reactions, movement (active transport) and reproduction, the ATP breaks down to release energy.

ATP ——> ADP + Pi

Question 6

anaerobic respiration (fermentation) - plants and yeast

Answer 6

in plants and yeast alcoholic fermentation occurs wholly in the cytoplasm without any use of oxygen.

glucose —–> ethanol + carbon dioxide
C6H12O6 ——> 2C2H5OH + 2CO2

Question 7

anaerobic respiration (lactic acid fermentation) - animals

Answer 7

in animals lactic acid fermentation occurs.

glucose —–> lactic acid
C6H1206 —–> 2C3H603