cellular respiration

Question 1

what is cellular respiration?

Answer 1

process in which organic molecules are broken down in the cells to release energy

Question 2

what is the word equation for cellular respiration?

Answer 2

glucose + oxygen — carbon dioxide + water + energy

Question 3

what is the chemical equation for cellular respiration?

Answer 3

C6H12O6 + 6O2 → 6CO2 + 6H2O + (ATP & heat)

Question 4

whatis the first reaction in both aerobic and anaerobic respiration?

Answer 4

• glycolysis = first process in both reactions (partial breakdown of glucose into pyruvic acid
• occurs in cytoplasm

Question 5

what is the process when there is no oxygen available?

Answer 5

anaerobic respiration

Question 6

what happens during anaerobic respiration?

Answer 6

• absence of oxygen
• pyrvuate is convertedinto lactic acid
• 2 ATP formed
• occurs in the cytoplasm

Question 6

what happens during anaerobic respiration?

Answer 6

• absence of oxygen
• pyrvuate is convertedinto lactic acid
• 2 ATP formed
• occurs in the cytoplasm

Question 7

what happens during aerobic respiration?

Answer 7

• when oxygen is available
• pyruvate is broken down into carbon dioxide and water
• occurs in mitochondria
• produces 38 ATP per glucose molecule

Question 8

what is the first step of cellular respiration?

Answer 8

• pyruvate converted into acetyle coenzyme A
  = occurs as the carbon diocide molecule is removed from pyruvate and the reamining two carbon structure joins to coenzyme A

Question 9

what is the first step of cellular respiration?

Answer 9

• pyruvate converted into acetyle coenzyme A
  = occurs as the carbon diocide molecule is removed from pyruvate and the reamining two carbon structure joins to coenzyme A

Question 10

what is the second step of cellular respiration ?

Answer 10

• acetyl CoA enters the citric acid cycle

- carbon atoms in the acetyl CoA are released in carbon dioxide

Question 11

what is the final stage of cellular respiration?

Answer 11

• electron transport system (only stage that uses oxygen)

- electrons are passed between molecules = oxygen molecules form water

Question 12

how is energy used by a cell?

Answer 12

chemical energy
- heat energy 60%
- chemical energy 40% in ATP
= building complex molecules 
= cell division + growth
= active transport 
= movement of cell organelles