Higher Biology Unit 2. KA2: Cellular Respiration

What is cellular respiration?

• A method to store glucose in cells

• A series of metabolic pathways that break down glucose into ATP

• A cycle to produce carbon dioxide only

• A process to produce oxygen

What compound is ATP broken down into?

• Carbon dioxide and water

• Adenosine diphosphate (ADP) and phosphate

• Glucose and oxygen

• Pyruvate and NADH

Where does glycolysis take place?

• On the cell membrane

• In the nucleus

• In the cytoplasm

• In the mitochondria

What is the net gain of ATP molecules during glycolysis?

• 38 molecules

• 2 molecules

• 4 molecules

• 36 molecules

What happens to pyruvate in the presence of oxygen?

• It is converted into lactate

• It is expelled from the cell

• It moves into the mitochondria for further processing

• It remains unchanged

What is the final electron acceptor in the electron transport chain?

• ATP

• NADH

• Oxygen

• Carbon dioxide

How many molecules of ATP are produced from the electron transport chain?

• 36 molecules

• 4 molecules

• 38 molecules

• 2 molecules

What is produced during fermentation in yeast?

• Lactate

• Ethanol and carbon dioxide

• Water

• Oxygen

What is the role of ATP synthase?

• To produce carbon dioxide

• To break down glucose

• To consume oxygen

• To generate ATP

What is phosphorylation?

• The process of breaking down ATP into ADP

• The addition of a phosphate group to a molecule

• The conversion of pyruvate into lactate

• The removal of a phosphate group from ATP