Respiration A2 Y13 EDEXCEL

Why is ATP first USED un glycolysis

• Energy needed to break bonds

• Glucose needs to be made more reactive .

• ALl reactions need energy to get started.

• Because no light is trapped

Where does glycolysis occur ?

• In the matrix of the mitochondria

• In the stroma of the mitochondria

• In the cytoplasm of animal cells

• In the cytoplasm of all cells of all organisms except obligate anaerobes

How many stages of aerobic respiration occur in the mitochondria ?

• 2

• 1

• 3

• 5

When the phosphorylated glucose is split into two 3C sugars, what are the differences between these sugars and pyruvate ?

• The 3C sugar has less H and less energy

• The 3C sugar has more H and more energy

• Pyruvate has more C

• The 3C sugar has more C.

What happens next to pyruvate ?

• It enters the Krebs Cycle

• It enters the link reaction

• It does glycolysis again

• It is reduced

When is the first moment decarboxylation occurs

• Glycolysis

• Krebs

• Link

• Chemiosmosis

What does coenzyme A do ?

• Allows pyruvate to be decarboxylated ?

• Carries the acetyl into the Krebs cycle

• Allows pyruvate to lose H

• Converts pyruvate into a 6C sugar.

Does pyruvate have phosphate in it ?

• Yes

• No

What 2 things come out of pyruvate to make acetyl Co A ?

• H and CO2

• CO2 and energy

• Energy and H

• CO2 nd Co A

How did pyruvate enter the mitochondria ?

• Diffusion through a membrane

• Active transport

• It stays in the cytoplasm

• Diffusion through 2 membranes