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Unit 1 KA7 - Cellular Repsiration

Glucose + oxygen ->

Carbon dioxide + water + energy

What is the role of ATP in cells

Transfer of energy
Phosphorylation of molecules

What stage is glycolysis

Stage 1

Where does glycolysis take place?

In the cytoplasm

Gycolysis is one molecule of... broken down into two molecules of...

Glucose
Pyruvate

What doesnt glycolysis require?

Oxygen

Glycolysis involves a series of...

Enzyme controlled reactions

There are two stagex of glycolysis what are they?

Energy investment phase
Energy pay off phase

What is the energy investment phase?

2 ATP are used to phosphorylate intermediates

What is the energy pay off phase?

4 ATP are produced per molecule of glucose

What is required for the phosphorylation of glucose and intermediates during the energy investment phase of glycolysis?

ATP

What does the phosphorylation of glucose and intermediates during the energy investment phase of glycolysis lead yo?

The generation of more ATP during the energy pay off phase resulting in a net gain of ATP

What is released during the energy pay off phase?

H ions and electrons

H ions and electrons combine with which coenzyme?

NAD

What does NAD produce?

NADH

H iond and electrons pass to the electron transport system if oxygen present by

Dehydrogenase enzymes

What stage is the citric acid cycle?

Stage 2

Where is the citric acid cycle located?

In the matrix of the mitochondrion

When does the citric acid cycle only occur?

If oxygen is present

Pyruvate is broken down into an...

Acetyl group

Acetyl group combined witj Coenzyme A to form...

Acetyl CoA

The acetyl group from acetyl coenzyme A combines with... to form...

Oxaloacetate
Citrate

During a series of enzyme controlled strps, citraye is gradually converted back into oxaloacetate which results in what?

The generation of ATP and release of carbon dioxide.

What do dehyrdrogenase enzymes do?

Removes H ions and electrons and pass them to the coenzyme NAD, forming NADH

The H ipns and electrons from NADH are passed to the... on the inner mitochondrial membrane

Electron transport chain

Whathas to happen for ATP synthesis to occur?

Electrons have to pass along the electron transport chain and release energy.

What is the electron transport chain?

It is a series of carrier proteins attached to the inner mitochondrial membrane

What does the energy allow happen? (electro transport chain)

H ions to be pumped across the inner mitochondrial membrane.

The flow of these Ions back through the membrane protein...

ATP synthase results in the production of ATP

H ions and electrons combine with oxygen to form what?

Water

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