Biochemical Reactions

• Photosynthesis

• Respiration

• Work in pairs• You will have

to present your results to the class

• Choose one of these reactions

• Briefly summarise what happens

• Why is it important?• Where does it happen?

– Draw and label a detailed diagram of where it happens

Dehydrogenase Activity in Yeast

• Effect of temperature on anaerobic respiration

• What other indicators could you use?

Dehydrogenase Activity in Yeast

• Write a detailed conclusion and evaluation for this experiment

Recap Essay on ATP

• Read someone’s essay• Mark the content out of 20• The structure out of 5• The grammar out of 5

RespirationLesson 1

Respiration

• What is it?• Where does it occur?

Structure of the Mitochondria

• Describe and Explain the Structure of the Mitochondria

Folded inner membrane-increase surface Area – MORE ENZYMESCRISTAE

MATRIX

ATP

• How is it produced?• What is it used for?

• 10 million molecules of ATP are produced every second

Respiration

2 Types

Respiration

• Briefly summarise the 2 types of respiration– Equations– Uses– etc etc etc

Aerobic Respiration

• Does petrol just explode in a car?

Aerobic Respiration

• Gradual progression of steps• Requiring REDOX reactions

Aerobic Respiration

• Is 37 ̊ degrees hot enough to burn a fuel? – Explain your answer

Aerobic RespirationGlucose• What is the chemical formula for

glucose?• What is the molecular mass of

glucose?• How many grams is one mole of

glucose?• How many kJ’s of energy does one

mole of glucose produce?

Aerobic RespirationRESPIRATION STEPS1. Glycolysis2. Link Reaction3. Krebs Cycle4. Electron Transport Chain

GLYCOLYSIS

Aerobic cellular respiration isthe utilisation of oxygen by cellsfor the production of ATP

It is a series of over 20 chemicalreactions that can be divided intofour phases

The first phase is calledGlycolysis and takes

Place in the cell Cytoplasm

Glycolysis involves the breakdownof one molecule of glucose (6C) to form

2 molecules of pyruvic acid (3C) orPyruvate; there is a net production

of two atp moleculesduring this phase

Glucose

2 PyruvicAcid

Glycolysis 2ATP

2ATP

GLYCOLYSIS

Glycolysis takes place in the 1 of cells and begins with the activation of the main respiratory substrate, namely the hexose sugar 2. This activation involves the addition of two 3 molecules provided by two molecules of 4. The resultant activated molecule is known as 5 and in the next stage of glycolysis it is split into two molecules of 6. The third stage entails the oxidation of these molecules by the removal of 7, which is transferred to a carrier called 8. The final stage is the production of the 3 carbon molecule 9 which also results in the formation of two molecules of 10.