Respiration: Step 1

Question 1

Where does glycolosis happen?

Answer 1

= in the cytoplasm

Question 2

Does this happen in what kind of respiration?

Answer 2

= aerobic and anaerobic respiration

Question 3

What are the 3 steps of glycolosis?

Answer 3

= phosphorylating glucose to glucose phosphate using ATP
= production of triphosphate
= oxidation of triosphosphate to produce pryuvate with a net gain of ATP and reduced NAD
*2 atp is used

Question 4

What happens first?

Answer 4

= glucose (6C)
= glucose is phosphyrlated (so phosphate binds to another molecule, makes it more reactive and transfers energy from ATP hydroysis)
= forms glucose phosphate, these are 2 ATP’s are used, hydrolyse both of them to release the phosphate and add a phosphate group on opposite sites
= produces glucose phosphate- splits into 2 triosphosphate

Question 5

What happens next?

Answer 5

= we start with x 2 triosphosphate- 3C
= both of these are oxidised, as NAD co-enzyme is picking up a hydrogen from the triosphoshate reduced NAD
= oxidised to form pyruvate, the phosphate head is removed, this is used in ATP synthesis, ADP + pi => ATP
= releases 2 ATP
= there is 2 molecules of pryuvate
= net gain o

Question 6

What is produced in this stage?

Answer 6

= 2 molecules of pryuvate
= net gain of 2 ATP
= and 2 reduced NAD