6 respiration - glycolisis

what does respiration produce?

ATP

what are the 4 stages of aerobic respiration?

• glycolysis

• link reaction

• krebs cycle

• oxidative phosphorylation

what type of respiration is glycolysis the first stage in?

aerobic and anaerobic

where does glycolysis occur? and what type of process is it?

the cytoplasm and is an anaerobic process

what stages are involved in glycolysis?

1. phosphorylating glucose to glucose phosphate using ATP

2. the production of triose phosphate

3. oxidation of triose phosphate to produce pyruvate with a net gain of ATP and reduced NAD

what happens during the first stage of glycolysis?

glucose has 6 carbons. 2 ATP molecules are hydrolysed to release the phosphate group and one group is added on each end of glucose phosphate

what happens during the second stage of glycolysis?

the energy that was locked up in the bond within ATP is now transferred to the new molecule, glucose phosphate. glucose phosphate is a high energy molecule and highly reactive, which splits into two triose phosphates

what happens during the third stage of glycolysis?

both of those triose phosphate molecules are oxidised. can tell they’re oxidised as the coenzyme, NAD, is picking up a hydrogen from the triose phosphate. so the NAD is converted to NADH. NAD is reduced while the triose phosphate is oxidised. also released two molecules of ATP

what are the products of glycolysis?

• 2x pyruvate

• net gain of 2 ATP

• 2x NADH