Glucose And Glycolyisis

Question 1

How does the Sodium gluose transporter work

Answer 1

iTunes the [] gradient for sodium inwards into the cell to provide the energy to drive glucose up its concentration gradient from a low [] gradient t hig in the epithelial cells

Question 2

What is produced from glycolysis ?

Answer 2

NADH
2 ATP net (uses 2)
C6 and c3 intermediates

Question 3

Features of glycolysis

Answer 3

Ecergonic 
Oxidative 
Occurs in all tissues cytosolic 
Can operate anaerobically 
Irreversible 
C6 to 2c3

Question 4

What enzymes are involved in glycolysis and what do they do

Answer 4

Hexokinase- glucokinase in the liver -
- converts gluose to glucose 6P

Phosphofructokinase-1
-key control enzyme
Converts fructose-6-P to fructose 16 bisphosphate

Pyruvate kinase
-converts Phosphoenolpyruvate to pyruvate

Question 5

Which stages of glycolysis are irreversible?

Answer 5

1,3 and 10

Step 3 is the committing step- the rate limiting step

Question 6

what organs can metabolise lactate into pyruvate

Answer 6

the liver and kidney: this allows pyruvate to go through gluconeogenesis to form glucose. Glucose can feed into glycolysis, be fed into circulation, or be used for storage

In the heart|: pyruvate is oxidised directly for energy

Question 7

What are the three key enzymes in glycolysis?

Answer 7

Hexokinase

pyruvate kinase

Phosphofructokinase-1

Question 8

what is the rate limiting enzyme of glycolysis

Answer 8

phosphofructokinase