Question

QUESTION 9 In skeletal muscle under anaerobic conditions, pyruvate is further reduced to lactate. What is the net equation for the payoff phase of glycolysis? glyceraldehyde-3-phosphate + 2 ATP + Pi ---> lactone + NAD+ glucose+2ATP - 2Glyceraldehyde-3-Phosphate + 2ADP + 2H+ 2glyceraldehyde-3-phosphate + 4ADP + 2Pi >2Lactate + 4ATP None of the above

Answer 1

Question9. Glyceraldehyde 3 phosphate + 2ATP + Pi ------- Lactone + NAD+

In the absence of oxygen , pyruvate and NADH build up in cell. So pyruvate is converted to lactate by using energy from NADH and is converted to NAD+ , so that NAD+ can be used again to continue glycolysis.

Question 14. 7/6

The number of total carbon atoms bonded to hydrogen in one glucose molecule is seven, and there are a total of six carbon atoms in one glucose molecule. So the ratio of C-H to C is 7 is to 6 or 7/6.

Question29. Seeds have limited amount of space and fatty acids are most enery dense macromolecule.

Lipids are stored aminly in seeds because seeds need more energy for germination and so more fat is stored as reserve in the small space of seeds to provide more energy. So that during germination these fat is broken down to acetylcoA and can be used to generate ATP.

Question 30 Glucose does not remain as glucose after entering the cell

Once glucose enters into the cell , the glucose is immediately converted to glucose6 phosphate by hexokinase, and thus the concentartion of glucose inside the cell remain low when compaired to plasma. Glucose 6 phosphate then undergo glycolysis.

Question 37. Glucose is immediately phosphorylated by Hexokinase.

Glucose from its region of high concentration in blood enters into the cell . Once inside the cell glucose is immediately converts to glucose 6 phospahete through phosphorylation with the help of enzyme Hexokinase in expense of ATP. The negative charge of phosphate group prevents the glucose from moving across the cell membrane and make it more likely to undergo glycolysis.

Question 38. The phosphate on glucose -6- phosphate prevents it from diffusing across the plasma membrane.

Glucose can more readily diffuse through the cell membrane, while phosphorylated glucose (glucose-6-phosphate) cannot. The negative charge of phosphate group prevents the glucose 6 phosphate cross the cell membrane. This is also the main reason for the glucose once entered into the cell is not evacuvated outside due to the conversion to glucose-6-phosphate. So glucose 6 phosphate cannot be administrated intravenously.