How many calories in an Apple Pie?


Of course, there are many different apple pies, and many different serving portions  too!!!

So…let’s do the calculations with a “standar” apple pie…certainly not the best but it is standard, so standard that it is the same all around the world!

Of course, I am talking about the MacDonald Apple pie!

Nutrition facts of the Macdonald baked Apple pie (taken from the label):

Proteins 2g

Fat 13 g

Carbohydrates 32 g

Sodium 170 mg

How many calories are obtained when you eat 1 serving size of this pie?

Question (B-15): Flavoproteins in Krebs Cycle


In this representation of Krebs Cycle, each reaction, is marked with a number.

Select the two reactions that require the participation of Flavoproteins.


a)     1 and 3


b)     2 and 4


c)      3 and 5


d)     4 and 6


e)     5 and 7


f)       6 and 8

Bioenergetics Question B-14



This compound dissipates the electrochemical gradient between the intermembrane space and the mitochondrial matrix, consequently the electron transportation takes place but not the synthesis of ATP


a)     Antimycin B

b)     Carbon Monoxide

c)      Oligomycin

d)     Rotenone

e)     UCP

Q: About the production of NADH in the Krebs Cycle


Cycle_de_krebs numerado

In this representation of Krebs Cycle, each reaction is marked with a number.  The reactions where NAD+ is reduced to NADH.H+ are those marked with the numbers:


a)     1,3 and 4


b)     3,4 and 5


c)      3,4 and 6


d)     3,4 and 8


e)     5,6 and 7


f)       4,5 and 6

NADH.H+ Reoxidation during Anaerobic Conditions





(CM-15) During strenuous exercise, the NADH formed in the glyceraldehyde 3-phosphate dehydrogenase reaction in skeletal muscle must be reoxidized to NAD+ if glycolysis is going to continue.  The most important reaction involved in the reoxidation of NADH in anaerobic conditions is:


a)     Dihydroxyacetone phosphate to  glycerol 3-phosphate



b)     Glucose 6-phosphate  to  fructose 6-phosphate



c)      Glucose 6 (P) to Phosphogluconate



d)     Isocitrate  to a-ketoglutarate



e)     oxalacetate to  malate



f)       malate to oxalacetate



g)     pyruvate to  lactate



Q: About Red Blood Cell Bioenergetics


Which of the following metabolic pathways is the main source of energy for Red Blood Cells in anorexic patients?


a)     Anaerobic glycolysis


b)     Aerobic Glycolysis


c)      Beta-oxidation


d)     Ketolysis


e)     Pentose phosphate cycle.