Just wondering . . .?

Question

1. Many organisms are able to survive withouth producing energy.

a) true

b) false

2. The Krebs Cycle begins and ends with the same compounds.

a) true

b) false

3. The electron transport chain produces more ATP molecules than glycolysis does.

a) true

b) false

4. Pruvic acid is converted into acetyl-CoA which is _____.

a) used as cellular energy

b) used to synthesize glucose

c) used in the Krebs Cycle

d) both b and c

Answer 1

1.  No organism produces energy because the laws of thermodynamics tell us that "energy can neither be created nor destroyed", so the answer has to be True.

2.  Cycles, by definition, begin and end with the same components.

3.  Yep, that's the whole point of it, otherwise our cells would just go through glycolysis.

4.  Acetyl CoA is the molecule that enters the Kreb's cycle.  The Kreb's cycle completes the catabolism of glucose, it doesn't synthesize glucose.

Answer 2

1. Technically, nothing produces energy.  That would violate the First Law of Thermodynamics.

2. True;

3. True.

4. C in animals, D in plants and some other organisms.

Answer 3

youre not just wondering.. is this your homework? you really wont learn it unless you do it, but...

B

A

A

D