bio help please

[joey2007]

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1) If you have a molecule of table sugar, what is the maximum net ATP gain you could expect from these two six-carbon simple sugars hooked together?

a) 36 ATP b) 72 ATP, c) 4 ATP, d) 23 ATP

please help me how to do this problem?

2) The relationship between lactic acid and pyruvic acid is that?

a) lactic acid is formed only in milk
b) lactic acid is formed from pyruvic acid in fermentation.
c) one has phosphate and the other doesn't.
d) one is twice as big (6 C's) and the other is (3 C's)

my textbook got D. The thing is lactic acid is not a 6 carbonds group right? I searched, and found only 4 Cs on it.

 

[gomawum]

1.one molecule of sugar = glucose, and two six-caron simple sugar ( 2 glucose ) is hooked up and each glucose yield 36 atp, so 36 x 2 = 72

2. lactic acid is the product of an-aerobic respiration(fermentation in muscle) from pyruvic acid so answer:B

 

[A8]

1.one molecule of sugar = glucose, and two six-caron simple sugar ( 2 glucose ) is hooked up and each glucose yield 36 atp, so 36 x 2 = 72

2. lactic acid is the product of an-aerobic respiration(fermentation in muscle) from pyruvic acid so answer:B

I agree with gomawum.

The answer for Q.1 is 72, and I think choice B is the answer for Q.2 not D. It might be a typo.

 

[TheWiredNerv]

1)
2) The relationship between lactic acid and pyruvic acid is that?

a) lactic acid is formed only in milk
b) lactic acid is formed from pyruvic acid in fermentation.
c) one has phosphate and the other doesn't.
d) one is twice as big (6 C's) and the other is (3 C's)

my textbook got D. The thing is lactic acid is not a 6 carbonds group right? I searched, and found only 4 Cs on it.

It must be B. The question stem is looking to see how the two molecules are related. They are related by pyruvic acid being converted to lactic acid.

 

[2009er]

1. B
2. B (both lactic acid and pyruvic acid are have 3 C).

 

[raiden117]

For #1, I'd say the answer is A since there is only one glucose molecule in a molecule of table sugar(glucose + fructose). Anyone agree?

http://en.wikipedia.org/wiki/Sucrose

 

[sajjy]

For #1, I'd say the answer is A since there is only one glucose molecule in a molecule of table sugar(glucose + fructose). Anyone agree?

http://en.wikipedia.org/wiki/Sucrose

Interesting....


http://en.wikipedia.org/wiki/Fructose

fructose is also used in glycolysis...but idk..its kinda confusing....