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#1
11-10-2011
 USMLE Forums Scout Steps History: Not yet Posts: 55 Threads: 21 Thanked 10 Times in 10 Posts
Carbohydrates, Fat, and Protein Calorie Yield!

Metabolism of 100 g of carbohydrate, 25 g of fat, and 20 g of protein yields approximately how many kilocalories?
(A) 300
(B) 500
(C) 700
(D) 900
(E) 1100

#2
11-10-2011
 USMLE Forums Guru Steps History: 1 + CS Posts: 300 Threads: 22 Thanked 97 Times in 62 Posts Reputation: 107

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#3
11-11-2011
 USMLE Forums Scout Steps History: Not yet Posts: 55 Threads: 21 Thanked 10 Times in 10 Posts

@ dr muhamad can you please explain your calculation? Thanks alot.

#4
11-11-2011
 USMLE Forums Guru Steps History: 1 + CS Posts: 300 Threads: 22 Thanked 97 Times in 62 Posts Reputation: 107

Quote:
 Originally Posted by docnok @ dr muhamad can you please explain your calculation? Thanks alot.
100 *4 =400 carbo coz each 1 gram makes 4 kcal
25 * 9 =225 fat coz each 1 gram makes 9 kcal
20 * 4 =80 protein coz each 1 gram makes 4 kcal

400 + 225 + 80 =705
#5
11-11-2011
 USMLE Forums Scout Steps History: Not yet Posts: 55 Threads: 21 Thanked 10 Times in 10 Posts

@dr.muhamad thanks alot. I have a nbme form 1998 "Usmle 98 pdf" which has some key questions about the real exam. If you are interested e-mail me at elnojeeu@yahoo.com and I can send it to you and we can share our answers. Let ma know.

 Tags Biochemistry-, Step-1-Questions

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