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|  موضوع: mcq in biophysics & lipids  21/03/10, 09:08 am | |
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1. Which one of the following molecules is least
likely to act as a detergent at pH 7.0?
a || b || c || d || e .
Ans:E
2. Urea is a water-soluble excretion product of
nitrogen metabolism. How many hydrogen bonds can it donate to the
oxygens of water?
O
//
H-N-C-N-H
H H
urea
Ans:C
3. The H2PO4-/HPO42- system has a pKa = 6.7. Which of
the following phosphate buffers has the most buffering capacity at pH =
5.7?
· a. 0.01
M buffer
· b. 0.02
M buffer
· c. 0.05
M buffer
· d. 0.10
M buffer
· e. 0.20
M buffer
Ans:E
4. What is the least amount of information required
to calculate the pH of solution containing a mixture of weak acid and
conjugate base? (Let [HA] = the concentration of acid, and [A-] = the
concentration of base.)
Ans:E
5. Which of the following acid/conjugate base pairs
has the highest buffering capacity at pH 7.0?
Ans:B
6. A 45-year-old woman is suffering chronic renal
(kidney) failure. One consequence in an acid-base disturbance. Her blood
chemistry is as follows:
Patient Values
Normal
pH
7.33
7.4
[CO2]
1.0
1.2
[HCO3-]
17
24
The primary acid-base disturbance this patient displays is
Ans:A
7. A 45-year-old woman is suffering chronic renal
(kidney) failure. One consequence in an acid-base disturbance. Her blood
chemistry is as follows:
Patient Values
Normal
pH
7.33
7.4
[CO2]
1.0
1.2
[HCO>3-]
17
24
What is the most important type of
compensation, if any, operating in this patient?
Ans:C |
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بيانات العضو | | الحلم العربى | | عضو ذهبى |
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معلومات العضو | الجنس : 
عدد المساهمات : 781
عدد النقاط : 29115
العمر : 35
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معلومات الاتصال |  |
| | موضوع: رد: mcq in biophysics & lipids 21/03/10, 10:47 am | |
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