Biochemistry - Water, pH and Macromolecules
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Exercise"Success has many fathers, while failure is an orphan."
- (Proverb)
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| 21. |
A solution with pH = 5 is __________ than a solution with pH = 7. |
| A. |
2 times more basic | | B. |
10 times more basic | | C. |
10 times more acidic | | D. |
100 times more acidic |
Answer: Option C
Explanation:
No answer description available for this question. Let us discuss.
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| 22. |
The lone pair electrons on oxygen in a H20 molecule |
| A. |
carry a partial positive charge | | B. |
are not important for the properties of water | | C. |
carry a partial negative charge | | D. |
form covalent bonds in ice |
Answer: Option E
Explanation:
No answer description available for this question. Let us discuss.
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| 23. |
Which of the following statements about water is correct? |
| A. |
It is critical for many of the chemical processes found in living systems | | B. |
Polar substances that can form hydrogen bonds will dissolve in it | | C. |
Nonpolar substances like oils are not soluble in it | | D. |
All of the above |
Answer: Option D
Explanation:
No answer description available for this question. Let us discuss.
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| 24. |
The strength of an acid depends on |
| A. |
number of neutrons gain | | B. |
electronegativity | | C. |
number of double bonds | | D. |
number of protons released |
Answer: Option C
Explanation:
No answer description available for this question. Let us discuss.
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| 25. |
Which of the following statements about covalently bonded molecules is false? |
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Electrons are shared between the atoms that make up the molecule | | B. |
Noncovalent bonds may also be present, especially if the molecule is large | | C. |
Such molecules often result from the interaction of ionized atoms | | D. |
The chemical bonds that hold the molecule together are relatively strong |
Answer: Option B
Explanation:
No answer description available for this question. Let us discuss.
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