Discussion
Home ‣ Biochemistry ‣ Water, pH and Macromolecules Comments
- Question
Which of the following organic groups are found in naturally occuring amino acids?
Options- A. Guanidinium ion
- B. Indole
- C. Imidazole
- D. All of these
- Correct Answer
- All of these
- 1. The pH of a solution is determined by
Options- A. concentration of salt
- B. relative concentration of acids and bases
- C. dielectric constant of the medium
- D. environmental effect Discuss
- 2. The dissociation constant of H2O at 25° C is
Options- A. 10-14 M
- B. 1014 M
- C. 10-7 M
- D. 107 M Discuss
- 3. Molecules in which the atoms are held together by __________ bonds have the strongest chemical linkages.
Options- A. noncovalent
- B. covalent
- C. ionic
- D. hydrogen Discuss
- 4. Weak acids generally have pKa
Options- A. values less than 1
- B. pKa values greater than 2
- C. been seldom found in living systems
- D. that cannot be used to buffer Discuss
- 5. Who discovered and described the blood groups (ABO) classification?
Options- A. Theodor Kocher
- B. Karl Landsteiner
- C. Otto Warburg
- D. Karl Hooper Discuss
- 6. The reason that fats contain more energy than simple sugars, is fats have many more
Options- A. carbon atoms
- B. hydrogen atoms
- C. covalent bonds
- D. hydrogen bonds Discuss
- 7. Buffer solutions
Options- A. will always have a pH of 7
- B. are rarely found in living systems
- C. cause a decrease in pH when acids are added to them.
- D. tend to maintain a relatively constant pH. Discuss
- 8. Which of the following alcohols would be most soluble in water?
Options- A. methanol
- B. ethanol
- C. butanol
- D. octanol Discuss
- 9. H2O and CH4 are both examples of
Options- A. molecules
- B. ions
- C. acids
- D. none of these Discuss
- 10. A solution with pH = 5 is __________ than a solution with pH = 7.
Options- A. 2 times more basic
- B. 10 times more basic
- C. 10 times more acidic
- D. 100 times more acidic Discuss
Water, pH and Macromolecules problems
Search Results
Correct Answer: relative concentration of acids and bases
Correct Answer: 10-14 M
Correct Answer: covalent
Correct Answer: pKa values greater than 2
Correct Answer: Karl Landsteiner
Correct Answer: covalent bonds
Correct Answer: tend to maintain a relatively constant pH.
Correct Answer: methanol
Correct Answer: molecules
Correct Answer: 100 times more acidic
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