Discussion
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- Question
Molecules in which the atoms are held together by __________ bonds have the strongest chemical linkages.
Options- A. noncovalent
- B. covalent
- C. ionic
- D. hydrogen
- Correct Answer
- covalent
- 1. 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
- 2. Who discovered and described the blood groups (ABO) classification?
Options- A. Theodor Kocher
- B. Karl Landsteiner
- C. Otto Warburg
- D. Karl Hooper Discuss
- 3. Hydrogen bonds and hydrophilic interactions are types of
Options- A. weak chemical bonds that hold together the atoms within a molecule
- B. strong chemical bonds that hold together the atoms within a molecule
- C. weak chemical bonds that link together separate molecules
- D. strong chemical bonds that link together separate molecules Discuss
- 4. The lone pair electrons on oxygen in a H20 molecule
Options- 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 Discuss
- 5. Which of the following statements about covalently bonded molecules is false?
Options- A. 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 Discuss
- 6. 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
- 7. 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
- 8. 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 Discuss
- 9. 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
- 10. 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
Water, pH and Macromolecules problems
Search Results
Correct Answer: pKa values greater than 2
Correct Answer: Karl Landsteiner
Correct Answer: weak chemical bonds that link together separate molecules
Correct Answer: carry a partial negative charge
Correct Answer: Such molecules often result from the interaction of ionized atoms
Correct Answer: 10-14 M
Correct Answer: relative concentration of acids and bases
Correct Answer: All of these
Correct Answer: covalent bonds
Correct Answer: tend to maintain a relatively constant pH.
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