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| 1 | |
An atom of carbon has 6 protons and 6 neutrons. What is the atomic weight of carbon? |
| | A) | 6 |
| | B) | 9 |
| | C) | 12 |
| | D) | 18 |
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| 2 | |
An atom of nitrogen has 7 protons and 7 neutrons. What is the atomic number of nitrogen? |
| | A) | 7 |
| | B) | 14 |
| | C) | 21 |
| | D) | 70 |
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| 3 | |
Different isotopes of a particular element have different numbers of _________. |
| | A) | protons |
| | B) | electrons |
| | C) | neutrons |
| | D) | ions |
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| 4 | |
Whereas, covalent bonds result from ________, ionic bonds result from _________. |
| | A) | isotope formation, ionization |
| | B) | the sharing of electrons, the attraction between opposite charges |
| | C) | positive charges, negative charges |
| | D) | inorganic attractions, organic attractions |
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| 5 | |
Which of the following does not describe a water molecule? |
| | A) | Covalently bonded |
| | B) | A compound |
| | C) | Inorganic |
| | D) | None of the above |
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| 6 | |
Which of the following would result from the hydrolysis of a disaccharide? |
| | A) | A polysaccharide |
| | B) | Two amino acids |
| | C) | Two monosaccharides |
| | D) | A CO2 molecule |
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| 7 | |
Which of the following molecules has energy in a form that can be readily used by cells? |
| | A) | Glucose |
| | B) | Deoxyribonucleic acid |
| | C) | Ribonucleic acid |
| | D) | Adenosine triphosphate |
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| 8 | |
A person with a blood pH below 7.35 has alkalosis. |
| | A) | True |
| | B) | False |
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| 9 | |
Bases have pH values above 7. |
| | A) | True |
| | B) | False |
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| 10 | |
A base is a chemical that can function to maintain a constant pH in a solution. |
| | A) | True |
| | B) | False |
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| 11 | |
One structure of a polypeptide is often a helix, held in place by hydrogen bonding. |
| | A) | True |
| | B) | False |
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| 12 | |
Acids are molecules that release hydrogen ions in water. |
| | A) | True |
| | B) | False |
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| 13 | |
A radioactive isotope which is intentionally put into a human body for the purpose of watching it within the person and then metabolic functions is called a(n) ________ . |
| | A) | Isotope |
| | B) | Geiger |
| | C) | Tracer |
| | D) | Neutrons |
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| 14 | |
Atoms can bond with each other to form a chemical "unit" called a _____________. |
| | A) | molecule |
| | B) | electrons |
| | C) | attraction |
| | D) | inorganic matter |
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| 15 | |
Atoms with more than one energy shell or energy level are most stable when which shell has how many electrons? |
| | A) | innermost; 6 |
| | B) | outermost; 8 |
| | C) | innermost; 8 |
| | D) | outermost; 2 |
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| 16 | |
What do we call particles which are positively or negatively charged? |
| | A) | reactions |
| | B) | ions |
| | C) | compound |
| | D) | molecule |
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| 17 | |
Does the molecule formula CO2 indicate single, double, triple, or ring bonds? |
| | A) | single |
| | B) | double |
| | C) | triple |
| | D) | ring |
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