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| 1 | |
A/an _____ is the smallest unit of an element that still retains the chemical and physical properties of that element. |
| | A) | molecule |
| | B) | atom |
| | C) | compound |
| | D) | emulsion |
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| 2 | |
The sum of the number of neutrons and protons in the nucleus of an atom is known as the ______. |
| | A) | elemental number |
| | B) | atomic number |
| | C) | mass number |
| | D) | None of the above. |
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| 3 | |
_________________ bonds involve a sharing of electrons. |
| | A) | Ionic |
| | B) | Molecular |
| | C) | Covalent |
| | D) | Hydrogen |
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| 4 | |
_________________ prevent a change in pH. |
| | A) | Acids |
| | B) | Bases |
| | C) | Salts |
| | D) | Buffers |
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| 5 | |
A typical fat molecule consists of ______. |
| | A) | glycerol |
| | B) | fatty acids |
| | C) | glycogen |
| | D) | glycerol and fatty acids |
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| 6 | |
Four elements that are the basic building blocks to life on Earth include: |
| | A) | carbon, potassium, sodium, calcium |
| | B) | oxygen, silicon, carbon, nitrogen |
| | C) | carbon, hydrogen, oxygen, nitrogen |
| | D) | nitrogen, oxygen, magnesium, carbon |
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| 7 | |
Particles that carry either a positive(+) or negative(-) charge are called: |
| | A) | ions |
| | B) | isotopes |
| | C) | cations |
| | D) | isomers |
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| 8 | |
Water is considered a ____ molecule. |
| | A) | non-polar |
| | B) | ionic |
| | C) | polar |
| | D) | hydroxyl |
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| 9 | |
The lower the pH, |
| | A) | the greater the hydrogen ion concentration. |
| | B) | the more basic the solution. |
| | C) | the lesser the hydrogen ion concentration. |
| | D) | All of the choices are correct. |
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| 10 | |
The four categories of organic molecules include: |
| | A) | water, lipids, proteins, nucleic acids |
| | B) | carbohydrates, proteins, lipids, nucleic acids |
| | C) | carbohydrates, water proteins, lipids |
| | D) | None of the above. |
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| 11 | |
Which of the following is an organic molecule? |
| | A) | CaCO3 |
| | B) | H2SO4 |
| | C) | C6H12O6 |
| | D) | NaOH |
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| 12 | |
Joining small molecules (monomers) together to form longer chains (polymers) requires a process called: |
| | A) | hydrolysis |
| | B) | dehydration reaction |
| | C) | ionization |
| | D) | emulsification |
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| 13 | |
A diet high in saturated fats is associated with: |
| | A) | Jaundice |
| | B) | Atherosclerosis |
| | C) | Arthritis |
| | D) | Cystic fibrosis |
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| 14 | |
The process of breaking lipids into smaller molecules is called |
| | A) | denaturation. |
| | B) | ionization. |
| | C) | polymerization. |
| | D) | emulsification. |
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| 15 | |
In the RNA molecule, adenine is always joined to: |
| | A) | cytosine |
| | B) | adenine |
| | C) | thymine |
| | D) | uracil |
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| 16 | |
Which of the following molecules serves as the energy "currency" of cells? |
| | A) | RNA |
| | B) | Carbonyls |
| | C) | ATP |
| | D) | Enzymes |
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| 17 | |
The subunits of proteins are known as ______. |
| | A) | amines |
| | B) | peptides |
| | C) | polypeptides |
| | D) | amino acids |
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| 18 | |
The covalent bond that joins two amino acids in a protein is called a(n) _____. |
| | A) | hydrogen bond |
| | B) | peptide bond |
| | C) | carbohydrate bond |
| | D) | alpha linkage bond |
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| 19 | |
Each nucleotide contains a ______. |
| | A) | phosphate group |
| | B) | sugar |
| | C) | nitrogenous base |
| | D) | All of these are correct. |
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| 20 | |
Which of the following is not a pest management strategy that would decrease reliance on pesticides? |
| | A) | usage of natural enemies |
| | B) | disruption of pest reproduction |
| | C) | plant the same crop species repeatedly |
| | D) | plant pest resistant crops |
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