Matter and Energy ​
Atoms​
Molecules
Chemical Reactions​
Biochemistry​
100

All of the following are states of matter except ______.

  1. energy

  2. liquid

  3. gas

  4. solid

1. energy

100

Which of the following is not one of the four major elements in the human body?

  1. Hydrogen

  2. Calcium

  3. Nitrogen

  4. Oxygen

2. Calcium

100

Which of the following is not a compound?

  1. H2O

  2. NaCl

  3. O2

  4. C6H12O6

3. O2

100

Building muscle tissue is an example of which type of reaction?

  1. Synthesis

  2. Exchange

  3. Decomposition

  4. Catabolic

1. Synthesis

100

A steroid is an example of _________.

  1. an inorganic compound

  2. a lipid

  3. a protein

  4. a sugar

2. a lipid

200

Substances that cannot be broken down into simpler substances are defined as ________.

  1. matter

  2. compounds

  3. elements

  4. protons

3. elements

200

The atomic number is always equal to the number of _______ in an atom.

  1. protons

  2. electrons

  3. neutrons

  4. protons and neutrons

1. Protons

200

The following are electrons in the electron shells of four atoms. Which atom would most likely be reactive?

  1. 2

  2. 2, 8

  3. 2, 8, 7

  4. 2, 8, 8

3. 2, 8, 7

200

All of the following affect the rate of a reaction except __________.

  1. temperature

  2. the concentration of reactants

  3. particle size

  4. density

4. density

200

Which of the following is not a function of water?


  1. Body temperature regulation

  2. Source of electrolytes

  3. Universal solvent

  4. Protection from mechanical damage

2. Source of electrolytes

300

Energy in action is defined as _______ energy.

  1. chemical

  2. kinetic

  3. potential

  4. ATP

2. kinetic

300

Isotopes have the same number of _______ but differ in the number of ________.

  1. protons; electrons

  2. protons; neutrons

  3. electrons; neutrons

  4. neutrons; protons

2. protons; neutrons

3. electrons; neutrons

300

An ionic bond is formed between _______.

  1. two inert atoms

  2. two cations

  3. two anions

  4. a cation and an anion

4. a cation and an anion

300

Bonds are broken during which type of reaction?

  1. Catabolic

  2. Anabolic

  3. Synthesis

  4. Endergonic

  1. Catabolic

300

Which pH indicates a weak base?

  1. 2.0

  2. 6.8

  3. 7.4

  4. 11.0

3. 7.4

400

When you row a boat, your arms provide which type of energy?

  1. Chemical

  2. Potential

  3. Mechanical

  4. Electrical

3. Mechanical

400

If an atom gains an electron, the resulting charge of that atom is more _________.

  1. positive

  2. negative

  3. neutral

  4. It varies from atom to atom.

2. negative

400

Which type of bond is formed when electrons are shared unequally between atoms?

  1. Polar covalent

  2. Nonpolar covalent

  3. Ionic

  4. Hydrogen

  1. Polar covalent

400

An enzyme is an example of a _________.

  1. reactant

  2. solute

  3. catalyst

  4. reaction

3. catalyst

400

Which of the following describes the tertiary structure of proteins?


  1. Twisting and bending to form a more complex structure such as a helix

  2. Two or more polypeptide chains aggregated to form a complex protein

  3. The linear sequence of amino acids

    4. α-helical or β-pleated regions of the polypeptide chain folded upon one             another

4. α-helical or β-pleated regions of the polypeptide chain folded upon one             another

500

When energy is converted from one form to another, some of the original energy is "lost" as ________.

  1. heat

  2. water

  3. mechanical energy

  4. electrons

1. Heat

500

Which spontaneously decompose into more stable atoms?

  1. Radioisotopes

  2. Elements

  3. Isotopes

  4. Colloids

  1. Radioisotopes

500

Which of the following statements is true of solvents?

  1. They are usually solids.

  2. They are present in smaller amounts in a solution.

  3. Water is the main solvent in the body.

  4. They are tiny particles.

3. Water is the main solvent in the body.

500

Which substance is the primary energy-transferring molecule in the cell?


  1. Glucose

  2. Fat

  3. Protein

  4. ATP 

4. ATP

500

A substance that dissociates into cations and hydroxyl ions is __________.


  1. an acid

  2. a base

  3. a salt

  4. an electrolyte

2. a base

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