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Chapter 2

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  • Which subatomic particles are found in the nucleus of a atom?

    Electrons and ions

    Electrons and neutrons

    Protons and neutrons

    Protons and electrons

    Protons and neutrons

  • The number of protons in an atom is known as the atom's __________.

    atomic number

    atomic weight

    mass number

    nuclear number

    Atomic number

  • Atoms that are of the same element but contain different numbers of neutrons are called

    isotopes.

    cations.

    anions.

    isomers.

    None of these are correct.

    Isotopes

  • Ions with a negative charge are called

    cations.

    radicals.

    polyatomic ions.

    anions.

    None of these are correct.

    Anions

  • Which type of reaction is depicted here?

    Ab --> a + b

    Synthesis

    Reversible

    Exchange

    Decomposition

    Decomposition

  • The energy of motion is called what?

    hydrolysis

    kinetic energy

    anabolism

    potential energy

    Kinetic Energy

  • Chemical reactions that release energy are categorized as ________.

    hydrolytic

    exergonic

    anabolic

    endergonic

    catabolic

    Exergonic

  • Which of the following molecules are considered inorganic?

    Proteins

    DNA

    Water

    Lipids

    Water (because it does not have carbon atoms)

  • The most acidic solution would have a pH of ________.

    14

    10

    7

    4

    0

    0

  • Which of the following is an example of a disaccharide?

    fructose

    glycogen

    cellulose

    starch

    sucrose

    Sucrose (It has two monosaccharides)

  • Which of the following is connected by peptide bonds and function as a building block for proteins?

    polypeptides

    peptides

    lipids

    amino acids

    Amino Acids

  • what type of molecule is dna

    Carbohydrate

    Lipid

    Nucleic acid

    Protein

    Nucleic acid

  • The hydrolysis of ATP yields the molecule ________.

    thymine

    ribose

    adenine

    phospholipid

    adenosine diphosphate

    Adenosine diphosphate

  • In the second level of organization, different molecules interact to form larger structures with specific functions. After the chemical level, what is the next or second level of organization?

    organ level

    tissue level

    organ system level

    cellular level

    cellular level

  • What kind of covalent bond is formed when the electrons are NOT shared equally between the bonding atoms, for example, when hydrogen and oxygen atoms bond in a water molecule?

    ionic

    polar

    double

    hydrogen

    Polar

  • Generally it is accepted that some kinds of fatty acids are healthier than others. What fatty acid found in fish is associated with reduced risks for heart disease and other inflammatory diseases?

    trans fatty acids

    polyunsaturated fatty acids

    saturated fatty acids

    omega-3 fatty acids

    Omega - 3 fatty acids

  • What makes a saturated fatty acid different from an unsaturated fatty acid?

    Unsaturated fatty acids have single covalent bonds between carbon atoms.

    The carbon atoms in saturated fatty acids have four single covalent bonds and therefore have only single covalent bonds between carbon atoms.

    The carbon atoms in saturated fatty acids have four single covalent bonds and therefore have only single covalent bonds between carbon atoms.