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26 notecards = 7 pages (4 cards per page)

Viewing:

Chemistry Comes Alive

front 1

All of the following are states of matter except ______.
a. energy
b. liquid
c. gas
d. solid

back 1

a. energy

front 2

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

a. matter
b. compounds
c. elements
d. protons

back 2

c. elements

front 3

Energy in action is defined as ________ energy.

a. chemical
b. kinetic
c. potential
d. ATP

back 3

b. kinetic

front 4

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

a. Chemical
b. Potential
c. Mechanical
d. Electrical

back 4

c. Mechanical

front 5

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

a. heat
b. water
c. mechanical energy
d. electrons

back 5

a. heat

front 6

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

a. Hydrogen
b. Calcium
c. Nitrogen
d. Oxygen

back 6

b. Calcium

front 7

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

a. protons
b. electrons
c. neutrons
d. protons and neutrons

back 7

a. protons

front 8

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

a. protons; electrons
b. protons; neutrons
c. electrons; neutrons
d. neutrons; protons

back 8

b. protons; neutrons

front 9

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

a. positive
b. negative
c. neutral
d. It varies from atom to atom

back 9

b. negative

front 10

Which spontaneously decompose into more stable atoms?

a. Radioisotopes
b. Elements
c. Isotopes
d. Colloids

back 10

a. Radioisotopes

front 11

Which of the following is not a compound?

a. H2O
b. NaCl
c. O2
d. C6H12O6

back 11

c. O2

front 12

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

a. 2
b. 2, 8
c. 2, 8, 7
d. 2, 8, 8

back 12

c. 2, 8, 7

front 13

An ionic bond is formed between _______.

a. two inert atoms
b. two cations
c. two anions
d. a cation and an anion

back 13

d. a cation and an anion

front 14

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

a. Polar covalent
b. Nonpolar covalent
c. Ionic
d. Hydrogen

back 14

a. Polar covalent

front 15

Which of the following statements is true of solvents?

a. They are usually solids.
b. They are present in smaller amounts in a
solution.
c. Water is the main solvent in the body.
d. They are tiny particles.

back 15

c. Water is the main solvent in the body.

front 16

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

a. Synthesis
b. Exchange
c. Decomposition
d. Catabolic

back 16

a. Synthesis

front 17

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

a. temperature
b. the concentration of reactants
c. particle size
d. density

back 17

d. density

front 18

Bonds are broken during which type of reaction?

a. Catabolic
b. Anabolic
c. Synthesis
d. Endergonic

back 18

a. Catabolic

front 19

An enzyme is an example of a _________.

a. reactant
b. solute
c. catalyst
d. reaction

back 19

c. catalyst

front 20

Which of the following is not a reason for the irreversibility of chemical reactions in cells?

a. Chemical reactions that release energy would
require energy to be reversed.
b. A product might be continually removed from the
reaction site.
c. Biological reactions can only proceed in a
single direction.
d. A product might be expelled from the body.

back 20

c. Biological reactions can only proceed in a
single direction.

front 21

A steroid is an example of _________.

a. an inorganic compound
b. a lipid
c. a protein
d. a sugar

back 21

b. a lipid

front 22

Which of the following is not a function of water?

a. Body temperature regulation
b. Source of electrolytes
c. Universal solvent
d. Protection from mechanical damage

back 22

b. Source of electrolytes

front 23

Which pH indicates a weak base?

a. 2.0
b. 6.8
c. 7.4
d. 11.0

back 23

c. 7.4

front 24

Which of the following describes the tertiary structure of proteins?

a. Twisting and bending to form a more complex
structure such as a helix
b. Two or more polypeptide chains aggregated to
form a complex protein
c. The linear sequence of amino acids
d. α-helical or β-pleated regions of the
polypeptide chain folded upon one another

back 24

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

front 25

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

a. an acid
b. a base
c. a salt
d. an electrolyte

back 25

b. a base

front 26

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

a. Glucose
b. Fat
c. Protein
d. ATP

back 26

d. ATP