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WorksheetsCh. 2 Basic Chemistry Review
Total questions: 55
Worksheet time: 45mins
The energy located in the bonds of food molecules.
is called thermal energy.
is a form of potential energy.
causes molecular movement.
can be transformed to the bonds of ATP.
Heat is
thermal energy
infrared radiation
kinetic energy
molecular movement
When ever energy is transformed:
the amount of useful energy decreases
some energy is lost as heat
some energy is created
some energy is destroyed
Chewing food
Chemical
Electrical
Mechanical
Radiant
Vision (two types-think!)
Chemical
Electrical
Mechanical
Radiant
Bending your fingers to make a fist
Chemical
Electrical
Mechanical
Radiant
Breaking the bonds of ATP molecules to energize your muscle cells to make that fist
Chemical
Electrical
Mechanical
Radiant
Lying under a sunlamp
Chemical
Electrical
Mechanical
Radiant
The ability of water to maintain a relatively constant temperature and thus prevent sudden changes is because of its high (a) .
Biochemical reactions in the body must occur in (a) .
About (a) % of the volume of a living cell is water.
Water molecules are bonded to other water molecules are bonded to other water molecules because of the presence of (a) bonds.
What is matter?
An atom is made of
a nucleus
protons
neutrons
electrons
All of the above
What are the four most common elements of the human body?
The atomic number of an element is determined by the number of (a) .
Positive electrical charge
neutron
electron
proton
negative electrical charge
neutron
electron
proton
no electrical charge
neutron
electron
proton
When atoms combine, they gain or lose
electrons
neutrons
protons
nuclei
Atoms that have the same atomic numbers but different atomic weights are
catalysts
isotopes
cations
anions
An ion is
an atom that is electrically charged
an atom has gained an electron
an atom that has lost an electron
all of the above
An ionic bond is created by
a positive and a negative ion attracting each other
two or more positive ions combining
two or more negative ions combining
In forming a covalent bond, electrons are
shared by two atoms
given up by two atoms
taken up by an atom
none of the above
Water is formed by molecules of hydrogen and oxygen united by a (a) bond.
A compound is formed when molecules of (a) elements combine.
A double arrow represents a(n) (a) reaction.
An atom or a molecule that affects the rate of a reaction without being consumed by the reaction is called a (a) .
An electrolyte that releases hydrogen ions in water is a(n) (a) .
What is the pH of a neutral solution?
water
organic
inorganic
carbohydrate
organic
inorganic
glucose
organic
inorganic
protein
organic
inorganic
oxygen
organic
inorganic
fats
organic
inorganic
The building materials of a protein are (a) .
Which of the following elements is used to make a functional hemoglobin molecule?
magnesium
iodine
iron
potassium
An atom with 6 protons, 7 neutrons, and 6 electrons shares four pairs of electrons with four other atoms. This atom now is considered to be _____________.
a cation
an anion
a neutral atom
stable
A molecule of methane, CH4, is known specifically as a(n) ________________.
compound
radioisotope
element
atom
The growth of cells and repair of worn-out tissues is accomplished by __________________.
decomposition reactions
catabolic reactions
hydrolysis reactions
synthesis reactions
The reaction sucrose + water yields glucose + fructose is an example of a(n) _____________.
double replacement reaction
synthesis reaction
decomposition reaction
neutralization reaction
Which of these vitamins is produced in skin upon exposure to ultraviolet (UV) radiation?
vitamin A
vitamin C
vitamin D
vitamin E
What are the building blocks of a triglyceride?
Which carbohydrate is also known as blood sugar?
sucrose
glucose
ribose
deoxyribose
The organic compounds that function in building tissues and acting as enzymes are the
nucleic acids
carbohydrates
lipids
proteins
The nucleotide chains of DNA are held together by ______________.
carbon bonds
hydrogen bonds
ionic bonds
nonpolar covalent bonds
Shell 1 of an atom can hold a maximum of (a) electrons.
Trans fats are oils that have solidified by the addition of __________________.
oxygen atoms
carbon atoms
hydrogen atoms
nitrogen atoms
A molecule with the sequence of AUCGUCA should be categorized as ____________________.
RNA
DNA
Inorganic compounds lack carbon and tend to be small, simple molecules.
true
false
A solution with a pH of 3 has 20 times more hydrogen ions than a solutions with a pH of 5.
true
false
Disruption of the hydrogen bonds of functional proteins leads to their denaturation.
true
false
Glycogen is broken down to release glucose subunits.
synthesis reactions
decomposition reactions
exchange reactions
Glucose and fructose are classified as disaccharides.
true
false
