Biology Chemistry of Life Test Review
The maximum electron capacity for each energy level is ? ............. ............... ............... ..............
2 8 18 32
The release of energy is
A chemical reaction in the body in which bonds are broken
A compound is
A substance that is composed of two or more distinct atoms
The breakdown of a polysaccharide into monosaccharides is ..........
An example of decomposition
Sugar
Carbohydrate
Protein always contain........
Carbon, Oxygen, Hydrogen, and Nitrogen. occasionally sulphur.
DNA contains
Deoxyribose Sugar
DNA differs from RNA
In function and structure.
What is necessary for reactants to combine chemically?
Input of energy
A decomposition reaction is one in which
Ionic or covalent bonds are broken and elements,ions, or simpler molecules are formed
Organic compounds usually contain ......... atoms.
MANY
These help the membrane to conserve internal fluids.
Phospholids
Organic compounds form...........
Polymers
The function of DNA and RNA
RNA reads and translates the DNA code.
RNA contains
Ribose Sugar
Catalyst and enzymes are known to.....
Speed up a chemical reaction, but not be consumed in the reaction.
A molecule is
Two similar elements chemically bonded
What is an enzyme?
a substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction.
A substance that dissociates with OH- ions classify as
bases
Why can carbon bond to many elements simultaneously?
because it is capable of forming multiple covalent bonds
Genetic codes contain.......
complex functions and punctillious instructions.
Starch being broken down into sugar in the body is what reaction?
decomposition
The subatomic particles/units which govern potential chem reactions among elements
electrons
When fats decompose in an organism what is released?
energy
All subatomic particles participate in chemical reactions?
false only the electrons
Ionic bonds usually hold...........compounds together.
inorganic
The outer energy level electrons are gained and lost in what kind of bonding?
ionic
Cholesterol
lipid
Water found in animal and human cells is most often found in the........phase of matter. Oxygen is found in the...........phase of matter.
liquid gas
DNA
nucleic acid
The atomic number of an atom equals the
number of protons
In any bond the ......... level electrons are involved.
outer
Starch is a monosaccharide or a polysaccharide?
polysaccaride
Antibodies are.........
protein
Certain hormones are.......
protein
Hemoglobin is.......
protein
The four organic molecules found in organisms are........
proteins, nucleic acids, fats and carbohydrates.
Carbohydrates are
quick sources of energy and most are monosaccharides
Which processes are involved in metabolism?
synthesis, growth, repair, decomposition, energy release, reversible reactions, equilibrium, synthesis and decomposition, exchange reactions, control of pH
What happens when salts dissolve in water
the components seperate into ions
Electrons (of a neutral atom) always equal
the number of protons
Carbon ideally suits..........bonds.
to form covalent.
What is starch made up of?
units of C 6 H 12 O 6
How is a hydrogen bond completed?
when the positive end of one molecule is attracted to the negative end of another. The concept is similar to magnetic attraction where opposite poles attract.