test chemistry of life
An enzyme is:
a biological catalyst
Starch being broken down into sugar in the body is a
decomposition reaction
Phospholipids help the cell membrane to conserve internal fluids.
Phospholipids
DNA is different from RNA in its function and also in its structure. DNA contains deoxyribose sugar and RNA contains ribose sugar.
DNA deoxyribose RNA ribose
Why can carbon bond to many elements simultaneously?
because it is capable of forming multiple covalent bonds
A hydrogen bond is completed by the transfer of its sole electron to another element.
false
All the subatomic particles participate in chemical reactions.
false
The four organic molecules found in organisms are carbohydrates, proteins, nucleic acids, and amino acids.
false
Ionic bonds usually hold
inorganic compounds together
Which statements are correct relative to carbohydrates?
quick source of energy, most are monosaccharides
Organic compounds form polymers.
true
Organic compounds usually contain many atoms.
true
When fats decompose in an organism, energy is released.
true
Check the correct statement regarding a compound and a molecule:
A compound consists of two or more distinct atoms, a molecule may consists of two similar elements chemically bonded
The decomposition reaction is:
AB>A+B
Which processes are involved in metabolism?
all of the above
When a substance dissociates into OH-ions, they are classified as bases
bases
sugar
carbohydrate
Genetic codes contain:
complex information, detailed instructions
32 18 8 2
electron capacity
Which statement is correct?
electrons of a neutral atom always equal the number of protons
Starch is a monosaccharide.
false
What is necessary for reactants to combine chemically?
input of energy
DNA
nucleic acid
hemoglobin
protein
Catalysts and enzymes are known to speed up a chemical reaction, but not be consumed in the reaction.
speed up
When salts are dissolved in water:
the components separate into ions
Carbon is ideally suited to form covalent bonds.
true
Starch is made up of:
units of C6 H12 O6
Carbohydrates always contain protein.
false
cholesterol
lipid
a chemical reaction in your body in which bonds are broken is associated with:
the release of energy
An atom that has 12 protons and its nucleus has an atomic number of:
12
Which statements correctly relates to DNA and RNA?
RNA reads and translates the DNA code
The breakdown of a polysaccharide into monosaccharides is an example of
decomposition
A decomposition reaction occurs when ionic or covalent bonds are broken and elements, ions, or simpler molecules are formed.
decomposition reaction
The subatomic particles/units which govern potential chemical reactions among elements are:
electrons
Water found in animal and human cells is most often found in the liquid phase of matter, and oxygen is found in the gas phase of matter.
liquid, gas
In bonding of any type, the outer level electrons are involved.
outer
In that the process of ionic bonding:
outer energy level electrons are gained and lost
antibodies, certain hormones, and hemoglobin are all:
proteins
