Biology Unit 2
Catalyst and enzymes
speed up chemical reactions,. These are not consumed in the reaction
DNA is different from RNA in its function and also in structure
DNA contains deoxyribose and sugar RNA contains ribose
The breakdown of polysaccharide into monosaccharides
is an example of decomposition
oxygen
is found in the gas phrase of matter
Carbon
is ideally suited to form covalent bonds
A hydrogen bond
is not complete by the transfer of its sole electron to another element
A compound consist of
2 or more distinct atoms
A molecule may consist of
2 similar elements chemically bonded
An example of a decomposition reaction
is starch being broken down into sugar in the body
Carbohydrates are
a quick source of energy
Four major divisions of biological organic substances
are carbohydrates, lipids, proteins, and nucleic acids. (polymers)
phospholipids help
cell walls to conserve internal fluids
Carbohydrates do not always
contain protein
All the subatomic particles
do not participate in a chemical reaction
Valence level
electrons are involved in any type of bonding
When = fats decompose in an organism,
energy is released
Organic compounds
form polymers
water
found in animals and human cells is most often found in the liquid phase of matter
Starch is not a
monosaccharide
Most carbohydrates are
monosaccharides
A Decomposition reaction
occurs when ionic or covalent bonds are broken and elements =, ions, or simpler molecules are formed
Covalent bonds
usually hold organic compounds together