The Molecules Of Cells Flashcards
Hydrophilic
Water loving
Hydrophobic
Water hating
Acids
Substances that release hydrogen ions
Contain more H+ than OH-
Bases
Substances that either take up hydrogen or release OH
pH scale
Ranges from 0-14
14 being most basic and 0 being the most acidic
Buffer
Maintains the pH of a substance
Organic molecules
Always contain carbon and hydrogen
Monomer
Simple organic molecule
Polymer
Serval monomers put together
Dehydration synthesis
Water is taken out
Hydrolysis reaction
Water is added
Carbohydrates
Function for quick fuel and short term energy storage
Monosaccharide
Simple sugar. Can’t be broken down
Disaccharide
Two monosaccharides joined together
Polysaccharides
Long polymers such as starch, glycogen, and cellulose
Starch and glycogen
Large storage forms of glucose found In animals and plants
Cellulose
Known as fiber, we can’t digest it
Lipids
Consists of fats, oils, and steroids
Can not dissolve in water
Function of fats
Long term energy storage
Insulated against heat loss
Forms protective cushion around major organs
Triglyceride
Fancy name for fat
Made up of three parts
Fatty acid
Hydrocarbon chain that ends with the acidic group COOH
Saturated fatty acids
NO double bonds
Unsaturated fatty acids
Have double bonds between carbons
Phospholipids
Contain phosphate group
Head is polar, body is non-polar
Can breakdown in water
Steroids
Four fused carbon rings
Proteins
Polymers composed of amino acid monomers
Enzymes
Speed chemical reactions
PolyPeptide
Chain of amino acids that are joined to one another by peptide bonds
Primary structure
The level of structure is determined by the sequence of amino acids that join to form a polypeptide
Secondary structure
Hydrogen bonding between amino acids cause the polypeptide to form an alpha helix or beta sheet
Tertiary structure
Covalent bonding cause the polypeptide to fold and twist
Quaternary stricture
Occurs when two or more polypeptides join to form a single protein
Denatured
When proteins go under extreme heat or pH change they undergo irreversible change In shape