Ch. 2 Flashcards
Monomer
Single subunit
Polymer
Many subunits
Dehydration synthesis
Formation of large molecules by the removal of water
Hydrolysis
Breakdown of large molecules by the addition of water
Carbohydrates: subunits
Monosaccharide
Disaccharide
Polysaccharide
Carbohydrate: function
Sugar transport, energy storage, structural support
Carbohydrate: bond type
Covalent bonds
Nucleic Acids: types
DNA
RNA
ATP
Nucleic Acids: function
specialized for the storage, transmission and use of genetic information
Nucleic Acids: subunit
nucleotide
Nucleic Acid: structure
nitrogenous base
phosphate group
sugar molecule
Nitrogenous Bases
Purines: adenine, Guanine
pyrimidines: Thymine, Cytosine and Uracil
DNA uses what sugar?
Deoxyribose
RNA uses what suagr?
Ribose
Polymerization
when monomers chemically combine to create larger molecules or polymers
Nucleic Acids: type of bonds
phosphodiester bond between phosphate group and sugar molecule of different monomers
hydrogen bonding between nitrogenous bases of different monomers
DNA: function
holding of genetic information in nucleotide sequence
RNA: function
direct synthesis of proteins
nitrogenous base bonds
Adenine with Thymine
DNA: Guanine with Cytosine
RNA Guanine with Uracil
ATP: function
primary energy currency of the cell
Protein: Functions
enzyme catalysts
defense
transport
support
motion
regulation
storage
Protein: subunits
amino acids
peptide
polypeptide
Protein: structures
primary structure: amino acids
secondary: alpha helixes and beta sheets
tertiary: polypeptide chains
quaternary: two or more smaller protein chains
Amino Acid: Structure
carbon atom surrounded by
amino group
carboxyl group
single hydrogen
variable R group
The ____ of a protein determines its ______
shape, function
Denaturation
change in the shape of a protein, usually causing loss of function, caused by changes in:
pH, temperature, salt concentration
Lipids: types
triglycerides
phospholipids
triglycerides
1 glycerol and 3 fatty acids
phospholipids can be
saturated, unsaturated or polyunsaturated
saturated
maximum number of hydrogen bonds
unsaturated
some hydrogens have double bonds
not maximum number of bonds
Lipids: Function
phospholipids: cell membranes
triglycerides: energy storage, twice as much as carbohydrates
phospholipids structure
polar heads hydrophilic
nonpolar tails hydrophobic