Proteins and Enzymes Flashcards
(28 cards)
what is the only species with enough complete data
yeast
approximatly how many protein molecules in a cell
42 million
amino acids are the ……. of proteins
building blocks
describe a proteins structure
complex and 3 dimensional
what does the primary structure describe
the amino acid sequence of a protein
what is the secondary structure
the peptides folding in complex ways
what are the most widely encountered sturcture
alpha helix + beta plated sheet
what is hydrogen bonds relative strength compared to covalent bonds
hydrogen bonds are much weaker than covalent
what are ribonuclease
a combination of alpha helixes and beta sheets
what are electrostatic bonds between
positive and negatively charged groups
momentary asymmetries in charges develop electrostatic forces causing what
stabalisation of tertiary structure
where do disulfide bonds form
between sulfhyrl group of amino acid cystine
what causes denatureation
factors such as heat or acidity alter or breaking forces
what do enzymes do
accelerate metabolic reactions
are enzymes specific or not
yes they are highly, each enzyme only catalyses one reaction
what are metallocoenzymes
metal ions embedded in organic compounds
factors affecting enzyme reactions
substrate concentration, temp, pH, enzyme concentration
what bond joins amino acids
peptide
what is a wan der waals interaction
non-covalent attraction due to movement of ions in atomic orbitals
what charges are between electrostatic bonds
between postive and neutral
what proteins are for defense
antibodies
what proteins are for structure
keratins
what proteins are for catalyic
enzymes
what proteins are for transport
haemoglobin
