all of the following are model organisms except:
which of the following macromolecules are known to have catalytic functions in normal cells?
both proteins and RNA
DNA strands in the double helix are __________ which means the strand runs in opposite directions
which of the following amino acids has a negatively charged side chain with a neutral pH?
which of the following is the weakest interaction?
van der Waals interactions
amphipathic refers to molecules that are:
non polar at both ends
charged at both ends but with opposite charges
charged at one end and non polar at the other
which of the following is not an activated form of a monomer?
the site on an enzyme that will bind to the substrate is called:
binds substrates in a manner that facilitates formation of a product
decreases rate of reaction
changes position of equilibrium in reaction
doesn't change rate at which equilibrium is achieved
is always a protein
proteins are often composed of 2 or more distinct molecules that fold independently. This represents protein that functions in semi-independent manner
where are hydrophobic interactions most likely to occur?
on surface of water soluble protein
core of water soluble protein
in contact with water molecules
___________ and turns connect different peptide segments, allowing polypeptide chains to fold back in on themselves
GTPases are different from kinases in that
bind to nucleoside triphosphates
hydrolyze nucleoside triphosphates
are molecular switches
regulate cellular events
what kind of interaction is not involved in binding substrate to a normally functioning enzyme?
transient covalent bond
permanent covalent bond
a small molecule that binds to an active site of an enzyme and disrupts its catalytic function is:
phosphate group is generally on ________ end of polynucleotide and hydroxyl group of sugar is found on _______ end
what gives DNA molecule its negative charge?
what explains uniform width of DNA along its length?
pyramidine nitrogenous base always pairs with purine nitrogenous base
didn't get the rest of the answers
condition in which cells have either more or less than normal diploid number of chromosomes is called:
which percent of human genome codes for amino acids in our proteins?
labeled, single stranded DNAs used to localize positions of specific complementary DNA sequences within chromosomes in in situ hybridization are called
Histone folds consist of:
a dimer of alpha helical bundles
3 alpha helices
a coiled coil
a beta sheet and alpha helix
2 beta strands
histones have very large relative amounts of which amino acids?
histidine and proline
glutamate and aspartate
lysine and glutamine
arginine and lysine
arginine and aspartate
core particle of nucleosomes consists of ____________ protein complex