3795168
Descripción
Test por erika.roloff, actualizado hace más de 1 año
|
Creado por erika.roloff
hace alrededor de 9 años
|
|
Pregunta 1
Pregunta
all of the following are model organisms except:
Respuesta
-
yeast
-
fruit fly
-
chimpanzee
-
round worm
-
mustard plant
Pregunta 2
Pregunta
which of the following macromolecules are known to have catalytic functions in normal cells?
Respuesta
-
proteins
-
DNA
-
RNA
-
polysaccharides
-
both proteins and RNA
Pregunta 3
Pregunta
DNA strands in the double helix are __________ which means the strand runs in opposite directions
Respuesta
-
base paired
-
antagonists
-
antiparallel
-
parallel
-
twisted
Pregunta 4
Pregunta
which of the following amino acids has a negatively charged side chain with a neutral pH?
Respuesta
-
alanine
-
aspartate
-
glutamine
-
histadine
-
glycine
Pregunta 5
Pregunta
which of the following is the weakest interaction?
Respuesta
-
H bonds
-
ionic bonds
-
phospho-anhydride bonds
-
van der Waals interactions
-
covalent bonds
Pregunta 6
Pregunta
amphipathic refers to molecules that are:
Respuesta
-
hydrophillic
-
hydrophobic
-
non polar at both ends
-
charged at both ends but with opposite charges
-
charged at one end and non polar at the other
Pregunta 7
Pregunta
which of the following is not an activated form of a monomer?
Respuesta
-
adenosine triphosphate
-
glucose-6-phosphate
-
aminoacyl tRNA
-
amino acid
-
uracyl triphosphate
Pregunta 8
Pregunta
the site on an enzyme that will bind to the substrate is called:
Respuesta
-
prosthetic group
-
catalyst
-
active site
-
activation site
-
metastable site
Pregunta 9
Pregunta
an enzyme:
Respuesta
-
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
Pregunta 10
Pregunta
proteins are often composed of 2 or more distinct molecules that fold independently. This represents protein that functions in semi-independent manner
Respuesta
-
protein motifs
-
protein complexes
-
domains
-
beta sheets
-
alpha helices
Pregunta 11
Pregunta
where are hydrophobic interactions most likely to occur?
Respuesta
-
on surface of water soluble protein
-
core of water soluble protein
-
in contact with water molecules
Pregunta 12
Pregunta
___________ and turns connect different peptide segments, allowing polypeptide chains to fold back in on themselves
Respuesta
-
rods
-
loops
-
linkers
-
sheets
-
betas
Pregunta 13
Pregunta
GTPases are different from kinases in that
Respuesta
-
bind to nucleoside triphosphates
-
hydrolyze nucleoside triphosphates
-
are molecular switches
-
are abundant
-
regulate cellular events
Pregunta 14
Pregunta
what kind of interaction is not involved in binding substrate to a normally functioning enzyme?
Respuesta
-
H bonds
-
transient covalent bond
-
ionic bonds
-
permanent covalent bond
-
hydrophobic interactions
Pregunta 15
Pregunta
a small molecule that binds to an active site of an enzyme and disrupts its catalytic function is:
Respuesta
-
allosteric inhibitor
-
competitive inhibitor
-
social inhibitor
-
substrate
-
an activator
Pregunta 16
Pregunta
phosphate group is generally on ________ end of polynucleotide and hydroxyl group of sugar is found on _______ end
Respuesta
-
5', 3'
-
3', 4'
-
3', 5'
-
5, 3
-
5', 4'
Pregunta 17
Pregunta
what gives DNA molecule its negative charge?
Respuesta
-
deoxyribose
-
ribose
-
phosphate groups
-
chlorine ions
-
adenine
Pregunta 18
Pregunta
what explains uniform width of DNA along its length?
Respuesta
-
pyramidine nitrogenous base always pairs with purine nitrogenous base
-
didn't get the rest of the answers
Pregunta 19
Pregunta
condition in which cells have either more or less than normal diploid number of chromosomes is called:
Respuesta
-
polyploidy
-
aneuploidy
-
euploidy
-
dihaploidy
-
diploidy
Pregunta 20
Pregunta
which percent of human genome codes for amino acids in our proteins?
Respuesta
-
15%
-
23%
-
roughly 1.5%
-
roughly 7.5%
-
70%
Pregunta 21
Pregunta
labeled, single stranded DNAs used to localize positions of specific complementary DNA sequences within chromosomes in in situ hybridization are called
Respuesta
-
primers
-
genes
-
probes
-
FISH
-
diploid
Pregunta 22
Pregunta
Histone folds consist of:
Respuesta
-
a dimer of alpha helical bundles
-
3 alpha helices
-
a coiled coil
-
a beta sheet and alpha helix
-
2 beta strands
Pregunta 23
Pregunta
histones have very large relative amounts of which amino acids?
Respuesta
-
histidine and proline
-
glutamate and aspartate
-
lysine and glutamine
-
arginine and lysine
-
arginine and aspartate
Pregunta 24
Pregunta
core particle of nucleosomes consists of ____________ protein complex
Respuesta
-
cytoplasmic
-
octameric
-
diametric
-
zig zag
-
tetrameric
¿Quieres crear tus propios Tests gratis con GoConqr? Más información.