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