binds substrates in a manner that facilitates formation of a product

changes position of equilibrium in reaction

doesn't change rate at which equilibrium is achieved

Changing the way you learn

Question 1

Question

all of the following are model organisms except:

Answer

yeast
fruit fly
chimpanzee
round worm
mustard plant

Question 2

Question

which of the following macromolecules are known to have catalytic functions in normal cells?

Answer

proteins
DNA
RNA
polysaccharides
both proteins and RNA

Question 3

Question

DNA strands in the double helix are __________ which means the strand runs in opposite directions

Answer

base paired
antagonists
antiparallel
parallel
twisted

Question 4

Question

which of the following amino acids has a negatively charged side chain with a neutral pH?

Answer

alanine
aspartate
glutamine
histadine
glycine

Question 5

Question

which of the following is the weakest interaction?

Answer

H bonds
ionic bonds
phospho-anhydride bonds
van der Waals interactions
covalent bonds

Question 6

Question

amphipathic refers to molecules that are:

Answer

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

Question 7

Question

which of the following is not an activated form of a monomer?

Answer

adenosine triphosphate
glucose-6-phosphate
aminoacyl tRNA
amino acid
uracyl triphosphate

Question 8

Question

the site on an enzyme that will bind to the substrate is called:

Answer

prosthetic group
catalyst
active site
activation site
metastable site

Question 9

Question

an enzyme:

Answer

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

Question 10

Question

proteins are often composed of 2 or more distinct molecules that fold independently. This represents protein that functions in semi-independent manner

Answer

protein motifs
protein complexes
domains
beta sheets
alpha helices

Question 11

Question

where are hydrophobic interactions most likely to occur?

Answer

on surface of water soluble protein
core of water soluble protein
in contact with water molecules

Question 12

Question

___________ and turns connect different peptide segments, allowing polypeptide chains to fold back in on themselves

Answer

rods
loops
linkers
sheets
betas

Question 13

Question

GTPases are different from kinases in that

Answer

bind to nucleoside triphosphates
hydrolyze nucleoside triphosphates
are molecular switches
are abundant
regulate cellular events

Question 14

Question

what kind of interaction is not involved in binding substrate to a normally functioning enzyme?

Answer

H bonds
transient covalent bond
ionic bonds
permanent covalent bond
hydrophobic interactions

Question 15

Question

a small molecule that binds to an active site of an enzyme and disrupts its catalytic function is:

Answer

allosteric inhibitor
competitive inhibitor
social inhibitor
substrate
an activator

Question 16

Question

phosphate group is generally on ________ end of polynucleotide and hydroxyl group of sugar is found on _______ end

Answer

5', 3'
3', 4'
3', 5'
5, 3
5', 4'

Question 17

Question

what gives DNA molecule its negative charge?

Answer

deoxyribose
ribose
phosphate groups
chlorine ions
adenine

Question 18

Question

what explains uniform width of DNA along its length?

Answer

pyramidine nitrogenous base always pairs with purine nitrogenous base
didn't get the rest of the answers

Question 19

Question

condition in which cells have either more or less than normal diploid number of chromosomes is called:

Answer

polyploidy
aneuploidy
euploidy
dihaploidy
diploidy

Question 20

Question

which percent of human genome codes for amino acids in our proteins?

Answer

15%
23%
roughly 1.5%
roughly 7.5%
70%

Question 21

Question

labeled, single stranded DNAs used to localize positions of specific complementary DNA sequences within chromosomes in in situ hybridization are called

Answer

primers
genes
probes
FISH
diploid

Question 22

Question

Histone folds consist of:

Answer

a dimer of alpha helical bundles
3 alpha helices
a coiled coil
a beta sheet and alpha helix
2 beta strands

Question 23

Question

histones have very large relative amounts of which amino acids?

Answer

histidine and proline
glutamate and aspartate
lysine and glutamine
arginine and lysine
arginine and aspartate

Question 24

Question

core particle of nucleosomes consists of ____________ protein complex

Answer

cytoplasmic
octameric
diametric
zig zag
tetrameric

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BIO 334 questions thru topic 8

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Question 11

Question 12

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Question 15

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Question 20

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Question 23

Question 24

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	Created by erika.roloff about 9 years ago