BIO 334 questions thru topic 8

erika.roloff
Quiz by erika.roloff, updated more than 1 year ago
erika.roloff
Created by erika.roloff over 5 years ago
17
1

Description

clicker questions thru topic 6

Resource summary

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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