BIO 334 questions thru topic 8

Question 1 of 24

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all of the following are model organisms except:

Select one of the following:

  • yeast

  • fruit fly

  • chimpanzee

  • round worm

  • mustard plant

Question 2 of 24

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

Select one of the following:

  • proteins

  • DNA

  • RNA

  • polysaccharides

  • both proteins and RNA

Question 3 of 24

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

Select one of the following:

  • base paired

  • antagonists

  • antiparallel

  • parallel

  • twisted

Question 4 of 24

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

Select one of the following:

  • alanine

  • aspartate

  • glutamine

  • histadine

  • glycine

Question 5 of 24

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which of the following is the weakest interaction?

Select one of the following:

  • H bonds

  • ionic bonds

  • phospho-anhydride bonds

  • van der Waals interactions

  • covalent bonds

Question 6 of 24

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amphipathic refers to molecules that are:

Select one of the following:

  • 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 of 24

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

Select one of the following:

  • adenosine triphosphate

  • glucose-6-phosphate

  • aminoacyl tRNA

  • amino acid

  • uracyl triphosphate

Question 8 of 24

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

Select one of the following:

  • prosthetic group

  • catalyst

  • active site

  • activation site

  • metastable site

Question 9 of 24

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an enzyme:

Select one of the following:

  • 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 of 24

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

Select one of the following:

  • protein motifs

  • protein complexes

  • domains

  • beta sheets

  • alpha helices

Question 11 of 24

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where are hydrophobic interactions most likely to occur?

Select one of the following:

  • on surface of water soluble protein

  • core of water soluble protein

  • in contact with water molecules

Question 12 of 24

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

Select one of the following:

  • rods

  • loops

  • linkers

  • sheets

  • betas

Question 13 of 24

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GTPases are different from kinases in that

Select one of the following:

  • bind to nucleoside triphosphates

  • hydrolyze nucleoside triphosphates

  • are molecular switches

  • are abundant

  • regulate cellular events

Question 14 of 24

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

Select one of the following:

  • H bonds

  • transient covalent bond

  • ionic bonds

  • permanent covalent bond

  • hydrophobic interactions

Question 15 of 24

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

Select one of the following:

  • allosteric inhibitor

  • competitive inhibitor

  • social inhibitor

  • substrate

  • an activator

Question 16 of 24

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

Select one of the following:

  • 5', 3'

  • 3', 4'

  • 3', 5'

  • 5, 3

  • 5', 4'

Question 17 of 24

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what gives DNA molecule its negative charge?

Select one of the following:

  • deoxyribose

  • ribose

  • phosphate groups

  • chlorine ions

  • adenine

Question 18 of 24

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what explains uniform width of DNA along its length?

Select one of the following:

  • pyramidine nitrogenous base always pairs with purine nitrogenous base

  • didn't get the rest of the answers

Question 19 of 24

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

Select one of the following:

  • polyploidy

  • aneuploidy

  • euploidy

  • dihaploidy

  • diploidy

Question 20 of 24

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

Select one of the following:

  • 15%

  • 23%

  • roughly 1.5%

  • roughly 7.5%

  • 70%

Question 21 of 24

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

Select one of the following:

  • primers

  • genes

  • probes

  • FISH

  • diploid

Question 22 of 24

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Histone folds consist of:

Select one of the following:

  • a dimer of alpha helical bundles

  • 3 alpha helices

  • a coiled coil

  • a beta sheet and alpha helix

  • 2 beta strands

Question 23 of 24

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histones have very large relative amounts of which amino acids?

Select one of the following:

  • histidine and proline

  • glutamate and aspartate

  • lysine and glutamine

  • arginine and lysine

  • arginine and aspartate

Question 24 of 24

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core particle of nucleosomes consists of ____________ protein complex

Select one of the following:

  • cytoplasmic

  • octameric

  • diametric

  • zig zag

  • tetrameric

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BIO 334 questions thru topic 8

erika.roloff
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