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BIO 255 Test 1-Questions and Answers 100% Solved
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BIO 255 Test 1-Questions and Answers 100% Solved
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BIO 255 Test 1-Questions and Answers 100% SolvedCytosol Correct Ans-criss-crossed by long fine filaments (cytoskeleton)
actin: thinnest
Microtubules: thickest
Motor proteins: use ATP to move organelles + proteins across cytoskeleton tubules
protozoans Correct Ans-class of free living, motile, unicellular organisms
popular model organisms Correct Ans-Brewer's yeast (eukaryote)
viruses: lambda phage, HIV
bacteria: E. Coli, B. Substillis
eukaryotes: S. Cerevisiae, S. Pombe
, BIO 255 Test 1-Questions and Answers 100% Solved
able to grow in lab
short generation time
unique feature appropriate to research
community
genome sequenced
other clear scientific advantage
organoids Correct Ans-human embryo cells self-assemble into organ like structures
hydrophobic force Correct Ans-generated by pushing of nonpolar surfaces out of
hydrogen-bonded water network
4 families of organic molecules Correct Ans-sugars
fatty acids
nucleotides
, BIO 255 Test 1-Questions and Answers 100% Solved
amino acids
isomers Correct Ans-have same formula but different structure
optical isomers: mirror image pair of isomers
condensation reaction (dehydration reaction) Correct Ans-molecule of water is expelled as
bond is formed
hydrolysis Correct Ans-water molecule is consumed to form a bond
fatty acid Correct Ans-long hydrophobic chain and carboxyl group which behaves as an
acid and is ionized, hydrophobic, and reactive in aqueous solutions
, BIO 255 Test 1-Questions and Answers 100% Solved
amino acids Correct Ans-all possess carboxylic acid group, amino group, and side R
chained attached to central carbon atom
amino group at N terminus
carboxyl group at C terminus
D- and L- forms of each amino acid exist, but only L-forms are found in protein; only L
Enantiomers contribute to proteins on earth
nucleoside Correct Ans-a base + it's sugar without any phosphate group attached
cells are 70% water by weight Correct Ans-chemistry of life takes place in an aqueous
environment
Monosaccharides Correct Ans-general form (CH2O)n
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