BCH 3053 Exam 2 Review-Questions
With 100% Verified Answers.
Steroids - ✔✔lipids characterized by a carbon skeleton consisting of 3 - 6 member and 1 -
5 member fused rings
Cholesterol - ✔✔27 C, derived from acetate and the intermediate step includes isoprene
micelles - ✔✔lipid molecules orient with polar (hydrophilic) head toward water and
nonpolar (hydrophobic) tails away from water
bilayer dynamics - ✔✔fluidity requires acyl chains to be in a liquid-ordered state.
Acyl chains have limited organization and thermal motion (lateral motion).
DNA Types - ✔✔A, right handed, shorter, dehydrated
B, right handed, most DNA, longer
Z, left handed
, Histones + DNA = _ - ✔✔Nucleosome
histones have high amount of + Arg and Lys
AKA beads-on-a-string
topoisomerases function: - ✔✔enzymes that change the linking number of
DNA. required for DNA unwinding and rewinding
DNA gyrase (topoisomerase) - ✔✔type 2 topoisomerase and cuts two strands.
DNA denaturation - ✔✔temperature increase or pH
change absorbance raised over 260 nm (hyper chromaticity)
*PCR
Tm - ✔✔midpoint of transition (melting)
curve depends on GC composition and length of
DNA high salt increases Tm
tRNA (transfer RNA) - ✔✔type of RNA molecule that transfers amino acids to
ribosomes during protein synthesis
mRNA (messenger RNA) - ✔✔a single-stranded RNA molecule that encodes the
information to make a protein
rRNA (ribosomal RNA) - ✔✔combines with proteins to form ribosomes
Central Dogma of Biology - ✔✔DNA-transcription-RNA-translation-protein
Roles of DNA and RNA - ✔✔transfer of energy
With 100% Verified Answers.
Steroids - ✔✔lipids characterized by a carbon skeleton consisting of 3 - 6 member and 1 -
5 member fused rings
Cholesterol - ✔✔27 C, derived from acetate and the intermediate step includes isoprene
micelles - ✔✔lipid molecules orient with polar (hydrophilic) head toward water and
nonpolar (hydrophobic) tails away from water
bilayer dynamics - ✔✔fluidity requires acyl chains to be in a liquid-ordered state.
Acyl chains have limited organization and thermal motion (lateral motion).
DNA Types - ✔✔A, right handed, shorter, dehydrated
B, right handed, most DNA, longer
Z, left handed
, Histones + DNA = _ - ✔✔Nucleosome
histones have high amount of + Arg and Lys
AKA beads-on-a-string
topoisomerases function: - ✔✔enzymes that change the linking number of
DNA. required for DNA unwinding and rewinding
DNA gyrase (topoisomerase) - ✔✔type 2 topoisomerase and cuts two strands.
DNA denaturation - ✔✔temperature increase or pH
change absorbance raised over 260 nm (hyper chromaticity)
*PCR
Tm - ✔✔midpoint of transition (melting)
curve depends on GC composition and length of
DNA high salt increases Tm
tRNA (transfer RNA) - ✔✔type of RNA molecule that transfers amino acids to
ribosomes during protein synthesis
mRNA (messenger RNA) - ✔✔a single-stranded RNA molecule that encodes the
information to make a protein
rRNA (ribosomal RNA) - ✔✔combines with proteins to form ribosomes
Central Dogma of Biology - ✔✔DNA-transcription-RNA-translation-protein
Roles of DNA and RNA - ✔✔transfer of energy
