BCH 361 EXAM 1 QUESTIONS WITH VERIFIED
ANSWERS
Organic life forms are distinguished from other in-antimate matters by their? - Answers -
High carbon content
4 classes of biomolecules - Answers - proteins, lipids, carbohydrates, nucleic acids
Proteins are polymers of? - Answers - amino acids
Nucleus acids are polymers of? - Answers - Nucleotides
Lipids are polymers of? - Answers - LIPIDS ARE NOT POLYMERS
Amphipathic molecules (hydrophilic head + hydrophobic tails)
Lipids do not need to polymerize because? - Answers - their amphipathic nature allows
them to self-assemble into "bilayers", which can act as barriers separating one cellular
compartment from another.
Carbohydrates are polymers of? - Answers - monosaccharides
Central Dogma of Biology? - Answers - DNA passed from organism to organism
through DNA replication.
DNA is first converted to RNA through transcription.
RNA is used as code to assemble amino acids together to form protein through
translation using ribosome.
Prokaryotic cell traits? - Answers - no nucleus or organelles
genetic material + ribosomes all in the cytoplasm
cell wall (peptidoglycan)
Cell wall is sandwiched between two membranes in gram negative
bacteria
Chromosome aggregates to form nucleoid
Eukaryotic cell traits? - Answers - Highly compartmentalized
, No cell wall, only
one layer of outer
plasma membrane
lots of organelles
Job of nucleus? - Answers - store genetic info
Job of rough ER? - Answers - synthesize membrane proteins. "Rough" because their
surface is decorated with ribosomes.
Job of smooth ER? - Answers - fatty acid metabolism + alcohol degredation
Job of mitochondria? - Answers - Energy metabolism
site of ATP production through oxidative phosphorylation.
" the energy factory".
Job of Golgi Apparatus? - Answers - molecules meant for secretion are modified and
sorted
Water molecules are? - Answers - polar
The partially negative oxygen attracts partially positive hydrogens from another water
molecule, forming ordered clusters of? - Answers - water molecules
Water can solubilize charged or
polar molecules, but it cannot solubize? - Answers - non-polar, hydrophobic molecules
Four types of weak interactions are commonly found in biological systems? - Answers -
hydrogen bonding, electrostatic interactions, van der waals interactions, hydrophobic
effect
Hydrogen bonding forms between? - Answers - a hydrogen-bearing atom capable of
accommodating significant negative charge (H-bond donor) and an electronegative
atom (H-bond acceptor).
Hydrogen bearing N and O are good H-bond donors (covalently bonded to hydrogen)
N and O are also good H-bond acceptor (weak interaction with hydrogen)
Carbons are not good H-bond donors or acceptors.
water dissociates to form? - Answers - hydroxyl and a proton
ANSWERS
Organic life forms are distinguished from other in-antimate matters by their? - Answers -
High carbon content
4 classes of biomolecules - Answers - proteins, lipids, carbohydrates, nucleic acids
Proteins are polymers of? - Answers - amino acids
Nucleus acids are polymers of? - Answers - Nucleotides
Lipids are polymers of? - Answers - LIPIDS ARE NOT POLYMERS
Amphipathic molecules (hydrophilic head + hydrophobic tails)
Lipids do not need to polymerize because? - Answers - their amphipathic nature allows
them to self-assemble into "bilayers", which can act as barriers separating one cellular
compartment from another.
Carbohydrates are polymers of? - Answers - monosaccharides
Central Dogma of Biology? - Answers - DNA passed from organism to organism
through DNA replication.
DNA is first converted to RNA through transcription.
RNA is used as code to assemble amino acids together to form protein through
translation using ribosome.
Prokaryotic cell traits? - Answers - no nucleus or organelles
genetic material + ribosomes all in the cytoplasm
cell wall (peptidoglycan)
Cell wall is sandwiched between two membranes in gram negative
bacteria
Chromosome aggregates to form nucleoid
Eukaryotic cell traits? - Answers - Highly compartmentalized
, No cell wall, only
one layer of outer
plasma membrane
lots of organelles
Job of nucleus? - Answers - store genetic info
Job of rough ER? - Answers - synthesize membrane proteins. "Rough" because their
surface is decorated with ribosomes.
Job of smooth ER? - Answers - fatty acid metabolism + alcohol degredation
Job of mitochondria? - Answers - Energy metabolism
site of ATP production through oxidative phosphorylation.
" the energy factory".
Job of Golgi Apparatus? - Answers - molecules meant for secretion are modified and
sorted
Water molecules are? - Answers - polar
The partially negative oxygen attracts partially positive hydrogens from another water
molecule, forming ordered clusters of? - Answers - water molecules
Water can solubilize charged or
polar molecules, but it cannot solubize? - Answers - non-polar, hydrophobic molecules
Four types of weak interactions are commonly found in biological systems? - Answers -
hydrogen bonding, electrostatic interactions, van der waals interactions, hydrophobic
effect
Hydrogen bonding forms between? - Answers - a hydrogen-bearing atom capable of
accommodating significant negative charge (H-bond donor) and an electronegative
atom (H-bond acceptor).
Hydrogen bearing N and O are good H-bond donors (covalently bonded to hydrogen)
N and O are also good H-bond acceptor (weak interaction with hydrogen)
Carbons are not good H-bond donors or acceptors.
water dissociates to form? - Answers - hydroxyl and a proton
