Biochem module 1 exam
1. Which one of the following has the cellular compo- Amino acid < pro-
nents arranged in order of increasing size? tein < ribosome <
mitochondrion
2. The macromolecules that serve in the storage and nucleic acids
transmission of genetic information are:
3. Humans maintain a nearly constant level of hemo- dynamic steady
globin by continually synthesizing and degrading it. state.
This is an example of a(n):
4. The major carrier of chemical energy in all cells is: ATP
5. The three-dimensional structure of macromole- carbon-carbon-
cules is formed and maintained primarily through bonds
noncovalent interactions. Which one of the follow-
ing is not considered a noncovalent interaction?
6. Which one of the following is not among the four phosphorus
most abundant elements in living organisms?
7. Energy requiring metabolic pathways that yield Anabolic
complex molecules from simpler precursors are:
8. In eukaryotes, the nucleus is enclosed by a double nuclear envelope
membrane called the:
9. What 5 characteristics distinguish living organisms Chemical complexi-
from inanimate objects? ty, biological struc-
tures, extract en-
vironmental energy,
living state, self
replication
10. All cells are surrounded by a plasma membrane barrier to the free
composed of lipid and protein molecules. What is passage of inorgan-
the function of the plasma membrane? ic ions and most
other charged or
polar compounds
into or out of the
, Biochem module 1 exam
cell, transportation,
or communication
11. E. coli is known as a gram-negative bacterial Gram neg: Low
species. (a) How is this determined? (b) How affinity for dye; sin-
do gram-negative bacteria differ structurally from gle layer of peptido-
gram-positive bacteria? glycan + outer layer
12. a) List the types of noncovalent interactions that are a) H-bonds, ion-
important in providing stability to the three-dimen- ic interactions, van
sional structures of macromolecules. der waals, and hy-
b)Why is it important that these interactions be non- drophobic
covalent, rather than covalent, b) easy to form and
break using less en-
ergy. Help with flexi-
bility
13. Describe the relationship between a living organism Living organisms:
and its surroundings in terms of both matter and Open systems (ex-
energy. change matter and
energy with sur-
roundings; no equi-
librium with sur-
roundings)
14. What is meant by feedback inhibition and why is it biochem pathway
important in a living organism? regulation reaction
product inhibits an
earlier step in the
pathway; ensures
energy is not wast-
ed by an organ-
ism producing mol-
ecules it does not
need
15. Dynamic steady state consistent build and
degradation
16.
, Biochem module 1 exam
What are the consequences of the fact that "living need to use stored
organisms" are not in equilibrium with their sur- energy for ba-
roundings sic-functions
17. Catabolism vs Anabolism C: Nutrients to sim-
ple products; waste
products CO2 and
H2O; produces en-
ergy
A: Biosynthesis; re-
quires energy
18. Feedback pathways Neg: decreases
product production
by inhibiting en-
zyme activity
Pos: Increases
product production
by stimulating en-
zymes
19. Prokaryotic vs eukaryotic cells nucleus/membrane
bound organelles
20. Major difference between a plant and animal cell cell wall, chloro-
plast; lysosomes,
centrosome
21. Cell fractionation methods Differential: Pellets
form based on den-
sity
Density-gradient:
Separated by
density with no
pellet
22. A true statement about hydrohobic interactions is are the driving force
that they in the formation of
micelles of amphi-
1. Which one of the following has the cellular compo- Amino acid < pro-
nents arranged in order of increasing size? tein < ribosome <
mitochondrion
2. The macromolecules that serve in the storage and nucleic acids
transmission of genetic information are:
3. Humans maintain a nearly constant level of hemo- dynamic steady
globin by continually synthesizing and degrading it. state.
This is an example of a(n):
4. The major carrier of chemical energy in all cells is: ATP
5. The three-dimensional structure of macromole- carbon-carbon-
cules is formed and maintained primarily through bonds
noncovalent interactions. Which one of the follow-
ing is not considered a noncovalent interaction?
6. Which one of the following is not among the four phosphorus
most abundant elements in living organisms?
7. Energy requiring metabolic pathways that yield Anabolic
complex molecules from simpler precursors are:
8. In eukaryotes, the nucleus is enclosed by a double nuclear envelope
membrane called the:
9. What 5 characteristics distinguish living organisms Chemical complexi-
from inanimate objects? ty, biological struc-
tures, extract en-
vironmental energy,
living state, self
replication
10. All cells are surrounded by a plasma membrane barrier to the free
composed of lipid and protein molecules. What is passage of inorgan-
the function of the plasma membrane? ic ions and most
other charged or
polar compounds
into or out of the
, Biochem module 1 exam
cell, transportation,
or communication
11. E. coli is known as a gram-negative bacterial Gram neg: Low
species. (a) How is this determined? (b) How affinity for dye; sin-
do gram-negative bacteria differ structurally from gle layer of peptido-
gram-positive bacteria? glycan + outer layer
12. a) List the types of noncovalent interactions that are a) H-bonds, ion-
important in providing stability to the three-dimen- ic interactions, van
sional structures of macromolecules. der waals, and hy-
b)Why is it important that these interactions be non- drophobic
covalent, rather than covalent, b) easy to form and
break using less en-
ergy. Help with flexi-
bility
13. Describe the relationship between a living organism Living organisms:
and its surroundings in terms of both matter and Open systems (ex-
energy. change matter and
energy with sur-
roundings; no equi-
librium with sur-
roundings)
14. What is meant by feedback inhibition and why is it biochem pathway
important in a living organism? regulation reaction
product inhibits an
earlier step in the
pathway; ensures
energy is not wast-
ed by an organ-
ism producing mol-
ecules it does not
need
15. Dynamic steady state consistent build and
degradation
16.
, Biochem module 1 exam
What are the consequences of the fact that "living need to use stored
organisms" are not in equilibrium with their sur- energy for ba-
roundings sic-functions
17. Catabolism vs Anabolism C: Nutrients to sim-
ple products; waste
products CO2 and
H2O; produces en-
ergy
A: Biosynthesis; re-
quires energy
18. Feedback pathways Neg: decreases
product production
by inhibiting en-
zyme activity
Pos: Increases
product production
by stimulating en-
zymes
19. Prokaryotic vs eukaryotic cells nucleus/membrane
bound organelles
20. Major difference between a plant and animal cell cell wall, chloro-
plast; lysosomes,
centrosome
21. Cell fractionation methods Differential: Pellets
form based on den-
sity
Density-gradient:
Separated by
density with no
pellet
22. A true statement about hydrohobic interactions is are the driving force
that they in the formation of
micelles of amphi-
