Download Practice Exam 4

Practice Exam 4
1.
In photosynthesis, the light reactions and the Calvin Cycle occur
A. On the thylakoid membrane and in the stroma, respectively
B. On inner membrane of the chloroplast and in the stroma,
respectively
C. In the grana
D. In the stroma
2.
________molecules of CO2, _________ of ATP, and _________ molecules
of NADPH are required to synthesize one glucose molecule.
3.
The first step in the Calvin Cycle of C3 plants is catalyzed by
A. G3P
B. Rubisco
C. RuBP
D. PEP carboxylase
E. More than one of the above is correct
4.
In C4 plants, the Calvin Cycle and CO2 uptake occur in ________________
while in CAM plants, the Calvin Cycle and CO2 uptake occur in
___________________.
A. The same cell; the same cell at different times
B. The same cell; different cells at the same time
C. Different cells; different cells at different times
D. Different cells; the same cell at different times
E. None of the above
5.
Ligands are allosteric regulators of the cellular membrane receptors they
bind.
A. True
B. False
6.
______________ has intrinsic GTPase activity.
A. G-protein linked receptor
B. G protein
C. Adenylyl cyclase
D. Tyrosine kinase dimmer
E. Protein Phosphatase
7.
All of the following are cellular membrane receptors EXCEPT
A. Tyrosine kinase receptor
B. G-protein linked receptor
C. Voltage gated ion channel
D. Ligand gated ion channel
E. All of the above are cellular membrane receptors
8.
Signal transduction pathways have all of the following functions EXCEPT
A. Amplification of a signal
B. Regulation of multiple signaling pathways
C. Generating a cell-type specific response to a signal
D. Breaking down ligands to terminate signal
E. More than one of the above
9.
_______________ stimulates stem elongation by ______________
A.
Auxin, increasing H+ pump activity
B.
Auxin, decreasing turgor pressure
C.
Cytokinins, decreasing H+ pump activity
D.
Cytokinins, decreasing turgor pressure
10.
After removal of the apical bud, it is expected that __________ concentration
will increase and promote the growth of _____________.
A.
Auxin, apical bud
B.
Auxin, axillary buds
C.
Cytokinins, apical bud
D.
Cytokinins, axillary buds
11.
If a seed lacked gibberelin, it would
A.
Germinate after an abnormally short dormancy
B.
Germinate but die before de-etiolation
C.
Not germinate because it could not properly imbibe water
D.
Not germinate because the embryo could not access endosperm
nutrients
12.
In an ethylene over producing mutant, plant shoots would
A.
Never experience triple response
B.
Continually undergo triple response
C.
Exhibit thin, straight, fast-growing stems
D.
Exhibit thick, curved, slow-growing stems
E.
A&C
F.
B&D
13.
An increase of in Pr conformation phytochromes may be associated with
A.
Plants experiencing indirect light
B.
Plants experiencing direct light
C.
Increase in plant height
D.
Axillary growth and branching
E.
A&C
F.
B&D
14.
Neurons communicate with each other via changing the voltage across their
plasma membranes.
A.
True
B.
False
15.
Excitatory postsynaptic potential (EPSP) can be generated by
A.
Na+ entry
B.
increasing K+ exit
C.
Cl- entry
D.
A&B
E.
B&C