BIOL 1201 EXAMS: LATEST A+ GUIDE WITH ESSENTIAL
QUESTIONS AND ANSWERS
metabolic rates in the deep ocean are typically slower than in comparable shallow-living
organisms with similar body temps
True
the color of bioluminescent light is typically
a. blue
b. red
c. green
d. yellow
A
in deep-living angler fish, the female is a parasite on the male
false
volume changes in metabolic biochemical reactions may result from changes in the
organization of water
true
at the average depth of the ocean, the hydrostatic pressure is:
a. 3,800 atm
b. 38,000 atm
c. 38 atm
d. 380 atm
D
consider this pathway: epinephrine, G-protein-linked receptor, G protein, adenylyl cyclase,
cAMP. identify the second messenger
a. G protein
b. cAMP
c. G-protein-linked together
d. adenylyl cyclase
e. GTP
B
, amplification of a chemical signal occurs when
a. phosphorylase and phosphatase activities are balanced
b. a receptor in the plasma membrane activates several G-protein molecules while a signal
molecule is bound to it
c. receptor tyrosine kinases dimerize upon ligand binding
d. a cAMP molecule activated one protein kinase molecule before being converted to AMP
B
binding of a signal molecule to which type of receptor leads directly to a change in the
distribution of anions and/or cations on opposite sides of the membrane?
a. G-protein-linked receptor
b. intracellular receptor
c. receptor tyrosine kinase
d. phosphorylated receptor tyrosine kinase dimer
e. ligand-gated ion channel
E
the activation of receptor tyrosine kinases is always characterized by
a. IP3 binding
b. GTP hydrolysis
c. dimerization and phosphorylation
d. channel protein conformational change
a phosphorylation cascade
C
signal transduction pathways benefit cells for all of the following reasons EXCEPT
a. they help cells respond to signal molecules that are too large or too polar to cross the
plasma membrane
b. variations in the signal transduction pathways can enhance response specifically
c. they enable different cells to respond appropriately to the same signal
d. they help cells use up phosphate generated by ATP breakdown
e. they can amplify a signal
D
lipid-soluable signal molecules, such as testosterone, cross the membranes of all cells but
affect only target cells because
QUESTIONS AND ANSWERS
metabolic rates in the deep ocean are typically slower than in comparable shallow-living
organisms with similar body temps
True
the color of bioluminescent light is typically
a. blue
b. red
c. green
d. yellow
A
in deep-living angler fish, the female is a parasite on the male
false
volume changes in metabolic biochemical reactions may result from changes in the
organization of water
true
at the average depth of the ocean, the hydrostatic pressure is:
a. 3,800 atm
b. 38,000 atm
c. 38 atm
d. 380 atm
D
consider this pathway: epinephrine, G-protein-linked receptor, G protein, adenylyl cyclase,
cAMP. identify the second messenger
a. G protein
b. cAMP
c. G-protein-linked together
d. adenylyl cyclase
e. GTP
B
, amplification of a chemical signal occurs when
a. phosphorylase and phosphatase activities are balanced
b. a receptor in the plasma membrane activates several G-protein molecules while a signal
molecule is bound to it
c. receptor tyrosine kinases dimerize upon ligand binding
d. a cAMP molecule activated one protein kinase molecule before being converted to AMP
B
binding of a signal molecule to which type of receptor leads directly to a change in the
distribution of anions and/or cations on opposite sides of the membrane?
a. G-protein-linked receptor
b. intracellular receptor
c. receptor tyrosine kinase
d. phosphorylated receptor tyrosine kinase dimer
e. ligand-gated ion channel
E
the activation of receptor tyrosine kinases is always characterized by
a. IP3 binding
b. GTP hydrolysis
c. dimerization and phosphorylation
d. channel protein conformational change
a phosphorylation cascade
C
signal transduction pathways benefit cells for all of the following reasons EXCEPT
a. they help cells respond to signal molecules that are too large or too polar to cross the
plasma membrane
b. variations in the signal transduction pathways can enhance response specifically
c. they enable different cells to respond appropriately to the same signal
d. they help cells use up phosphate generated by ATP breakdown
e. they can amplify a signal
D
lipid-soluable signal molecules, such as testosterone, cross the membranes of all cells but
affect only target cells because
