Which of the following best fits the life cycle of most fungi, known as zygotic meiosis?
A) zygote -> meiosis -> mitosis -> production of gametes -> fertilization
B) zygote -> mitosis -> meiosis -> mitosis -> production of gametes -> fertilization
C) zygote -> mitosis -> meiosis -> production of gametes -> fertilization
D) zygote -> mitosis -> production of gametes -> fertilization
E) zygote -> meiosis -> mitosis -> production of gametes -> mitosis -> fertilization
Give this one a try later!
A. zygote -> meiosis -> mitosis -> production of gametes -> fertilization
Which of the following is not a component of the electron transport chain used in
oxidative phosphorylation?
A) ATP synthase
D) flavin mononucleotide (FMN)
B) cytochromes
,E) iron-sulfur proteins
C) ubiquinone
Give this one a try later!
A. ATP synthase
Five dialysis bags, constructed from a semi-permeable membrane that is
impermeable to sucrose, were filled with various concentrations of sucrose and then
placed in separate beakers containing an initial concentration of 0.6 M sucrose
solution. At 10-minute intervals, the bags were massed (weighed) and the percent
change in mass of each bag was graphed.
Which line or lines represent(s) bags that contain a solution that is hypotonic
compared to the solution in the beaker at the end of 60 minutes?
Give this one a try later!
D
If a cell is placed in a solution that is isotonic relative to the cell's cytosol, the cell will:
A) overall wind up taking water from the solution
B) only allow water molecules to pass out into the solution
C) overall wind up losing water to the solution
D) have no net exchange of water with the solution
E) only allow water molecules to pass in from the solution
Give this one a try later!
, D. have no net exchange of water with the solution
The reaction in the C3 cycle that adds CO2 to ribulose bisphosphate, known as
carbon fixation or CO2 uptake, is catalyzed by the enzyme
A) pyridoxal kinase.
D) rubisco.
B) phosphofructokinase.
E) ATP synthase.
C) PEP carboxylase.
Give this one a try later!
D. rubisco
The conversion of citrate to isocitrate is catalyzed by a specific enzyme. When
oxaloacetate is introduced to a solution containing the enzyme and a saturating
concentration of citrate the rate of the reaction decreases. Adding more citrate does
nothing to overcome the effect of oxaloacetate on the reaction rate. Further studies
reveal that oxaloacetate binds to the enzyme in a different location than citrate does.
Also, it binds reversibly, allowing the enzyme to be fully functional if oxaloacetate is
removed from the solution. In this situation oxaloacetate is acting as
A) an allosteric activator.
D) a competitive inhibitor.
B) a noncompetitive inhibitor.
E) a buffer.
C) a cofactor.
Give this one a try later!
B. a noncompetitive inhibitor
A) zygote -> meiosis -> mitosis -> production of gametes -> fertilization
B) zygote -> mitosis -> meiosis -> mitosis -> production of gametes -> fertilization
C) zygote -> mitosis -> meiosis -> production of gametes -> fertilization
D) zygote -> mitosis -> production of gametes -> fertilization
E) zygote -> meiosis -> mitosis -> production of gametes -> mitosis -> fertilization
Give this one a try later!
A. zygote -> meiosis -> mitosis -> production of gametes -> fertilization
Which of the following is not a component of the electron transport chain used in
oxidative phosphorylation?
A) ATP synthase
D) flavin mononucleotide (FMN)
B) cytochromes
,E) iron-sulfur proteins
C) ubiquinone
Give this one a try later!
A. ATP synthase
Five dialysis bags, constructed from a semi-permeable membrane that is
impermeable to sucrose, were filled with various concentrations of sucrose and then
placed in separate beakers containing an initial concentration of 0.6 M sucrose
solution. At 10-minute intervals, the bags were massed (weighed) and the percent
change in mass of each bag was graphed.
Which line or lines represent(s) bags that contain a solution that is hypotonic
compared to the solution in the beaker at the end of 60 minutes?
Give this one a try later!
D
If a cell is placed in a solution that is isotonic relative to the cell's cytosol, the cell will:
A) overall wind up taking water from the solution
B) only allow water molecules to pass out into the solution
C) overall wind up losing water to the solution
D) have no net exchange of water with the solution
E) only allow water molecules to pass in from the solution
Give this one a try later!
, D. have no net exchange of water with the solution
The reaction in the C3 cycle that adds CO2 to ribulose bisphosphate, known as
carbon fixation or CO2 uptake, is catalyzed by the enzyme
A) pyridoxal kinase.
D) rubisco.
B) phosphofructokinase.
E) ATP synthase.
C) PEP carboxylase.
Give this one a try later!
D. rubisco
The conversion of citrate to isocitrate is catalyzed by a specific enzyme. When
oxaloacetate is introduced to a solution containing the enzyme and a saturating
concentration of citrate the rate of the reaction decreases. Adding more citrate does
nothing to overcome the effect of oxaloacetate on the reaction rate. Further studies
reveal that oxaloacetate binds to the enzyme in a different location than citrate does.
Also, it binds reversibly, allowing the enzyme to be fully functional if oxaloacetate is
removed from the solution. In this situation oxaloacetate is acting as
A) an allosteric activator.
D) a competitive inhibitor.
B) a noncompetitive inhibitor.
E) a buffer.
C) a cofactor.
Give this one a try later!
B. a noncompetitive inhibitor
