Most proteins containing a signal sequence that binds signal recognition particle at
their amino-terminal ends are sorted to:
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the rough endoplasmic reticulum.
Which statement about mitochondria is true?
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Mitochondria generate ATP.
,Which of the answer choices correctly describes the movement of water across a
selectively permeable membrane during osmosis?
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-The water will move from high water concentration to low water
concentration.
-The water will move from low solute concentration to high solute
concentration.
When NADH accumulates in the cell, how and why does this impact cellular
respiration?
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cellular respiration slows because high levels of NADH inhibit pyruvate
oxidation
Imagine you have radioactively labeled a protein in the lumen of the endoplasmic
reticulum. That protein has an amino-terminal signal sequence that binds the SRP and
no other signal sequences. Where would you predict the labeled protein will
ultimately end up?
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outside the cell
,Many cellular processes represent work that requires the expenditure of energy.
Which of the actions is not a cellular process that requires the cell to expend energy?
a. synthesis of large biomolecules like proteins and nucleic acids
b. diffusion of water into cells
c. keeping sodium ion concentration lower inside a cell than outside the cell
d. contraction of muscle cells
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b. diffusion of water into cells
Diffusion is best described as the random movement of molecules influenced by:
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the thermal energy of the environment and energy transferred from
molecular collisions in the cell.
The plasma membrane is composed of a phospholipid bilayer and associated
proteins. What else is commonly found in the plasma membranes of animal cells?
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cholesterol
A beaker is divided by a membrane that is permeable to water and glucose, but not
to sucrose. Equal volumes of solutions are added to side A and B with the initial
concentrations as shown below. Initially, the liquid levels on both sides are the same.
, Give this one a try later!
the water will be higher on side A than on side B.
The immediate source of electrons for the electron transport chain is:
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NADH and FADH2.
DNP (2,4-dinitrophenol) is an effective weight loss agent that was used in diet pills in
the 1930s. It has since been removed from the market because of serious side effects
such as fever, cataracts, rashes, and sometimes death. DNP inserts into the inner
mitochondrial membrane and allows the flow of protons from the intermembrane
space to the matrix. Based on this information, what effects might you observe?
Select all that apply.
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-reduced ATP production
-decreased difference in pH between the matrix and intermembrane space
-dissipation of the proton gradient
The _____ forms of the electron carriers NAD+/NADH and FAD/FADH2 have high
potential energy.
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their amino-terminal ends are sorted to:
Give this one a try later!
the rough endoplasmic reticulum.
Which statement about mitochondria is true?
Give this one a try later!
Mitochondria generate ATP.
,Which of the answer choices correctly describes the movement of water across a
selectively permeable membrane during osmosis?
Give this one a try later!
-The water will move from high water concentration to low water
concentration.
-The water will move from low solute concentration to high solute
concentration.
When NADH accumulates in the cell, how and why does this impact cellular
respiration?
Give this one a try later!
cellular respiration slows because high levels of NADH inhibit pyruvate
oxidation
Imagine you have radioactively labeled a protein in the lumen of the endoplasmic
reticulum. That protein has an amino-terminal signal sequence that binds the SRP and
no other signal sequences. Where would you predict the labeled protein will
ultimately end up?
Give this one a try later!
outside the cell
,Many cellular processes represent work that requires the expenditure of energy.
Which of the actions is not a cellular process that requires the cell to expend energy?
a. synthesis of large biomolecules like proteins and nucleic acids
b. diffusion of water into cells
c. keeping sodium ion concentration lower inside a cell than outside the cell
d. contraction of muscle cells
Give this one a try later!
b. diffusion of water into cells
Diffusion is best described as the random movement of molecules influenced by:
Give this one a try later!
the thermal energy of the environment and energy transferred from
molecular collisions in the cell.
The plasma membrane is composed of a phospholipid bilayer and associated
proteins. What else is commonly found in the plasma membranes of animal cells?
Give this one a try later!
cholesterol
A beaker is divided by a membrane that is permeable to water and glucose, but not
to sucrose. Equal volumes of solutions are added to side A and B with the initial
concentrations as shown below. Initially, the liquid levels on both sides are the same.
, Give this one a try later!
the water will be higher on side A than on side B.
The immediate source of electrons for the electron transport chain is:
Give this one a try later!
NADH and FADH2.
DNP (2,4-dinitrophenol) is an effective weight loss agent that was used in diet pills in
the 1930s. It has since been removed from the market because of serious side effects
such as fever, cataracts, rashes, and sometimes death. DNP inserts into the inner
mitochondrial membrane and allows the flow of protons from the intermembrane
space to the matrix. Based on this information, what effects might you observe?
Select all that apply.
Give this one a try later!
-reduced ATP production
-decreased difference in pH between the matrix and intermembrane space
-dissipation of the proton gradient
The _____ forms of the electron carriers NAD+/NADH and FAD/FADH2 have high
potential energy.
Give this one a try later!
