Transcript Water and glucose can diffuse. Sucrose can`t diffuse.

CAMPBELL BIOLOGY IN FOCUS
Urry • Cain • Wasserman • Minorsky • Jackson • Reece
© 2014 Pearson Education, Inc.
Water and glucose can diffuse. Sucrose can’t diffuse.
Initially, the solution in side A, with respect to side B,
A.Has a lower solute concentration.
B.Has a higher solute concentration.
C.Has an equal solute concentration.
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Water and glucose can diffuse. Sucrose can’t diffuse.
During the period before equilibrium is reached, which
molecules(s) will show net movement through the membrane?
A. water
B.glucose.
C.Sucrose
D.Water and sucrose
E.Water and glucose
© 2014 Pearson Education, Inc.
Water and glucose can diffuse. Sucrose can’t diffuse.
After the system reaches equilibrium, what changes can be
observed?
A. The water level is higher in side A than in side B
B.The water level is higher in side B an in side A
C.The molarity of glucose is higher in side A than in side B
D.The molarity of sucrose has increased in side A.
E.Both A and C have occurred.
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Which of the following statements about osmosis is correct?
A. If a cell is placed in an isotonic solution, more water will
enter the cell than leaves the cell.
B. Osmotic movement of water into a cell would likely
occur if the cell accumulates water from its environment.
C. The presence of aquaporins (proteins that form
water channels in the membrane) should speed up
the process of osmosis.
D. If a solution outside the cell is hypertonic compared to
the cytoplasm, water will move into the cell by osmosis.
E. Osmosis is the diffusion of water from a region of lower
water concentration to a region of higher water
concentration.
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Which cellular structure is common to all three
domains of life?
A. nucleus
B. endoplasmic reticulum
C. mitochondria
D. phospholipid bilayer cell membrane
E. endocytotic vesicles
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Which of the following is not an argument for the theory
that mitochondria and chloroplasts evolved from
prokaryotic endosymbionts?
A. Mitochondria and chloroplasts have double
membranes.
B. Mitochondria and chloroplasts have their own
ribosomes.
C. Mitochondria and chloroplasts have their own DNA.
D. The mitochondrial and chloroplast genomes are
circular. (Bacteria have circular DNA)
E. All of the above support the endosymbiotic
theory.
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Autophagy removes old damaged organelles like
mitochondria. Decreased autophagy results in
degeneration and inflammation and may result in
the “symptoms” of aging. Which of the following
organelle(s) is/are central to autophagy?
A. smooth ER
B. peroxisomes
C. rough ER
D. lysosomes
E. Golgi apparatus
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What is the correct order of the exocytosis or
secretion pathway?
A. rough ER, endosome, Golgi, smooth ER
B. rough ER, Golgi, smooth ER, exocytosis
C. smooth ER, rough ER, exocytosis, Golgi
D. rough ER, Golgi, transport vesicle, exocytosis
E. rough ER, Golgi, endosome, exocytosis, transport
vesicle
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Which of the following amino acids would most
likely be present in the transmembrane domain of
an integral membrane protein?
A. a charged amino acid like lysine
B. a polar amino acid like serine
C. a special amino acid like glycine or proline
D. a hydrophobic amino acid like valine
E. any of the above, with no preference
© 2014 Pearson Education, Inc.
Which of the following best describes a signal
transduction pathway?
A. binding of a signal molecule to a cell protein
B. catalysis mediated by an enzyme
C. sequence of changes in a series of
molecules resulting in a response
D. binding of a ligand on one side of a membrane
that results in a change on the other side
E. the cell’s detection of a chemical or mechanical
stimulus
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A steroid hormone binds to an intracellular receptor.
When it does, the resulting complex is able to do which
of the following?
A. open channels in the membrane for other
substances to enter
B. open channels in the nuclear envelope for
cytoplasmic molecules to enter
C. mediate the transfer of phosphate groups to/from
ATP
D. act as a transcription factor in the nucleus
E. make water-soluble molecules able to diffuse across
membranes
© 2014 Pearson Education, Inc.
Which of the following is an example of signal
amplification?
A. production of many molecules by many signal
molecules
B. activation of 100 molecules by a single signal
binding event
C. activation of a specific gene by a transcription
factor
D. activation of an enzyme molecule
E. activation of a receptor by a hormone
© 2014 Pearson Education, Inc.