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TEST BANK FOR CAMPBELL BIOLOGY 12TH EDITION || CHAPTERS 11||FULL COMPLETE||LATEST
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TEST BANK FOR CAMPBELL BIOLOGY 12TH EDITION || CHAPTERS 11||FULL COMPLETE||LATEST
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ESTUDYTEST BANK FOR CAMPBELL BIOLOGY 12TH EDITION
|| CHAPTERS 11||FULL COMPLETE||LATEST
1. **In yeast signal transduction, what happens when a yeast cell releases a mating factor?**
a) It causes the yeast cell to divide.
b) It triggers cell death in other yeast cells.
c) It binds to receptors on the membranes of other types of yeast cells.
d) It turns off gene expression in yeast cells.
**✔✔ - ANSWER**: c) It binds to receptors on the membranes of other types of yeast cells.
2. **Yeast cells of mating type a are genetically engineered to produce only mating factor α. The gene
for the receptor is unchanged. How will these cells behave in mating?**
a) They will not mate at all.
b) They will mate only with normal mating type α cells.
c) They will mate with each other or with normal mating type a cells, but not with normal mating type
α cells.
d) They will mate only with genetically altered cells.
**✔✔ - ANSWER**: c) They will mate with each other or with normal mating type a cells, but not
with normal mating type α cells.
3. **In the formation of biofilms, like those forming on unbrushed teeth, what role does cell signaling
play?**
a) It kills bacteria.
b) It helps bacteria stick together, leading to cavities.
c) It turns on gene expression in bacteria.
d) It helps bacteria move away from each other.
**✔✔ - ANSWER**: b) It helps bacteria stick together, leading to cavities.
4. **Which of the following is a type of local signaling where a cell sends a signal molecule that affects
nearby cells?**
a) Endocrine signaling
b) Synaptic signaling
c) Paracrine signaling
d) Autocrine signaling
**✔✔ - ANSWER**: c) Paracrine signaling
5. **Hormones are released into the bloodstream and affect target organs. What is needed for the
target organ to respond?**
, ESTUDY
a) The target organ must have the same hormone.
b) The target organ must produce its own hormones.
c) The target organ must be close to the hormone-producing organ.
d) The target organ must have receptors for the hormone.
**✔✔ - ANSWER**: d) The target organ must have receptors for the hormone.
6. **How do plant hormones differ from animal hormones?**
a) Plant hormones often travel through the air as a gas.
b) Plant hormones act only on the plant’s roots.
c) Plant hormones work faster than animal hormones.
d) Plant hormones are made of proteins.
**✔✔ - ANSWER**: a) Plant hormones often travel through the air as a gas.
7. **When a neuron responds to a neurotransmitter by opening ion channels, what role is the
neurotransmitter playing?**
a) Second messenger
b) Receptor
c) Signal molecule
d) Protein kinase
**✔✔ - ANSWER**: c) Signal molecule
8. **Which type of signaling is represented in a figure showing two nerve cells and a gap between
them?**
a) Paracrine signaling
b) Endocrine signaling
c) Autocrine signaling
d) Synaptic signaling
**✔✔ - ANSWER**: d) Synaptic signaling
9. **In the same figure, what do the dots in the space between the nerve cells represent?**
a) Ions
b) Proteins
c) Neurotransmitters
d) Enzymes
**✔✔ - ANSWER**: c) Neurotransmitters
10. **What suggested to Sutherland the involvement of a second messenger in epinephrine's effect on
liver cells?**
a) Glycogen breakdown was observed when epinephrine was used outside cells.
b) Glycogen breakdown was observed only when epinephrine was given to whole cells.
c) Epinephrine was unable to enter liver cells.
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