Campbell Biology Chapter 11 Test Bank Study Guide Questions and Correct Answers
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Campbell Biology Chapter 11 Test Bank Study Guide Questions and Correct Answers
1) In yeast signal transduction, a yeast cell releases a mating factor, which ________.
2) Yeast cells of mating type a are genetically engineered to produce only mating factor α instead of the normal mating factor a...
Campbell Biology Chapter 11 Test Bank Study
Guide Graded A+
1). 1) in yeast signal transduction, a yeast cell releases a mating factor, which ________.
Ans: C) binds to receptors on the membranes of other types of yeast cells
2). 2) yeast cells of mating type a are genetically engineered to produce only mating factor α
instead of the normal mating factor a. the gene for the mating factor receptor was
unaltered. how will these engineered cells behave in terms of mating?
Ans: C) They will mate with each other or with normal mating type a cells, but not with
normal mating type α cells.
3). 3) in the formation of biofilms, such as those forming on unbrushed teeth, cell signaling
serves which function?
Ans: B) aggregation of bacteria that can cause cavities
4). 4) which of the following is a type of local signaling in which a cell secretes a signal
molecule that affects neighboring cells?
Ans: C) paracrine signaling
5). 5) hormones are chemical substances produced in one organ that are released into the
bloodstream and affect the function of a target organ. which of the following conditions is
required for the target organ to respond to a particular hormone?
Ans: D) The target organ must have receptors that recognize and bind the hormone
molecule.
6). 6) in which of the following ways do plant hormones differ from hormones in animals?
Ans: A) Plant hormones frequently travel through the air as a gas.
7). 7) when a neuron responds to a particular neurotransmitter by opening gated ion channels,
the neurotransmitter is serving as which part of the signal pathway?
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, Ans: C) signal molecule
8). 8) use the following figure to answer the question. which of the following types of signaling
is represented in the figure?
Ans: D) synaptic
9). 9) use the following figure to answer the question. in the figure, the dots in the space
between the two structures represent which of the following?
Ans: C) neurotransmitters
10). 10) which observation suggested to sutherland the involvement of a second messenger in
epinephrine's effect on liver cells?
Ans: B) Glycogen breakdown was observed only when epinephrine was administered to
intact cells.
11). 11) which of the following statements about a g protein signaling pathway is true?
Ans: B) A G protein bound to GTP is in its active state.
12). 12) what is the most likely mechanism by which testosterone functions inside a cell?
Ans: B) It binds with a receptor protein that enters the nucleus and activates
expression of specific genes.
13). 13) scientists have found that extracellular matrix components may induce specific gene
expression in embryonic tissues such as the liver and testes. for this to happen, there must
be direct communication between the extracellular matrix and the developing cells. which
kind of transmembrane protein would most likely be involved in this kind of induction?
Ans: A) integrins
14). 14) one of the major categories of receptors in the plasma membrane functions by forming
dimers, adding phosphate groups, and then activating relay proteins. which type does this?
Ans: D) receptor tyrosine kinases
15).
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