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1. 1) In yeast signal transduction, a yeast cell releases C) binds to receptors on the
a mating factor, which ________. membranes of other types of
yeast cells
2. 2) Yeast cells of mating type a are genetically engi- C) They will mate with each
neered to produce only mating factor α instead of other or with normal mating
the normal mating factor a. The gene for the mating type a cells, but not with nor-
factor receptor was unaltered. How will these engi- mal mating type α cells.
neered cells behave in terms of mating?
3. 3) In the formation of biofilms, such as those form- B) aggregation of bacteria
ing on unbrushed teeth, cell signaling serves which that can cause cavities
function?
4. 4) Which of the following is a type of local signaling C) paracrine signaling
in which a cell secretes a signal molecule that affects
neighboring cells?
5. 5) Hormones are chemical substances produced in D) The target organ must have
one organ that are released into the bloodstream receptors that recognize and
and affect the function of a target organ. Which of bind the hormone molecule.
the following conditions is required for the target
organ to respond to a particular hormone?
6. 6) In which of the following ways do plant hormones A) Plant hormones frequently
differ from hormones in animals? travel through the air as a gas.
7. 7) When a neuron responds to a particular neuro- C) signal molecule
transmitter by opening gated ion channels, the neu-
rotransmitter is serving as which part of the signal
pathway?
8. D) synaptic
, Campbell Biology Chapter 11 Test Bank
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8) Use the following figure to answer the question.
Which of the following types of signaling is repre-
sented in the figure?
9. 9) Use the following figure to answer the question. C) neurotransmitters
In the figure, the dots in the space between the two
structures represent which of the following?
10. 10) Which observation suggested to Sutherland the B) Glycogen breakdown was
involvement of a second messenger in epineph- observed only when epineph-
rine's effect on liver cells? rine was administered to in-
tact cells.
11. 11) Which of the following statements about a G B) A G protein bound to GTP
protein signaling pathway is true? is in its active state.
12. 12) What is the most likely mechanism by which B) It binds with a receptor
testosterone functions inside a cell? protein that enters the nucle-
us and activates expression of
specific genes.
13. 13) Scientists have found that extracellular matrix A) integrins
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?
14. 14) One of the major categories of receptors in D) receptor tyrosine kinases
the plasma membrane functions by forming dimers,
adding phosphate groups, and then activating relay
proteins. Which type does this?