Campbell Biology Chapter 11 Test Bank questions and verified correct answers

1) In yeast signal transduction, a yeast cell releases a mating factor, which ________. - correct answer C) 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 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? - correct 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, such as those forming on unbrushed teeth, cell signaling serves which function? - correct answer B) aggregation of bacteria that can cause cavities 4) Which of the following is a type of local signaling in which a cell secretes a signal molecule that affects neighboring cells? - correct answer C) paracrine signaling 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? - correct answer D) The target organ must have receptors that recognize and bind the hormone molecule. 6) In which of the following ways do plant hormones differ from hormones in animals? - correct answer A) Plant hormones frequently travel through the air as a gas. 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? - correct answer C) signal molecule 8) Use the following figure to answer the question. Which of the following types of signaling is represented in the figure? - correct answer D) synaptic 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? - correct answer C) neurotransmitters