Cellular Signaling - Campbell Biology | Biology+

Course

General Biology

Study Pack

Set 1: Biology and Its Themes

Set 2: Atoms and Molecules

Set 3: The Chemistry of Water

Set 4: Carbon: the Basis of Molecular Diversity

Set 5: Biological Macromolecules and Lipids

Set 6: Energy and Life

Set 7: Cell Structure and Function

Set 8: Cell Membranes

Set 9: Cellular Signaling

Set 10: Cell Respiration

Set 11: Photosynthetic Processes

Set 12: Mitosis

Set 13: Sexual Life Cycles and Meiosis

Set 14: Mendelian Genetics

Set 15: Linkage and Chromosomes

Set 16: Nucleic Acids and Inheritance

Set 17: Expression of Genes

Set 18: Control of Gene Expression

Set 19: Dna Technology

Set 20: The Evolution of Genomes

Set 21: How Evolution Works

Set 22: Phylogenetic Reconstruction

Set 23: Microevolution

Set 24: Species and Speciation

Set 25: Macroevolution

Set 26: Introduction to Viruses

Set 27: Prokaryotes

Set 28: The Origin and Evolution of Eukaryotes

Set 29: Nonvascular and Seedless Vascular Plants

Set 30: Seed Plants

Set 31: Introduction to Fungi

Set 32: An Introduction to Animal Diversity

Set 33: Invertebrates

Set 34: Vertebrates

Set 35: Plant Structure and Growth

Set 36: Transport in Vascular Plants

Set 37: Plant Nutrition

Set 38: Reproduction of Flowering Plants

Set 39: Plant Signals and Behavior

Set 40: The Animal Body

Set 41: Chemical Signals in Animals

Set 42: Animal Digestive Systems

Set 43: Animal Transport Systems

Set 44: Animal Excretory Systems

Set 45: Animal Reproductive Systems

Set 46: Development in Animals

Set 47: Animal Defenses Against Infection

Set 48: Electrical Signals in Animals

Set 49: Neural Regulation in Animals

Set 50: Sensation and Movement in Animals

Set 51: An Overview of Ecology

Set 52: Behavioral Ecology

Set 53: Populations and Life History Traits

Set 54: Biodiversity and Communities

Set 55: Energy Flow and Chemical Cycling in Ecosystems

Set 56: Conservation and Global Ecology

Set 9 Cellular Signaling

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Set 9 Cellular Signaling

(Multiple Choice)

Free

Which of the following statements best explains why testosterone, a lipid-soluble signaling molecule that crosses the membranes of all cells, affects only target cells?

A) Only target cells retain the appropriate genes regulated by testosterone.
B) Only target cells contain the intracellular receptors for testosterone.
C) Only target cells possess the cytosolic enzymes that transduce the signal from testosterone to adenylyl cyclase.
D) Testosterone initiates a phosphorylation cascade only in target cells.

Answer

(Multiple Choice)

Free

Which of the following statements best describes the function of the α factor secreted by yeast cells?

A) It binds to receptors on α cells to stimulate mating between α cells.
B) It binds to receptors on α cells to stimulate mating between a cells and α cells.
C) It binds to receptors on a cells to stimulate mating between a cells.
D) It diffuses through the membranes of a cells, binds to DNA and initiates transcription of a factor genes.

Answer

(Multiple Choice)

Free

If yeast cells of mating type α with normal mating factor receptors are genetically modified to produce only mating factor a, they will mate with which of the following cells?

A) only normal mating type α cells
B) only normal mating type a cells
C) only normal mating type α cells, or with each other
D) only with each other

Answer