a. Receptors located inside the cell b. The protected tip of grass or a

stem of a plantc. A molecule that absorbs

specific wavelengths of lightd. Programmed death of a celle. Pigments involved in the

specific light responsef. A steroid hormone made of 4 6-

carbon ringsg. A change in an organism to

react specifically toward light

Cell Signaling (2)Supplemental InstructionIowa State University

Leader: Caleb I. Course: BIOL 212

Instructor: Dr. KukdayDate: 3/6/2017

1.) Vocabulary Review- Match the Terms & Definitions:i.

ii. Glucocorticoid ___ iii. Apoptosis ____iv. Intracellular Receptors _____v. Phototropic Response ____

vi. Coleoptile ____vii. Pigment ______

viii. Phototropins ______

2.) Can you predict the effect of mutations in proteins that are part of cell signaling pathways? ----- Discuss in your groups examples of how mutations could effect cell signaling pathways: Think of examples from class, and talk about how cells could be affected by mutations. (Look at both cell signaling powerpoints).

3.) Can you identify potential therapeutic strategies for compensating in overactive or underactive signaling?

i. If a cell is overactive we could:

ii. If a cell is underactive we could:

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4.) Can you summarize the steps in the process of signal transduction in plants? ----- List the 3 main steps below then list what occurs in each of those steps:

i.

ii.

iii.

5.) Can you analyze data from key experiments that led to the discovery of auxin as the hormone signal in the phototropic response? -----

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Dr. Kukday’s “Can You?” Questions: (Italicized steps were discussed in cell signaling 1)Cell Signaling:

1.) Can you connect the 4 steps in cell signaling to each of the examples provided? For example, what part of the apoptosis pathway can be considered signal processing?

2.) Can you identify the types of receptors (cell surface and intracellular) that a cell uses to receive signals from their environment?

3.) Can you describe the role of cAMP in signal transduction? Are there examples of other molecules that perform a similar role?

4.) Can you illustrate key steps in the signaling pathway for EGF and epinephrine? How is the signal transmitted in both cases? What is the final response for each pathway? What are the differences between the two pathways?

5.) Can you identify steps in the apoptosis pathway?6.) Can you predict the effect of mutations in proteins that are part of cell signaling

pathways?

1060 Hixson-Lied Student Success Center v 515-294-6624 v sistaff@iastate.edu v http://www.si.iastate.edu

7.) Can you identify potential therapeutic strategies for compensating in overactive or underactive signaling?

Plant Cell Signaling:1.) Can you summarize the steps in the process of signal transduction in plants? 2.) Can you identify two pathways that are used to transduce signals inside plant cells? 3.) Can you identify responses that plant cells can launch after receiving signals from the

outside environment? 4.) Can you analyze data from the experiment that led to the discovery of the mechanism of

PHOT1, the phototropic receptor protein? 5.) Can you analyze data from key experiments that led to the discovery of auxin as the

hormone signal in the phototropic response?

1060 Hixson-Lied Student Success Center v 515-294-6624 v sistaff@iastate.edu v http://www.si.iastate.edu