Biol 212 Worksheet:
Cell Signaling
Supplemental Instruction
Iowa State University
Leader:
Course:
Instructor:
Date:
Greg
Biology 212 (2)
Kukday
10/14/15
1. REVIEW: Describe the process of PCR. Talk about the steps, the components, the uses.
2. What is the difference between genetic engineering and selective breeding?
3. Why is genetic engineering used in agriculture? Why is it used in animals?
4. What is the normal process of genetic engineering in animals?
5. What are some different environmental conditions organisms may have to respond to?
6. Explain the difference between intracellular and intercellular communication.
7. Why are both short and long distance signaling important to our body?
8. What is the endocrine system?
9. What are the four steps of cell-cell signaling?
10. Where are the two locations receptors can be at? Why are both locations needed?
11. What are the three types of cell surface receptors? Describe how each system works.
12. What are second messengers? Give three examples of second messengers.
13. TEST QUESTION: A human hormone gene is cloned into a vector next to a sheep βlactoglobulin promoter. The recombinant plasmid is injected into a sheep oocyte,
fertilized and implanted into a female sheep. The plasmid is also injected directly into
the mother sheep’s blood stream. Which of the following is true?
a. Only the mother’s milk will contain the human hormone.
b. Only the offspring’s milk will contain the human hormone.
c. Both the mother and offspring’s milk will contain the human hormone.
d. Neither the mother nor the offspring’s milk will contain the human hormone.
14. TEST QUESTION: T/F: One kidney cell signaling a second kidney cell is an example of
intracellular signaling; one kidney cell signaling a liver cell is intercellular signaling.
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