Cancer is caused by rapid cell division that results in tumor formation. Cancer cells often have
mutations in CDK genes. Explain how a mutation in a CDK might help lead to uncontrolled cell
growth.
What will be an ideal response?
CDKs normally cause the progression of the cell from one stage of the cell cycle to the next by binding
to a stage specific cyclin. A mutant CDK could allow the progression from one cell cycle stage to the
next without binding to the cyclin first.
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During meiosis, a hexaploid hybrid spontaneously eliminates one set of chromosomes (eliminates 1n). What is the most likely result of this deletion?
A. The hybrid will no longer be able to reproduce. B. The hybrid will be able to reproduce with one of the parental species. C. The hybrid will no longer be polyploid. D. The hybrid will be able to reproduce only by self-fertilization. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about polyploidy? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What type of science is a researcher performing if she were conducting experiments to try and map the location of a gene on a particular chromosome?
A. functional genomics B. structural genomics C. proteomics D. functional genomics and proteomics E. structural genomics and proteomics
Smallpox
A. has been eliminated as a naturally occurring infection in human beings. B. still occasionally occurs in third world countries. C. probably only had a human reservoir. D. was dealt with by vaccination. E. has been eliminated as a naturally occurring infection in human beings, AND was dealt with by vaccination.
Refer to Figure 41-2. Which of the following would have an effect on the structure in part 1?
a. potassium concentration
b. chloride concentration
c. neurotoxin
d. tetrodotoxin
e. provocain