1. How Genes are Controlled
Chapter 11
How Genes are Controlled

2. Concept Check
Which of the following cells would likely express the genes that code for glycolysis enzymes?
Muscle cell
White blood cell
Pancreas beta cells
All of these cells
None of these cells
Answer: 4

3. Answer
Which of the following cells would likely express the genes that code for glycolysis enzymes?
All of these cells

4. Concept Check
Which of the following cells would likely express the genes that code for the hormone insulin?
Muscle cell
White blood cell
Pancreas beta cells
All of these cells
None of these cells
Answer: 3

5. Answer
Which of the following cells would likely express the genes that code for the hormone insulin?
3) Pancreas beta cells

6. Concept Check
Which of the following cells would likely express the genes that code for the hormone gastrin?
Muscle cell
White blood cell
Pancreas beta cells
All of these cells
None of these cells
Answer: 5

7. Answer
Which of the following cells would likely express the genes that code for the hormone gastrin?
None of these cells

8. Concept Check
Nuclear transplantation experiments provide strong evidence for which of the following?
Differentiated vertebrate cells still maintain their full complement of DNA.
Differentiated vertebrate cells do not maintain their full complement of DNA.
Vertebrate cloning is not feasible.
Cell differentiation is a irreversible process.
Answer: 1

9. Answer
Nuclear transplantation experiments provide strong evidence for which of the following?
Differentiated vertebrate cells still maintain their full complement of DNA.

10. Concept Check
Which of the following development events trigger the definition of the head and tail regions in a fruit fly?
Activation of the homeotic genes in the developing embryo.
Accumulation of “head” mRNA in one end of the unfertilized egg.
Gravitational response in the developing embryo.
Answer: 2

11. Answer
Which of the following development events trigger the definition of the head and tail regions in a fruit fly?
Accumulation of “head” mRNA in one end of the unfertilized egg.

12. Interpreting Data
If cancer results from a single gene mutation in a somatic cell, which of the following graphs would describe the incidence rate of cancer as a function of age? Hint: The probability of mutation leading to cancer would be constant and independent of age. 1. 2. 3.
Answer: 2

13. Answer
If cancer results from a single gene mutation in a somatic cell, which of the following graphs would describe the incidence rate of cancer as a function of age? Hint: The probability of mutation leading to cancer would be constant and independent of age. 1. 2. 3.

14. Interpreting Data
If cancer results from several, accumulated gene mutations in a single somatic cell, which of the following graphs would describe the incidence rate of cancer as a function of age? Hint: The probability of cancer would increase with additional mutations. 1. 2. 3.
Answer: 3

15. Answer
If cancer results from several, accumulated gene mutations in a single somatic cell, which of the following graphs would describe the incidence rate of cancer as a function of age? Hint: The probability of cancer would increase with additional mutations. 1. 2. 3.

16. Interpreting Data
Which graph best represents the natural occurrence of cancer as a function of age? 1. 2. 3.
Answer: 3

17. Answer
Which graph best represents the natural occurrence of cancer as a function of age? 1. 2. 3.

18. Strongly A B C D E Strongly
Biology and Society
This insufficiently developed human embryo was produced by inserting a nucleus from an adult cell into a human egg cell—a potential clone. The purpose was to develop embryonic stem cells. An embryonic stem cell can potentially develop into any of the specialized cell tissues/organs of an adult.
Despite its promise, do you think that therapeutic cloning is ethically justifiable?
Disagree Agree
Strongly A B C D E Strongly

19. Strongly A B C D E Strongly
Biology and Society
Embryonic stem cells are currently derived from extra human blastocysts that sometimes result from in vitro fertilization techniques. Currently in the U.S. stem cell research supported by U.S. agencies is restricted to only a small number of stem cell lines. Other countries are going ahead with embryonic stem cell research.
Do you support the current U.S. governmental policy on stem cell research?
Disagree Agree
Strongly A B C D E Strongly

20. Strongly A B C D E Strongly
Biology and Society
Cigarette smoke and tobacco products are known carcinogens linked to a number of the most common cancers that occur in the U.S.
Do you support non-smoking regulations for public places such as restaurants, bars, and public buildings?
Disagree Agree
Strongly A B C D E Strongly