Content Frame
Note for screen reader users: There is text between the form elements on this page. To be sure that you do not miss any text, use item by item navigation methods, rather than tabbing from form element to form element

Key Concepts Quiz



This activity contains 22 questions.

Question 1
1
Open Hint for Question 1 in a new window
Lac operon regulatory genes are _____.
 
End of Question 1


Question 2
2
Open Hint for Question 2 in a new window
A mistake during DNA replication prevents the trp repressor from binding to the operon operator. When these cells are placed in a solution containing chicken broth, what happens?
 
End of Question 2


Question 3
3
Open Hint for Question 3 in a new window
What controls the way in which a zygote differentiates?
 
End of Question 3


Question 4
4
Open Hint for Question 4 in a new window
When are DNA molecules the least tightly coiled?
 
End of Question 4


Question 5
5
Open Hint for Question 5 in a new window
Anhidrotic ectodermal dysplasia is an X-linked disorder that results in the absence of sweat glands. How would this condition be manifested in a heterozygous female?
 
End of Question 5


Question 6
6
Open Hint for Question 6 in a new window
In eukaryotic cells, several proteins are involved in the process of transcription. This process involves enhancers that are _____.
 
End of Question 6


Question 7
7
Open Hint for Question 7 in a new window
Alternative RNA splicing has revealed inaccuracies in the one gene–one polypeptide hypothesis. Why?
 
End of Question 7


Question 8
8
Open Hint for Question 8 in a new window
MicroRNA (miRNA) controls _____.
 
End of Question 8


Question 9
9
Open Hint for Question 9 in a new window
Microtubules in the cytoplasm of the cell are composed of two protein subunits, α-tubulin and β-tubulin. Addition of colchicine to the cells results in the disassembly of the microtubules and consequently an increase in the concentration of tubulin subunits. Based on your knowledge of translational regulation, what changes in protein production would occur?
 
End of Question 9


Question 10
10
Open Hint for Question 10 in a new window
A similar protein is found in both a bacterial cell and a single-celled eukaryote. However, the prokaryote seems to produce a much higher amount of the protein. A detailed investigation of the control mechanisms of this protein in both organisms would include which of the following experiments?
 
End of Question 10


Question 11
11
Open Hint for Question 11 in a new window
In embryonic mice, a homeotic gene controls development of the neck, which includes the larynx and thymus. If this gene were deleted, a full-term mouse would show _____.
 
End of Question 11


Question 12
12
Open Hint for Question 12 in a new window
A researcher performs a DNA microarray but forgets to add the enzyme reverse transcriptase. This is important because the enzyme makes _____ from a(n) _____ template.
 
End of Question 12


Question 13
13
Open Hint for Question 13 in a new window
In eukaryotic cells, signal transduction pathways involve _____.
 
End of Question 13


Question 14
14
Open Hint for Question 14 in a new window
Steward's experiment with carrot cells revealed that _____.
 
End of Question 14


Question 15
15
Open Hint for Question 15 in a new window
Using nuclear transplantation, it is possible to generate _____ for therapeutic uses.
 
End of Question 15


Question 16
16
Open Hint for Question 16 in a new window
Since the first animal was produced using a fully differentiated cell, a number of observations have been made. Which of the following statements is true in regard to reproductive cloning?
 
End of Question 16


Question 17
17
Open Hint for Question 17 in a new window
Stem cells could be immensely important in the treatment of which of the following conditions?
 
End of Question 17


Question 18
18
Open Hint for Question 18 in a new window
Proto-oncogenes have the potential to become oncogenes. Which of the following is most likely to lead to cancer?
 
End of Question 18


Question 19
19
Open Hint for Question 19 in a new window
The Rb protein prevents mitosis by inhibiting cells from entering S phase. Human papillomavirus (HPV) is thought to inhibit the action of the Rb protein in cervical epithelial cells. What would be the effect of cervical cells being infected with HPV?
 
End of Question 19


Question 20
20
Open Hint for Question 20 in a new window
Colonoscopy is the examination of the large colon. It allows for visual diagnosis of ulcers and polyps, which may lead to colon cancer. A polyp _____.
 
End of Question 20


Question 21
21
Open Hint for Question 21 in a new window
A mutation in the ras gene can _____.
 
End of Question 21


Question 22
22
Open Hint for Question 22 in a new window
Which of the following cell types would most likely have a high rate of error in DNA replication and consequently a rapid mutation rate?
 
End of Question 22


Clear Answers/Start Over





Pearson Copyright © 1995 - 2011 Pearson Education . All rights reserved.
Legal Notice | Privacy Policy | Permissions

[Return to the Top of this Page]