Walden PUBH6170 week 9 quiz

Question 1

1. Tumor suppressor genes function to increase the activity of cells during times of stress or when conditions do not favor cell division.

   Answer

   True

   False

1 points

Question 2

1. How does a proto-oncogene differ from an oncogene?

   Answer

   		Proto-oncogenes code for proteins that regulate expression of structural genes; oncogenes code for nucleic acids involved in cell division.
   		Proto-oncogenes control normal cell division; oncogenes contribute to the development of cancer.
   		When oncogenes become damaged, they become proto-oncogenes.
   		Oncogenes activate tumor suppressor genes; proto-oncogenes repress tumor suppressor genes.
   		Proto-oncogenes cause cells to self-destruct when damaged; oncogenes cause damaged cells to repair themselves.

1 points

Question 3

1. The dietary carcinogen aflatoxin can be found in:

   Answer

   		fresh fruits.
   		red meats.
   		salt.
   		alcohol.
   		raw peanut butter.

1 points

Question 4

1. The most important aspect in the treatment of cancer is that the cancer be diagnosed as early as possible. Early detection of cancer increases the chance that treatment will be successful.

   Answer

   True

   False

1 points

Question 5

1. How are antiangiogenic drugs used in the treatment of cancer?

   Answer

   		These drugs stop the replication of DNA so cancer cells cannot reproduce.
   		These drugs stop the growth of blood vessels into the tumor, so the cells “starve” to death.
   		These drugs stop metastasis.
   		These drugs stimulate the immune system.
   		These drugs stimulate the production of free radicals, which kill cancer cells.

1 points

Question 6

1. Which of the following is not true regarding the immune system and cancer?

   Answer

   		Some cancers can suppress the immune system.
   		Some cancer cells produce abnormal proteins on their cell surfaces that the immune system can use to detect these cells.
   		Cancer cells can be killed by immune system cells.
   		Because cancer cells are the individual’s cells, there is no way for the immune system to differentiate between normal cells and cancer cells.
   		Many cancer cells do not display “self” proteins.

1 points

Question 7

1. In some cases, why doesn’t the immune system recognize and destroy a cancer?

   Answer

   		Cancer cells that produce abnormal antigens sometimes shed them.
   		Cancer cells have less surface receptors needed for proper activation of T cells.
   		Cancer cells have enough “self” surface markers as to be identified as normal cells.
   		Cancer cells develop from normal cells that cannot regulate cell division.
   		all of the above

1 points

Question 8

1. The chance that an individual in the United States will experience some form of cancer in their lifetime is:

   Answer

   		1 in 1000.
   		1 in 10.
   		1 in one million.
   		1 in 3.
   		1 in 25.

1 points

Question 9

1. Common side effects associated with chemotherapy are due to:

   Answer

   		fevers induced by the chemicals.
   		death of cancer cells and their subsequent removal from the body.
   		change in blood pH caused by the chemicals.
   		death of normal cells caused by the chemicals.
   		destruction of RNA in most normal cells.

1 points

Question 10

1. Tumor suppressor genes function to

   Answer

   		prevent gene expression of oncogenes.
   		prevent release of growth factors.
   		slow down unchecked cell growth, differentiation, division, or adhesion.
   		produce proto-oncogenes.
   		stimulate metastasis.

1 points

Question 11

1. A mass of rapidly dividing cells that have potentially lost the ability to regulate cell division is

   Answer

   		a neoplasm
   		angiogenesis
   		dysplasia
   		hyperplasia
   		keratosis

1 points

Question 12

1. A mutated form of the p53 gene has been identified in tumors of all of the following types of cancer except:

   Answer

   		colon.
   		bladder.
   		breast.
   		stomach.
   		skin.

1 points

Question 13

1. Not only does smoking cause lung cancer, it also doubles the risk of which of the following types of cancer?

   Answer

   		stomach
   		prostate
   		bladder
   		colon
   		brain

1 points

Question 14

1. Which of the following is not true regarding cervical cancer?

   Answer

   		The Pap test can be used to diagnose cervical cancer.
   		The risk of developing cervical cancer increases with infection by the herpes simplex virus.
   		Cervical cancer may be one of the first cancers to be prevented with the use of a vaccine.
   		Women with multiple sex partners are at higher risk for cervical cancer.
   		The survival rate for women with cervical cancer is fairly high.

1 points

Question 15

1. Diet, including what is and what is not consumed, is believed to play a major role in determining whether or not an individual develops cancer.

   Answer

   True

   False

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