A 45-year-old client who experienced exposure to radiation during ...

[LaDunn]

A 45-year-old client who experienced exposure to radiation during an industrial accident several years prior is being assessed. Which of the following phenomena may underlie the genetic changes that have been noted in the client?
 
  A)
  Base pairs may have been rearranged by the radiation in the accident.
  B)
  Endonucleases may have influenced the DNA structure following exposure.
  C)
  Two paired bases may have exchanged helical position after the accident.
  D)
  The radiation may have produced a redundant or degenerate genetic code.

Question 2

A 6-year-old girl with a diagnosis of Marfan syndrome is being assessed at a community health clinic. Which of the following assessments would be the health care professional's lowest priority?
 
  A)
  A test of the child's visual acuity
  B)
  A musculoskeletal assessment
  C)
  Tests of kidney function
  D)
  Cardiovascular assessment

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Answer to Question 1

Ans:
A

Feedback:

Radiation exposure can cause the rearrangement of base pairs and resultant mutation. Endonucleases facilitate gene repair, and base pairs are not noted to swap positions from their respective sides of the helical strand. Redundant or degenerate genetic code is a normal trait.

Answer to Question 2

Ans:
C

Feedback:

The autosomal dominant disorder of Marfan syndrome is primarily manifested in the ocular, cardiovascular, and skeletal systems. These assessments would take priority over renal assessment.

[LaDunn]

TYSM

[Viet Thy]

Excellent