NURSING EXAM QUESTIONS
PATHOLOGY AND GENETICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Why are red blood cells not used to identify DNA?
|
|
They can’t be separated and tested
|
|
|
Red blood cells die quickly and cannot be used
|
|
|
They do not contain a nucleus
|
|
|
They contain RNA
|
Explanation:
Detailed explanation-1: -Because of the lack of nuclei and organelles, mature red blood cells do not contain DNA and cannot synthesize any RNA, and consequently cannot divide and have limited repair capabilities.
Detailed explanation-2: -Losing the nucleus enables the red blood cell to contain more oxygen-carrying hemoglobin, thus enabling more oxygen to be transported in the blood and boosting our metabolism.
Detailed explanation-3: -Lack of nucleus and cell organelles in the mature red blood cells allows an increased amount of haemoglobin in the cell to ensure transport of a large amount of oxygen. Thus, red blood cells do not contain DNA.
There is 1 question to complete.