PATHOLOGY MCQ
GENETICS AND DISEASE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
X-rays
|
|
|
Chemicals like tobacco or pollutants
|
|
|
Drinking water
|
|
|
UV rays
|
Detailed explanation-1: -H2O, NO, and HOCl can cause DNA damage. Without complete repair, mutations will occur by DNA replication, and the accumulation of mutations may cause cancer.
Detailed explanation-2: -Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection. Germline mutations (that occur in eggs and sperm) can be passed on to offspring, while somatic mutations (that occur in body cells) are not passed on.
Detailed explanation-3: -Minute traces of radioactivity are normally found in all drinking water. The concentration and composition of these radioactive constituents vary from place to place, depending principally on the radiochemical composition of the soil and rock strata through which the raw water may have passed.
Detailed explanation-4: -Mutations are caused by environmental factors k nown as mutagens. Types of mutagens include radiation, chemicals, and infectious agents. Mutations may be spontaneous in nature.