C. Lead
D. Mercury
E. Uranium
Correct Answer: B. Cadmium
Explanation:
Itai-itai is a disease caused by cadmium poisoning. The symptoms of the disease include weak and
brittle bones. The disease is initially characterized by spinal and leg bone pain. It also includes
complications like kidney failure.
Question: 11
Which of the following produces angiotensinogen?
A. Liver
B. Pancreas
C. Kidney
D. Thyroid gland
E. Pituitary gland
Correct Answer: A. Liver
Explanation:
Angiotensinogen is a serum globulin produced by liver. Angiotensinogen is the precursor of
angiotensin, an oligopeptide involved in regulating blood pressure. Angiotensin increases blood
pressure by enhancing vasoconstriction. Angiotensinogen belongs to the serpin family
Question: 12
Deposition of sediments or sediment accumulation is known as
A. Profundation
B. Aggradation
C. Biocoenosis
D. Trophic succession
E. None of these
Correct Answer: B. Aggradation
Explanation:
Aggradation is the accumulation of sediments resulting in an elevation of land. Aggradation occurs
when the deposition of sediments exceeds the amount of material the system can transport.
Biocoenosis describes the interacting organisms in a habitat.
Question: 13
What is the inactivated X chromosome in females called?
A. Barr body
B. Heterochromatin
C. Euchromatin
D. Nucleosome
E. None of the above
Correct Answer: A. Barr body