Consider the following statements about vitamins: 1. Vitamin K is essential for bone health. 2. Vitamin D deficiency can cause rickets. 3. Vitamin A is also known as tocopherol. Which of the above is/are correct? MCQ with Answer and Explanation
Consider the following statements about vitamins:
1. Vitamin K is essential for bone health.
2. Vitamin D deficiency can cause rickets.
3. Vitamin A is also known as tocopherol.
Which of the above is/are correct?
A. 1, 2, and 3
B. 2 and 3 only
C. 1 and 3 only
D. 1 and 2 only
Answer: Option D
Solution (By JKExamLibrary)
Vitamin K supports bone protein osteocalcin; D deficiency causes rickets. Vitamin A is retinol; vitamin E is tocopherol. So 3 is incorrect.
Explanation:
The endocrine islets of Langerhans in the pancreas contain alpha cells that secrete glucagon and beta cells that secrete insulin, which regulate blood glucose. The liver stores and releases glucose, the spleen filters blood, the kidneys excrete waste. The pancreas also has exocrine functions secreting digestive enzymes.
Explanation:
Diphtheria affects the throat, forming a pseudomembrane, and releases a toxin affecting the heart and nerves. Tetanus is Clostridium, pertussis Bordetella, typhoid Salmonella.
Explanation:
Hershey and Chase (1952) used radioactive isotopes (³²P and ³⁵S) to show that DNA, not protein, enters bacteria during T2 phage infection and is the genetic material. Avery et al. earlier showed transforming principle was DNA. Watson and Crick determined structure, Meselson-Stahl replication mode.
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