Which vitamin is also known as ascorbic acid? MCQ with Answer and Explanation

Which vitamin is also known as ascorbic acid?
A. Vitamin C
B. Vitamin D
C. Vitamin B₁
D. Vitamin A
Answer: Option A
Solution (By JKSSB Mock Tests)
Vitamin C, chemically ascorbic acid, is a water-soluble vitamin essential for collagen synthesis, wound healing, iron absorption, and antioxidant function. Its deficiency causes scurvy (bleeding gums, weakness). Vitamin A is retinol, B₁ is thiamine, D is calciferol. Vitamin C is abundant in citrus fruits, guava, amla. It is heat-labile and easily destroyed by cooking.

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Practice More Biology Questions

Question #1
The organ that removes old red blood cells and stores iron is the:
A. Liver
B. Kidney
C. Bone marrow
D. Spleen

Correct Answer: Option B


Explanation:
The spleen filters blood, removing aged or damaged RBCs, recycles iron, and stores platelets. The liver also processes hemoglobin products, but the spleen is the primary organ for RBC removal. The kidneys filter blood but don't remove RBCs.

This question belongs to: Science Biology
Question #2
The term 'phylum' in animal taxonomy is equivalent to which category in plant taxonomy?
A. Order
B. Division
C. Class
D. Genus

Correct Answer: Option B


Explanation:
In botanical classification, the term 'Division' corresponds to 'Phylum' in zoological classification. For example, flowering plants are in the Division Magnoliophyta (or Angiosperms), while animals are in Phyla like Chordata. The hierarchy is Kingdom → Division/Phylum → Class → Order → Family → Genus → Species. This terminological difference is a key point in taxonomy.

This question belongs to: Science Biology
Question #3
The pancreas functions as both an exocrine and endocrine gland. Which hormone is secreted by the islets of Langerhans?
A. Pepsin
B. Bile
C. Insulin
D. Gastrin

Correct Answer: Option C


Explanation:
The endocrine part of the pancreas—the islets of Langerhans—contains β-cells that secrete insulin (lowers blood glucose), α-cells secrete glucagon (raises blood glucose), and δ-cells secrete somatostatin. Exocrine pancreas secretes digestive enzymes (trypsin, lipase, amylase). Pepsin is from stomach, bile from liver, gastrin from stomach. Insulin deficiency causes diabetes mellitus.

This question belongs to: Science Biology