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Class 11 Biology — Chapter 19: Chemical Coordination and Integration
60 practice questions · 20 Easy · 20 Medium · 20 Hard
Free NCERT-aligned multiple-choice practice for Class 11 Biology, Chapter 19 (Chemical Coordination and Integration). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 60.
Sample questions
Q1Easy
Master gland of endocrine system:
A.Pituitary✓ correct
B.Thyroid
C.Adrenal
D.Pancreas
Why
Controls many other endocrine glands.
Q2Medium
Glucagon is secreted by ___ cells of pancreas.
A.α (alpha)✓ correct
B.β (beta)
C.δ (delta)
D.Acinar
Why
α-cells secrete glucagon (raises glucose); β secrete insulin.
Q3Hard
Iodine is essential for the synthesis of:
A.Thyroxine (T4)✓ correct
B.Insulin
C.Adrenaline
D.Testosterone
Why
Deficiency causes goitre and hypothyroidism.
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