Important Biology MCQs on Hormones & Glands for Govt Exams

1. Which hormone is released in greater amounts during excitement?
A) Cortisone
B) Serotonin
C) Adrenaline
D) Estrogen
Ans: C) Adrenaline


2. Which hormone is commonly referred to as the “emergency hormone”?
A) Adrenaline
B) Thyroxine
C) Vasopressin
D) Insulin
Ans: A) Adrenaline


3. Adrenaline belongs to which biological class?
A) Hormone
B) Enzyme
C) Protein
D) Fat
Ans: A) Hormone


4. Which is the male sex hormone?
A) Progesterone
B) Estrogen
C) Testosterone
D) Insulin
Ans: C) Testosterone


5. Which gland is found only in females?
A) Thyroid
B) Pituitary
C) Ovary
D) Adrenal
Ans: C) Ovary


6. Cowper’s glands are part of which system in the human body?
A) Digestive
B) Endocrine
C) Reproductive
D) Nervous
Ans: C) Reproductive


7. Which hormone stimulates heartbeat?
A) Thyroxine
B) Gastrin
C) Glycogen
D) Dopamine
Ans: A) Thyroxine


8. Which of the following is the largest endocrine gland?
A) Thyroid
B) Parathyroid
C) Adrenal
D) Pituitary
Ans: A) Thyroid


9. What is the largest gland in the human body?
A) Thyroid
B) Liver
C) Kidney
D) Pancreas
Ans: B) Liver


10. Which hormone controls and stimulates the development of mammary glands?
A) Pituitary hormone
B) Thyroid hormone
C) Estrogen & Progesterone
D) Adrenal hormone
Ans: C) Estrogen & Progesterone


11. Which hormone is considered the emergency hormone in humans?
A) Thyroxine
B) Insulin
C) Adrenaline
D) Progesterone
Ans: C) Adrenaline


12. Which type of medicine enhances urine secretion?
A) Adrenaline
B) Moduretic
C) Diuretic
D) Natriuretic
Ans: C) Diuretic


13. Which chemical is released by animals to attract others of the same species?
A) Hormones
B) Nucleic acids
C) Pheromones
D) Steroids
Ans: C) Pheromones


14. Which gland secretes the enzyme diastase?
A) Salivary gland
B) Stomach
C) Liver
D) Pancreas
Ans: A) Salivary gland


15. The hormone insulin is secreted by which cells of the pancreas?
A) Alpha cells
B) Delta cells
C) Nerve cells
D) Beta cells
Ans: D) Beta cells


16. Which cells in the pancreas are responsible for producing insulin?
A) Thymus
B) Estrogen
C) Corpus epididymis
D) Islets of Langerhans
Ans: D) Islets of Langerhans


17. What substance is stored in the liver as glycogen?
A) Intestine
B) Stomach
C) Pancreas
D) Liver
Ans: D) Liver


18. Where is bile stored in the human body?
A) Gallbladder
B) Duodenum
C) Liver
D) Spleen
Ans: A) Gallbladder


19. Which acid is found in gastric juice?
A) Hydrochloric acid
B) Nitric acid
C) Sulphuric acid
D) Ascorbic acid
Ans: A) Hydrochloric acid


20. What is the name of the membrane that covers the lungs?
A) Pleura
B) Pericardium
C) Peritoneum
D) Mesothelium
Ans: A) Pleura


21. A person’s eye color (brown, blue, black) is determined by the pigment in the:
A) Pupil
B) Cornea
C) Iris
D) Choroid
Ans: C) Iris


22. What is an antibiotic?
A) Human-made chemical against microbes
B) Microbial product that inhibits other microbes
C) Produced by blood cells against bacteria
D) Product of blood infections
Ans: B


23. Allosomes are also known as:
A) Cell organelles
B) Plant hormones
C) Alleles
D) Sex chromosomes
Ans: D) Sex chromosomes


24. How many chromosomes are found in a normal human cell?
A) 23
B) 46
C) 22
D) 48
Ans: B) 46


25. Amniocentesis is a technique used for:
A) Assessing fetal health
B) Determining amino acid sequences
C) Inducing abortion
D) Artificial insemination
Ans: A) Assessing fetal health

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