Previous Year Questions
2025
ZOOLOGY — HONOURS
Paper : DSCC-10
(Endocrinology and Reproductive Biology)
Full Marks : 75
Section - A
1. Answer any ten questions :
2 × 10
(a) Distinguish between autocrine and paracrine signalling.
(b) What is HbA1c?
(c) What is an orphan receptor?
(d) Distinguish between corpus luteum and corpus albicans.
(e) Classify hormones based on their solubility.
(f) What is atretic follicle?
(g) What role does corpora allata play in metamorphosis of insects?
(h) State two symptoms of Cushing syndrome.
(i) What are second messengers? Give two examples.
(j) State the location and function of leydig cells.
(k) What is reverse T3?
(l) Write down the full forms and functions of PVN and SON.
(m) What is GnRH? Mention its function.
(n) Define LH surge.
(o) What is islet of Langerhans?
Section - B
2. Write short notes on (any three) :
5 × 3
(a) Types of hormone receptors
(b) Graves' disease
(c) Feedback Mechanism of hormone action
(d) Zonations and hormones of adrenal cortex
(e) Acidophils and basophils in anterior pituitary.
Section - C
Answer any four questions.
3. (a) Discuss the mechanism of hormone action using IP3-DAG as the second messenger with an example.
(b) How does hypothalamus integrate neural and endocrine signals? 6+4
(b) How does hypothalamus integrate neural and endocrine signals? 6+4
4. (a) 'Interplay of insulin and glucagon maintains glucose homeostasis.' — Justify.
(b) Distinguish between type I and type II diabetes mellitus. 5+5
(b) Distinguish between type I and type II diabetes mellitus. 5+5
5. (a) Describe the endocrine control of hypothalamo hypophyseal gonadal axis in males.
(b) Using a flowchart, describe the process of biosynthesis of melatonin. 5+5
(b) Using a flowchart, describe the process of biosynthesis of melatonin. 5+5
6. (a) How does follicular cells differ from parafollicular cells functionally?
(b) What role does thyroxin play in fat metabolism?
(c) How does the adrenal gland respond to stress? Add a note on adrenal hormone insufficiency. 2+3+(3+2)
(b) What role does thyroxin play in fat metabolism?
(c) How does the adrenal gland respond to stress? Add a note on adrenal hormone insufficiency. 2+3+(3+2)
7. (a) What are the different cell types present in the testis and what are their functions?
(b) Describe the importance of blood testis barrier.
(c) Describe, in brief, the biosynthesis of estrogen. 3+3+4
(b) Describe the importance of blood testis barrier.
(c) Describe, in brief, the biosynthesis of estrogen. 3+3+4
8. (a) What is the difference between hemimetabolous and holometabolous development in insects?
(b) What is the role of PTTH in regulating ecdysone production?
(c) Show the histological architecture of Graafian follicle with a labelled diagram. 3+3+(2+2)
(b) What is the role of PTTH in regulating ecdysone production?
(c) Show the histological architecture of Graafian follicle with a labelled diagram. 3+3+(2+2)
9. (a) Describe the structure of a nuclear receptor with a suitable diagram.
(b) What is parturition? Add a note on its hormonal control. (4+1)+(2+3)
(b) What is parturition? Add a note on its hormonal control. (4+1)+(2+3)
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