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PPSC · PMS Punjab 2023

Zoology, Paper II

100 marks · 3 hours · 9 questions
This paper Zoology · all yearsQ. 1 · Describe various models of plasma…Q. 2 · Elaborate different nuclear and extra…Q. 3 · How the osmoregulation contributes in…Q. 4 · Describe the mechanism of respiration…Q. 6 · Discuss a case of mammalian…Q. 7 · How can genetic drift contribute…Q. 8 · Which mechanisms provide raw materials…Q. 9 · How agroecosystems differ from natural…Q. 10 · Differentiate between gaseous nutrient cycles…With this paper← 2023
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Section A

Q. 1
  1. (a)Describe various models of plasma membrane. Explain the more dynamic model with justification. [10]
  2. (b)Elaborate the extra nuclear organelles in eukaryotic cell with their functions. [10]
(20)
Q. 2
  1. (a)Elaborate different nuclear and extra nuclear cell organelles along with their functions. Draw the labelled diagrams also. [10]
  2. (b)Differentiate between reversible and irreversible enzymatic inhibition. [10]
(20)

Section B

Q. 3
  1. (a)How the osmoregulation contributes in homeostasis? Describe process of osmoregulation in vertebrates. [10]
  2. (b)Write in detail the mechanisms of active membrane potential and resting membrane potential. Support the answer with suitable diagrams. [10]
(20)
Q. 4
  1. (a)Describe the mechanism of respiration in animals, write the role of different organs of respiratory system in detail. [10]
  2. (b)What are different organs involved in circulatory system? Write the cardiovascular mechanism comprehensively. [10]
(20)

Section C

Q. 6
  1. (a)Discuss a case of mammalian embryo who has a blood type antigenically different from its mother. [10]
  2. (b)What is epistasis? Explain a pattern of epistatic gene interaction in humans. [10]
(20)

Section D

Q. 7
  1. (a)How can genetic drift contribute to evolution? What are the causes of genetic drift? [10]
  2. (b)Why is the natural selection considered a primary mechanism of adaptive evolution? [10]
(20)
Q. 8
  1. (a)Which mechanisms provide raw materials for the process of natural selection to act upon? [10]
  2. (b)What is adaptive radiation? Explain a case example of adaptive radiation. [10]
(20)
Q. 9
  1. (a)How agroecosystems differ from natural ecosystems? What are the different types of agroecosystems? [10]
  2. (b)Describe a general model of nutrient cycling showing the primary reservoirs of nutrients. [10]
(20)
Q. 10
  1. (a)Differentiate between gaseous nutrient cycles and sedimentary cycles. [10]
  2. (b)Briefly describe the major steps in nitrogen cycle. [10]
(20)

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About this paper

The 2023 PMS Punjab Zoology paper set by the PPSC. Question wording only; questions marked “Not yet checked” have not been compared with the official paper yet.

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