PUNJAB PUBLIC SERVICE COMMISSION
Combined Competitive Examination (CCE) 2020
For Recruitment to the Posts of Provincial Management Service (PMS)
SUBJECT: Zoology (Paper-1)
Time Allowed: 3 Hours
Maximum Marks: 100
Note: Attempt FIVE questions, at least TWO questions from each section. Attempt in Urdu or English.
SECTION – I
Q. No. 1:
a) Discuss various types of reproduction in protozoans.
b) Describe sponge morphology and functions of its various cell types.
(10 + 10 = 20 Marks)
Q. No. 2:
a) Write a note on feeding appendages in arthropods.
b) Give an account of parasitic nematodes of man.
(10 + 10 = 20 Marks)
Q. No. 3:
a) What is metamerism? Discuss its advantages in annelids.
b) Explain reproduction and larval development in echinoderms.
(10 + 10 = 20 Marks)
Q. No. 4:
Write short notes on any FOUR of the following:
a) Torsion in gastropods
b) Social insects
c) Polyp vs Medusa
d) Pseudocoelomate body plan
e) Parasitic adaptations in liver fluke (Fasciola hepatica)
(4 × 5 = 20 Marks)
SECTION – II
Q. No. 5:
a) Explain diagnostic characters of chordates.
b) Describe excretion and osmoregulation in fishes.
(10 + 10 = 20 Marks)
Q. No. 6:
a) Discuss features of reptiles that distinguish them from amphibians.
b) Give a detailed account of feathers in birds.
(10 + 10 = 20 Marks)
Q. No. 7:
a) Describe reproduction and development in mammals.
b) Explain early evolution of amphibians as the first land vertebrates.
(10 + 10 = 20 Marks)
Q. No. 8:
Write short notes on any FOUR of the following:
a) Swim bladder
b) Diversity among mammals
c) Aerial adaptations in birds
d) Evolution of vertebrate heart
e) Reproduction in amphibians
(4 × 5 = 20 Marks)
SUBJECT: Zoology (Paper-II)
Time Allowed: 3 Hours
Maximum Marks: 100
Note: Attempt FIVE questions, including at least ONE question from each section. Attempt in Urdu or English.
SECTION – A
Q. No. 1:
a) What are lysosomes? Discuss their types and functions.
b) Differentiate between:
i) Transcription in prokaryotes and eukaryotes
ii) RNA and DNA
(10 + 10 = 20 Marks)
Q. No. 2:
a) What are the steps involved in glycolysis?
b) How many net ATP are formed after complete oxidation of one glucose molecule? Show in tabular form.
c) Describe different ways through which molecules pass through cell membrane.
(5 + 5 + 10 = 20 Marks)
SECTION – B
Q. No. 3:
a) What adaptations are found in organisms for osmoregulation in fresh and marine water?
b) Differentiate between:
i) Sensory and motor nerves
ii) Nerves and tracts
iii) Nuclei and ganglia
iv) CNS and PNS
v) Cranial and spinal nerves
(10 + 10 = 20 Marks)
Q. No. 4:
a) Name hormones secreted by adenohypophysis with their functions.
b) Write a detailed note on nerve impulse generation and transmission. Also explain role of sodium-potassium pump.
(10 + 10 = 20 Marks)
SECTION – C
Q. No. 5:
a) Write notes on:
i) Polygenes
ii) Test cross
iii) Multiple alleles
iv) Codominance
v) Barr bodies
b) What are transgenic animals? How are they used in drug production?
(10 + 10 = 20 Marks)
Q. No. 6:
a) What is gene insertion? Explain its use in treatment of SCID.
b) Differentiate between sex-linked and sex-influenced traits.
c) What is genetic code and its importance?
(10 + 5 + 5 = 20 Marks)
SECTION – D
Q. No. 7:
a) What is reproductive isolation? Discuss its role in speciation and types of speciation.
b) Who was Lamarck? Explain his theory of inheritance of acquired characters.
(10 + 10 = 20 Marks)
Q. No. 8:
a) What is allelic frequency? How does it remain constant (Hardy-Weinberg equilibrium)?
b) Write an essay on mutation including types of point mutation and causes.
(10 + 10 = 20 Marks)
SECTION – E
Q. No. 9:
a) What is acid rain? What pollutants cause it?
b) Why are chlorofluorocarbons linked with skin cancer?
c) What are biogeochemical cycles? Explain carbon and sulphur cycles.
(5 + 5 + 10 = 20 Marks)
Q. No. 10:
a) Differentiate between:
i) Lotic and lentic ecosystem
ii) Primary and secondary succession
iii) Pioneer and climax community
iv) Grazers and browsers
v) Keystone and dominant species
b) Differentiate between arctic tundra and alpine tundra. Also explain adaptations for desert life.
(10 + 10 = 20 Marks)
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