PUNJAB PUBLIC SERVICE COMMISSION
COMBINED COMPETITIVE EXAMINATION FOR
RECRUITMENT TO THE POSTS OF
PROVINCIAL MANAGEMENT SERVICE -2020
SUBJECT: ZOOLOGY (PAPER-II)
TIME ALLOWED: THREE HOURS MAXIMUM MARKS: 100
NOTE:
i. All the parts (if any) of each Question must be attempted at one place instead of at different places.
ii. Write Q. No. in the Answer Book in accordance with Q. No. in the Q. Paper.
iii. No Page/Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
iv. Extra attempt of any question or any part of the question will not be considered.
Attempt FIVE Questions in All Selecting ONE from each Section. Attempt in Urdu or English.
COMBINED COMPETITIVE EXAMINATION FOR
RECRUITMENT TO THE POSTS OF
PROVINCIAL MANAGEMENT SERVICE -2020
SUBJECT: ZOOLOGY (PAPER-II)
TIME ALLOWED: THREE HOURS MAXIMUM MARKS: 100
NOTE:
i. All the parts (if any) of each Question must be attempted at one place instead of at different places.
ii. Write Q. No. in the Answer Book in accordance with Q. No. in the Q. Paper.
iii. No Page/Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
iv. Extra attempt of any question or any part of the question will not be considered.
Attempt FIVE Questions in All Selecting ONE from each Section. Attempt in Urdu or English.
SECTION-A
Q. No. 1 a) What are lysosomes? Discuss various types of lysosomes. Give detail account of functions of lysosomes.
b) Differentiate between the following
i. Transcription in Prokaryotes and transcription in Eukaryotes.
ii. RNA and DNA. (10+10=20 Marks)
Q. No.2 a) What are the steps involved in the process of Glycolsis?
b) How many net ATPs are formed after complete oxidation of one glucose molecule? Show in tabular form.
c) Cell membrane is the outer covering of the cell and is selectively permeable. Describe the different ways through which molecules pass through the membrane. (5+5+10=20 Marks)
SECTION-B
Q. No. 3 a) What are the adaptations for osmoregulation that are found in organisms living in fresh water and marine water?
b) Differentiate between following
i.Sensory nerves and Motor nerves
ii.Nerves and Tracts
iii.Nuclei and Ganglions
iv.CNS and PNS
v.Cranial and Spinal nerves (10+10=20 Marks)
Q. No.4 a) Name the hormones secreted by the adenohypophysis, their target cells and principal actions.
b) Write detail note on the generation of Nerve Impulse and its transmission between cells. Discuss the role of Sodium Potassium Pump in maintaining the resting membrane potential. (10+10=20 Marks)
Q. No. 1 a) What are lysosomes? Discuss various types of lysosomes. Give detail account of functions of lysosomes.
b) Differentiate between the following
i. Transcription in Prokaryotes and transcription in Eukaryotes.
ii. RNA and DNA. (10+10=20 Marks)
Q. No.2 a) What are the steps involved in the process of Glycolsis?
b) How many net ATPs are formed after complete oxidation of one glucose molecule? Show in tabular form.
c) Cell membrane is the outer covering of the cell and is selectively permeable. Describe the different ways through which molecules pass through the membrane. (5+5+10=20 Marks)
SECTION-B
Q. No. 3 a) What are the adaptations for osmoregulation that are found in organisms living in fresh water and marine water?
b) Differentiate between following
i.Sensory nerves and Motor nerves
ii.Nerves and Tracts
iii.Nuclei and Ganglions
iv.CNS and PNS
v.Cranial and Spinal nerves (10+10=20 Marks)
Q. No.4 a) Name the hormones secreted by the adenohypophysis, their target cells and principal actions.
b) Write detail note on the generation of Nerve Impulse and its transmission between cells. Discuss the role of Sodium Potassium Pump in maintaining the resting membrane potential. (10+10=20 Marks)
SECTION-C
Q. No. 5 a) Write notes on the following
I. Polygenes II. Test cross
III. Multiple alleles IV. Condominance
V. Bar bodies
b) What are transgenic animals? How can they be used to produce drugs?
(10+10=20 Marks)
Q. No. 6 a) What is gene insertion? How is gene insertion being used in treatment of SCID patients?
b) Differentiate between sex linked and sex influenced traits.
c) What is the genetic code and how is it important?
(10+5+5=20 Marks)
SECTION-D
Q. No. 7 a) What is meant by reproductive isolation? How does it play its role in Speciation? Discuss types of Speciation.
b) Who was Lamarck? How did he explain the process of Evolution in his theory of inheritance of acquired characters? (10+10=20 Marks)
Q. No. 8 a) What is meant by Allelic Frequency? How it can remain constant generation after generation? Explain your answer with the help of Hardy-Weinberg Equilibrium.
b) Write an essay on Mutation including kinds of Point Mutation and causes of Mutation. (10+10=20 Marks)
SECTION-E
Q. No. 9 a) What is acid rain? What kinds of pollutants contribute to its formation?
b) Why chloroufluorocarbons are thought to contribute to the skin cancer?
c) What are biogeochemical cycles? Discuss carbon and sulphur cycle in detail.
(5+5+10=20 Marks)
Q. No. 10 a) Differentiate between following:
i. Lotic and Lentic Ecosystem
ii. Primary Succession and Secondary Succession
iii. Pioneer Community and Climax Community
iv. Grazers and Browsers
v. Keystone Species and Dominant Species
b) Differentiate between arctic tundra and alpine tundra. Write various adaptations in organisms for deserted mode of life.
(10+10=20 Marks)
Q. No. 5 a) Write notes on the following
I. Polygenes II. Test cross
III. Multiple alleles IV. Condominance
V. Bar bodies
b) What are transgenic animals? How can they be used to produce drugs?
(10+10=20 Marks)
Q. No. 6 a) What is gene insertion? How is gene insertion being used in treatment of SCID patients?
b) Differentiate between sex linked and sex influenced traits.
c) What is the genetic code and how is it important?
(10+5+5=20 Marks)
SECTION-D
Q. No. 7 a) What is meant by reproductive isolation? How does it play its role in Speciation? Discuss types of Speciation.
b) Who was Lamarck? How did he explain the process of Evolution in his theory of inheritance of acquired characters? (10+10=20 Marks)
Q. No. 8 a) What is meant by Allelic Frequency? How it can remain constant generation after generation? Explain your answer with the help of Hardy-Weinberg Equilibrium.
b) Write an essay on Mutation including kinds of Point Mutation and causes of Mutation. (10+10=20 Marks)
SECTION-E
Q. No. 9 a) What is acid rain? What kinds of pollutants contribute to its formation?
b) Why chloroufluorocarbons are thought to contribute to the skin cancer?
c) What are biogeochemical cycles? Discuss carbon and sulphur cycle in detail.
(5+5+10=20 Marks)
Q. No. 10 a) Differentiate between following:
i. Lotic and Lentic Ecosystem
ii. Primary Succession and Secondary Succession
iii. Pioneer Community and Climax Community
iv. Grazers and Browsers
v. Keystone Species and Dominant Species
b) Differentiate between arctic tundra and alpine tundra. Write various adaptations in organisms for deserted mode of life.
(10+10=20 Marks)
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