PUNJAB PUBLIC SERVICE COMMISSION
Combined Competitive Examination (CCE) 2023
For Recruitment to the Posts of Provincial Management Service (PMS)
SUBJECT: Botany (Paper-1)
Time Allowed: 3 Hours
Maximum Marks: 100
Attempt FIVE questions in all. Attempt in Urdu or English.
Q. No. 1:
Describe characteristic features of diatoms with special reference to their structure, reproduction and ecology. (20 Marks)
Q. No. 2:
Differentiate between the following: (10 + 10 = 20 Marks)
a) Host and Symbiont
b) Whittles and Roots
Q. No. 3:
Write notes on: (10 + 10 = 20 Marks)
a) Parasexual cycle in Fungi
b) Ascus and Basidium development
Q. No. 4:
Describe in detail the general characteristics, classification and economic importance of Bryophytes. (20 Marks)
Q. No. 5:
What is heterospory? Explain seed habit in Selaginella. Also write why it failed to produce seed. (20 Marks)
Q. No. 6:
What are seed ferns? How are they classified? What is the evolutionary significance of seed ferns in geological time scale? (20 Marks)
Q. No. 7:
Differentiate between plesiomorphy and apomorphy. How are these terms useful in determining evolution in angiosperms? (20 Marks)
Q. No. 8:
What is numerical taxonomy? Write its principles, merits, demerits and applications. (20 Marks)
SUBJECT: Botany (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.
Q. No. 1:
a) Explain how glycolysis helps in conversion of hexoses into pyruvic acid.
b) Describe formation of acetyl coenzyme A.
c) Discuss energy transformation in respiration.
(10 + 5 + 5 = 20 Marks)
Q. No. 2:
a) Write mechanism of electron transport system (ETS) in respiration.
b) Differentiate among C3, C4 and CAM plants.
(10 + 10 = 20 Marks)
Q. No. 3:
a) Discuss role of edaphic and climatic factors on plant growth.
b) Briefly describe wetlands and mangroves ecosystems. (20 Marks)
Q. No. 4:
Differentiate between the following: (5 × 4 = 20 Marks)
a) Glyoxisomes and peroxisomes
b) Chromoplast and leucoplast
c) Primary cell wall and secondary cell wall
d) Smooth endoplasmic reticulum and rough endoplasmic reticulum
Q. No. 5:
Describe similarities and differences between DNA and RNA. Also discuss the three main types of RNA involved in protein synthesis. (20 Marks)
Q. No. 6:
Explain the process of linkage. Also differentiate between: (20 Marks)
a) Test cross vs Back cross
b) Monohybrid cross vs Dihybrid cross
Q. No. 7:
a) What is Lamarckism? Discuss its main points with examples including giraffe neck and other examples.
b) Differentiate between microevolution and macroevolution.
(10 + 10 = 20 Marks)
Q. No. 8:
How is random mutation hypothesis different from adaptive mutation hypothesis? Explain with suitable examples. (20 Marks)
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