Botany Punjab PMS Paper II 2019

PUNJAB PUBLIC SERVICE COMMISSION
COMBINED COMPETITIVE EXAMINATION FOR
RECRUITMENT TO THE POSTS OF
PROVINCIAL MANAGEMENT SERVICE-2019
SUBJECT: BOTANY (PAPER – II)
TIME ALLOWED: THREE HOURS MAXIMUM MARKS: 100
NOTE: Attempt FIVE Questions minimum ONE Question from each Section. Attempt in Urdu or English.
SECTION – I
Q. No. 1: (a) Describe the importance of naturally occurring and synthetic plant hormones.
(b) What is ascent of sap? Describe environmental conditions that affect plant water relation.
(c) Write a note on biochemistry of proteins and fats.
(d) Discuss the process of oxidative phosphorylation in plants. (4 x 5 = 20 Marks)
Q. No. 2: (a) What are the physiological roles of Cytokinins and Abscisic Acid in plant growth?
(b) What is Donnan Equilibrium? Explain this phenomenon with example. (10 + 10 = 20 Marks)

SECTION – II

Q. No. 3:(a) What is the concept of productivity in an ecosystem? Describe its various types.
(b) Describe the vegetation of Pakistan on the basis of climate, altitude, and plant types. (10 + 10 = 20 Marks)
Q. No. 4: (a) What are in-situ and ex-situ conservations? Support your answer with local examples.
(b) What is salinity? Give its causes and control measures in Pakistan. (10 + 10 = 20 Marks)

SECTION – III

Q.No. 5: (a) What is Cytosol or Cytoplasmic matrix? Give the detail account of physical and chemical nature of Cytosol.
(b) Define the ultra-structure of chromosome. (10+10 = 20 Marks)
Q. No. 6: (a) Describe the significance of mitosis and meiosis.
(b) What are the functions of cell membrane and movement across membranes? (10 + 10 = 20 Marks)

SECTION – IV

Q.No.7: Write a detail note on euploidy. (20 Marks)

Q.No. 8: Differentiate between the followings: (5 x 4 = 20 Marks)
(a) Back cross and test crass
(b) Replication and transcription
(c) exans and introns
(d) Transduction and transformation
(e) Induced and spontaneous mutation

SECTION – V

Q.No. 9: Write short notes on any TWO of the followings: (10 +10 = 20 Marks)
(a) Hardy-Weinberg’s Law
(b) Evidences of Evolution
(c) Theory of Natural Selection