FAISALABAD BOARD 2012
PAPER BIOLOGY
PART-II
Time: 20 Min.
(Objective Part)
Marks: 17
Note: Four answers are given against each question in columns A, B, C and D. Select the right answer and on the separate Answer Sheet, fill the circle A, B, C or D with pen or marker in front of that question number.

Question#1

• Hydrophytes posses:
  
  (a) Small leaves
  (b) Large leaves
  (c) Less water
  (d) Stomata on lower surface of leaves
  
  
• The incidence of calcium phosphate stones in kidneys are:
  
  (a) 20%
  (b) 15%
  (c) 18%
  (d) 25%
  
  
• The group of cells usually lack secondary wall and have angular thickenings are:
  
  (a) Sclerenchyma
  (b) Cpllenchyma
  (c) Fibers
  (d) Vessels
  
  
• The growing tip of young stem moves in zig-zag fashion of the apex is:
  
  (a) Hyponasty
  (b) Epinasty
  (c) Nutation
  (d) Haptonasty
  
  
• The plant movement in response to stimulus of touch is:
  
  (a) Turgor
  (b) Tactic
  (c) Phototropism
  (d) Thigmotropism
  
  
• In humans, the pairs of cranial nerves are:
  
  (a) 12
  (b) 14
  (c) 16
  (d) 18
  
  
• The uric acid is excreted out as solid ecreta in:
  
  (a) Starfish
  (b) Planaria
  (c) Earthworm
  (d) Cockroach
  
  
• Diffused type of nervous system in present in:
  
  (a) Planaria
  (b) Earthworm
  (c) Hydra
  (d) Man
  
  
• Hindbrain includes the medulla, pons and:
  
  (a) Cerebrum
  (b) Cerebellum
  (c) Thalamus
  (d) Amygdala
  
  
• The 5-carbon sugar in DNA is:
  
  (a) Maltose
  (b) Ribose
  (c) Deoxyribose
  (d) Lactose
  
  
• The centriole lie within the:
  
  (a) Karyosome
  (b) Centrosome
  (c) Chromosome
  (d) Nucleosome
  
  
• The universal donor blood group is:
  
  (a) A
  (b) B
  (c) AB
  (d) O
  
  
• Recombinant DNA is introduced into the host cell by means of:
  
  (a) Fungus
  (b) Bacterium
  (c) Vector
  (d) Virus
  
  
• An essay on the Principle of Population was published by:
  
  (a) Sutton
  (b) Lyell
  (c) Malthus
  (d) Darwin
  
  
• All living organisms of the planet earth are collectively called:
  
  (a) Biosphere
  (b) Lithosphere
  (c) Hydrosphere
  (d) Atomosphere 
  
  
• Earth surface is occupied by the marine water ecosystem:
  
  (a) 70%
  (b) 75%
  (c) 80%
  (d) 85%
  
  
• An unusual type of pollution is:
  
  (a) Water pollution
  (b) Soil pollution
  (c) Noise pollution
  (d) Radiation Pollution

Time: 2:40 Hours
(Subjective Part)
Marks: 68
SECTION-I

2. Write short answer any Eight Parts. 16

• Explain anyhdrobiosis with an example.
• What is the role of aldosterone and antidiuretic hormones in kidney?
• What are heat-shock proteins?
• Briefly explain hematoma formation.
• Define aerofoils.
• Differentiate between ligament and tendon.
• Define resting membrane potential.
• What are neurotransmitters?
• What do you know about parasympathetic nervous system?
• Explain briefly vernalization.
• What are functions of sertoli cells?
• Name the hormones secreted by placenta.

3. Write short answer any Eight Parts. 16

• Give difference between genotype and phenotype.
• Give the significance of test cross.
• Define probability.
• Define neodarwanism.
• How endangered species are distinct from extinct species?
• Name any four factors affecting gent frequency.
• How community is different from population?
• Differentiate between hydrosere and xerosere?
• What is commensalism?
• Explain about industrial effluents.
• Define pollution and pollutants.
• Give any four points to conserve energy.

4. Write short answer any Six Parts. 12

• What are practical applications of apical dominance?
• Define teratology and teratogenes.
• Define conservative and semi conservative replication of DNA.
• Define sense and antisense strands.
• Define point mutation. Give an example.
• What changes in cell take place during diplotene?
• Define DNA finger printing.
• Define alpine and Boreal forests.
• What do you know about prairies?

SECTION-II

Question#5
(a) Nervous system of planaria is better developed than hydra. Discuss. 4
(b) Describe Nitrogen cycle. (No need of diagram). 4

Question#6
(a) Elaborate the child birth in humans. 4
(b) Describe the various factors affecting gene frequency. 4

Question#7
(a) Write down the structure of nephron. 4
(b) Give the details of prophase-I of meiosis. 4

Question#8
(a) Explain sliding filament model of muscle contraction. 4
(b) How did Hershey and Chase demonstrate that DNA is hereditary material? 4

Question#9
(a) Discuss genetics of color - blindness. 4
(b) Explain population explosion with its causes and on sequences. 4