SARGODHA BOARD 2016
PAPER BIOLOGY
PART-II
Time: 20 Min.
(Objective Part)
Marks: 17
Note: You have four choice for each objective type question as A, B, C and D. The choice which you think is correct; fill that circle in front of that question number. Use marker or pen to fill the circles. Cutting or filling two or more circles will result in zero mark in that question.

Question#1

• The homeostatic thermostat in man is:
  
  (a) Thalamus
  (b) Cerebrum
  (c) Medulla
  (d) Hypothalamus

• Chemicals that cause fever and are produced from blood cells are:
  
  (a) Bilirubin
  (b) Interferons
  (c) Pyrogens
  (d) Antibodies

• Which bone provides attachement site for muscles.
  
  (a) Compact bone
  (b) Spongy bone
  (c) Soft bone
  (d) Cartilage

• Which one is not a joint disease.
  
  (a) Arthritis
  (b) Disc slip
  (c) Spondy losis
  (d) Sciatica

• Vehicle for transport of male gamete in land plants is.
  
  (a) Water
  (b) Pollen grain
  (c) Wind
  (d) Pollen tube

• Reproduction is necessary for the survival of.
  
  (a) Species
  (b) Individual
  (c) Population
  (d) Community

• Which of the following behaves like normal cells.
  
  (a) Benign tumor
  (b) Malignant tumor
  (c) Cancer
  (d) Gall
  
  
• What are the significant happenings of meiosis?
  
  (a) Crossing over
  (b) Random assortment of chromosomes
  (c) Linkage
  (d) Crossing over and random assortment of chromosomes

• Resting membrane potential of a neuron is.
  
  (a) - 50 mV
  (b) - 60 mV
  (c) - 70 mV
  (d) - 80 mV

• Primary growth in plants is caused by:
  
  (a) Apical meristem
  (b) Lateral meristem
  (c) Intercalary meristem
  (d) Rib meristem

• Chromosomes appear inside the nucleus at the time of:
  
  (a) Cell division
  (b) Cell elongation
  (c) Cell maturation
  (d) Cell differentiation

• Mendelian factors were renamed as genes by:
  
  (a) Mendel
  (b) Correns
  (c) Johannsen
  (d) Morgan
  
  
• Antithrombin III is a biotechnological product produced in:
  
  (a) Sheep
  (b) Goat
  (c) Mice
  (d) Cow
  
  
• Which of the following is vestigial organ of whale.
  
  (a) Pelvis
  (b) Leg bones
  (c) Lungs
  (d) Pelvis and leg bones
  
  
• If population of predator increases then population of prey.
  
  (a) Increases
  (b) Decreases
  (c) May increase or decrease
  (d) Has no effect

• In aquatic ecosystem, near shore zone is called:
  
  (a) Littoral zone
  (b) Limnetic zone
  (c) Profundal zone
  (d) Benthic zone
  
  
• Population of Pakistan in the year 1947 was.
  
  (a) 32.5 million
  (b) 50 million
  (c) 150 million
  (d) 180 million

Time:3:10 hours
Subjective
Marks:83
Section I

2. Attempt any EIGHT short questions. (8 x 2 = 16)

• What are xerophytes?
• Differentiate between osmoconformers and osmoregulators.
• What is glomerular filtrate?
• Define turgor pressure.
• Differentiate between sapwood and heartwood.
• What are phototactic movements?
• What are meristems?
• Define photoperiodism.
• What is mitotic appratus?
• Define corssing over.
• What is gene pool?
• Define Mutation.

3. Attempt any EIGHT short questions. (8 x 2 = 16)

• What are etiolation and chlorosis?
• What are effectors? Give examples.
• Name various structure that protect our brain.
• Briefly describe phenomenan of Apomixes.
• Define terms menstruation and menopause.
• What are test tube babies?
• What are three possible ways to get gene of intrest for gene cloning?
• How can genetic library be searched for a certain gene?
• Define weather and climate.
• What are plankton? Give their two types.
• Give some ways by which we can save energy.
• Define pollution. Name its four types.

4. Attempt any SIX short questions. (6 x 2 =12)

• Differentiate heterochromatin and euchromatin.
• What are Okazaki fragments?
• Differentiate between transcription and translation.
• State "Law of Independent Assortment".
• Define test cross.
• What are sex limited traits?
• Differentiate between food chain and food web?
• What are lichens?
• Define ammonification.

SECTION-II

Attempt any THREE questions. (8x 3 =24)
Question#5
(a) Explain excretion in cockroach with diagram.
(b) Write a note on wild life.

Question#6
(a) Explain briefly "Human's Appendicular Skeleton".
(b) Define Evolution.Explain comparative Embryology as evidence in the favour of Evolution.

Question#7
(a) What are neurons? Give their types and functions?
(b) Disucss nitrogen cycle in an ecosystem?

Question#8
(a) Write brief note on photoperiodism.
(b) Explain Experiment of Beadle and Tatum on Neurospora.

Question#9
(a) Write a note on embryonic induction.
(b) Describe the genetics of colour blindness.

SECTION-111

Attempt any TIIREE questions. (5x3=15)
(a)Sketch and label the nervous system of cockroach.
(b)Sketch and label hind limb of frog.
(c)Explain the procedure and observations to study geotropism in plants.
(d)Investigate the water contents of soil samples.
(e)Write the short answer of the following questions.

• What is quadrat?
• Define community.
• Define synapsis.
• Give name of an aquatic plant.
• Whal is the function of atlas.