FAISALABAD 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

• Grey equatorial cytoplasm gives rise to:
  
  (a) Chord and neural tube
  (b) Muscle cells and guts
  (c) Skeleton and muscles
  (d) Gut and neural tube
  
  
• This condition appears as a result of point mutation:
  
  (a) Down syndrome
  (b) Turner syndrome
  (c) Klinefelter syndrome
  (d) Sickle cell anemia
  
  
• The tumor which is localized and not transferred to other body parts:
  
  (a) Malignant
  (b) Benign
  (c) Apoptosis
  (d) Necrosis
  
  
• Pairing of homologous chromosomes for tetrad formation starts at:
  
  (a) Zygotene
  (b) Leptotene
  (c) Pachytene
  (d) Diplotene
  
  
• Bombay phenotype is an example of:
  
  (a) Pleiotropy
  (b) Dominance
  (c) Probability
  (d) Epistasis
  
  
• Genome fragments can be separated according to their lengths during the process:
  
  (a) Catalphoresis
  (b) PCR
  (c) Cloning
  (d) Gel electrophoresis
  
  
• Flagella may have arisen through the ingestion of prokaryotes similar to spiral shaped bacteria called:
  
  (a) E-coli
  (b) Streptococcus
  (c) Spirochete
  (d) Rhizobium
  
  
• When bacteria in soil oxidize ammonia or ammonium ions, this is called:
  
  (a) Oxidation
  (b) Denitrification
  (c) Ammonification
  (d) Nitrification
  
  
• In temperate grassland the rate of primary production is about:
  
  (a) 700-1400 g/m2
  (b) 700-1600 g/m2
  (c) 700-1800 g/m2
  (d) 700-1500 g/m2
  
  
• Some detergents contain a lot of:
  
  (a) Sulphur
  (b) Carbon
  (c) Phosphate
  (d) Carbonates
  
  
• Animals that do not require to adjust their internal osmotic state actively are known as:
  
  (a) Osmoregulators
  (b) Osmoconformers
  (c) Terrestrials
  (d) Hypertonic
  
  
• One gram of ammonia nitrogen requires how much water for excretion?
  
  (a) 300 Ha'
  (b) 400 int
  (c) 500 ni
  (d) 600 m€
  
  
• Sciatica is characterized by stabbing pain radiating over the  course of:
  
  (a) Sciatic artery
  (b) Sciatic nerve
  (c) Sciatic vein
  (d) Sciatic capillary

• The number of cervical vertebrae are:
  
  (a) 7
  (b) 12
  (c) 33
  (d) 22
  
  
• The structures which respond are called:
  
  (a) Effectors
  (b) Nerves
  (c) Receptors
  (d) Sense organs
  
  
• During delivery of baby, average loss of maternal blood is:
  
  (a) 350 cm
  (b) 350 cm2
  (c) 350 cm3
  (d) 350 fat

Time 3.10 Hours
Subjective Part
Marks: 83
Section –I

2.Attempt any Eight short questions.

• What is flame cell? Why it is called so?
• What difference between protonephridium and metanephridium.
• What is lithotripsy?
• Differeniate between heartwood and seapwood?
• Write chemical composition of exoskeleton in Mollusca and arthropeda?
• Name two paired facial bones?
• What is meristem? Write function of lateral meristem.
• Name two layers of lateral plate of mesoderm.
• Define cell cycle. Name its two phases.
• What is metastasis? Give two properties of cancer cells.
• What are endangered species? Give one component of their conservation plan.
• What are vestigial organs? Write names of any two in human.

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

• What are commercial applications of abscisic acid?
• What is sodium potassium pump?
• What are neurotransmitters? Give an example.
• Differentiate between identical and fraternal twins.
• Differentiate between spermatogenesis and oogenesis.
• How seedless fruits are formed?
• What is recombinant DNA technology?
• What is polymerase chain reaction?
• Differentiate between Prairies and Savana.
• Which type of life is present in profundal zone of a fresh water lake?
• What is ozone layer and its advantage?
• How the trees act as environmental buffers?

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

• Define central dogma and name its two steps?
• tine chromosomal aberrations.
• Ski tell to show phosphodiester bond.
• Dern product rule and pseudoautosomal genes.
• A man is 45 years old and bald. His wife also has pattern baldness.
• What is the risk that their son will lose his hair?
• Define multiple alleles.
• Sketch food chain to show various trophic levels.
• Name three levels of integration in community.
• Differeniate between predation and parasitism.

SECTION-I1

Attempt any TIIREE questions. (8 x 3 = 24)
Question#5
(a) Describe the role of liver as an excretory organ.
(b) Explain the green house effect.

Question#6
(a) Discuss sliding filament model of muscle contraction.
(b) Write note on Hardy-Weinberg theorem.

Question#7
(a) What is a synapse? How a nerve impulse transmits through synaptic cleft?
(b) What is food web? How it is constructed to show various trophic levels?

Question#8
(a) Explain the process of cloning. Give its advantages and disadvantages.
(b) Describe different types of RNA with their roles.

Question#9
(a) What is aging? How will you explain this process?
(b) Define erythroblastosis foetalis. Explain maternal - foetal Rh-incompatibility.

SECTION III:

Question#10
Attempt any three questions.
(a) Draw a labelled sketch of nervous system of c ockroach.
(b)Sketch and label hindlimb of Frog's skeleton.
(c)Write procedure to demonstrate phototropis m. Give observations and results.
(d)Write procedure to estimate water contents in soil. Also write observations and calculations.
(e) Write the short answers:

• Define heliotropism.
• Give identification of smooth muscles.
• Define tropism.
• What is meant by cytokinesis?
• What is meant by heterozygous genotype?