Inter (Part - II) Gujranwala Board 20122
Biology Paper: II (Objective)
Time: 20 Minutes Marks: 17
Note:
You have four choices 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 with marker or pen on the answer book provided. Cutting of filling two or more circles will result in zero mark in that question. Attempt as many questions as given in objective type question paper and leave others blank. Write the letter A, B,C or D in the column (write correct option)against each question. If there is a contradiction in the bubble and hand written answer. Bubble option will be considered correct.

• Which light favours elongation of cells?
  
  (A) Blue
  (B) ultraviolet
  (C) Violet
  (D) red
  
  
• Nociceptors produce the sensation of:
  
  (A) Touch
  (B) warmth
  (C) Pressure
  (D)pain
  
  
• Stone monuments like ‘Taj Mahal’ are being eroded due to ‘stone cancer’ by:
  
  (A)acid rain
  (B)green house effect
  (C)eutrophication
  (D)radiation
  
  
• Armadillo, the armored mammals live only in:
  
  (A)Europe
  (B)America
  (C)Australia
  (D)Asia
  
  
• The blood serum containing antibodies is called:
  
  (A)antigen
  (B)immunoglobulin
  (C)plasma
  (D)antiserum
  
  
• Cramp is also known as:
  
  (A)tetany
  (B)titanic contraction
  (C)tetanus
  (D)muscle fatigue
  
  
• Uric acid is produced from:
  
  (A)amino acid
  (B)nucleic acid
  (C)fatty acid
  (D)protein
  
  
• In Sindh, the desert ecosystem is called:
  
  (A)Thal
  (B)sahara
  (C)Thar
  (D)Colistan
  
  
• Commonly used restriction enzyme is:
  
  (A)Plasmid
  (B)pSC 101
  (C)pBR 322
  (D)Eco R 1
  
  
• Retiles and birds are:
  
  (A)viviparous
  (B)oviparous
  (C)ovoviviparous
  (D)marsupial
  
  
• Vaspressin (anti-diuretic hormone) and oxytocin are:
  
  (A)proteins
  (B)amino acids and derivatives
  (C)polypeptides
  (D)steroids
  
  
• An increase in plant growth due to the activity of vascular cambium is called:
  
  (A)primary growth
  (B)open growth
  (C)secondary growth
  (D)tertiary growth
  
  
• The structural and functional relationship between nutritive and excretory system exists in:
  
  (A) Planaria
  (B) earthworm
  (C) Cnidarians
  (D) insects
  
  
• A change in the community structure of Ana ecosystem over a period of time is:
  
  (A) Niche
  (B) unstable ecosystem
  (C) Succession
  (D) pioneer
  
  
• The atosomal non-disjunction is man in which 21^st pair of chromosomes fails to segregate, resulting in gamete with 24 chromosomes is called:
  
  (A)Down’s syndrome
  (B)Turner’s syndrome
  (C)Klinfelter’s syndrome
  (D)Jacob’s syndrome
  
  
• In nature, P 730 to P 660 conversion occurs in the:
  
  (A) Day
  (B) red light
  (C) Dark
  (D) dawn
  
  
• Every 200 nucleotides, the DNA duplex are coiled around a core of eight histone proteins forming a complex known as:
  
  (A) Polysome
  (B) heterochromatin
  (C) Nucleosome
  (D) euchromatin

Inter (Part - II) Gujranwala Board 2012
Biology Paper: II (Subjective)
Time: 2.40 Hours Marks: 68
SUBJECTIVE
Note: Section I is compulsory. Attempt any three (3) questions from Section II.
(SECTION-I)

2.Write Short answers to any EIGHT questions: (2x8=16)

• Differentiate between ectotherms and endotherms.
• What is hemodialysis?
• What are osmoregulatore?
• What is dermatome formation?
• What is herniation of disc?
• What is the difference between tetanus and muscular tetany?
• Explain effectors with an example?
• What are the functions of parathyroid glands?
• Discuss the role of two hormones produced by gut.
• What are phytochromes?
• What is the difference between Oogensis and spermatogenesis in humans?
• Name the synthetic auxin used as selective week killer.

3.Write Short answers to any EIGHT questions: (2x8=16)

• Define Mendel’s law of independent assortment.
• Differentiate between phenotype and genotype.
• What is MODY? Write its causes?
• Name any four species, declared extinct in Pakistan.
• Explain briefly endosymbiont hypothesis?
• Differentiate between homologus and analogus organs?
• Define autecologies with the help of an example.
• What are lichens and mycorrhizae?
• Write about decomposers?
• Mention any four ways in which we can save energy.
• Give the importance of ozone layer.
• Describe briefly renewable and non-renewable resources.

4.Write Short answers to any SIX questions: (2x6=12)

• What is growth? Mention its types.
• Differentiate between area pellucida and area opaca.
• Mention the types of chromosomes due to centromeric position.
• Why is Erwin Chargaff famous for?
• What is transcription bubble? How is it formed?
• Define cell cycle. Draw a eukaryotic cell cycle.
• Elaborate molecular carriers. Give examples.
• What are phyto planktons? Give examples.
• Define temperate deciduous forest. Mention various such forests in Pakistan.

(SECTION-II)
Question#5
a) Give a detailed amount of synapse. 4
b) Explain ‘Nitrogen Cycle’.(No need of Diagram) 4

Question#6
a) Discuss the effect of quality of light of Photoperiodism. 4
b) Describe Hardy-Weinberg Theorem. 4

Question#7
a) Explain osmoregulation in marine animals.
b) Write a note on cancer. 4

Question#8
a) Give an account of structure of skeletal muscle. 4
b) Write a note on mutation. 4

Question#9
a) Write a note on co dominance with an example. 4
b) Describe ‘Ozone Layer Depletion 4