BIOLOGY
PART –II
MULTAN BOARD
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. Use marker or pen to all the circles. Cutting or filling two or more circles will result in You mark in that question. Attempt as man) questions as given in objective type question paper and lease others blank. No credit is ill be awarded in case BUBBLES are not filled. Do not solve question on this sheet of OBJECTIVE PAPER.

Question#1

• Trimethylarnine Oxide is produced in -
  
  (A) Hag fish
  (B) Bony fish
  (C) Marine fish
  (D) Cartilaginous fish
  
  
• The tolerance of dehydration is:-
  
  (A) Osmocon fomicrs
  (B) Osmoregulators
  (C) Anhydrobiosis
  (D) Dehydration
  
  
• The loss of water due to ex-osmosis from plant cells causes plant to:-
  
  (A) Turgid
  (B) Swell
  (C) Will
  (D) Rupture
  
  
• The sleep movements of plants fall under the category of:-
  
  (A) Growth
  (B) Tropic
  (C) Turgor
  (D) Tropic
  
  
• _______are indole acetic acid or its varients.
  
  (A) Auxins
  (B) Gibberellins
  (C) Cytokinins
  (D) Ethene
  
  
• Ovulation is induced by:-
  
  (A) FSH
  (B) L.H
  (C) Estrogen
  (D) Progesterone
  
  
• From beginning of the third month of pregnancy, the human embryo is related to as the.-
  
  (A) Foetus
  (B) Placenta
  (C) Neonate
  (D) Young one
  
  
• The pigment free area that appears at the time of fertilization is called:-
  
  (A) Embryo
  (B) Yolk
  (C) Gray crescent
  (D) White cytoplasm
  
  
• Chromosomal part which uncoils during inter phase is called:-
  
  (A) Euchromatin
  (B) Hecterochromatin
  (C) Chromatids
  (D) Satellite DNA
  
  
• Unequal separation of chromosomes is called:-
  
  (A) Disjunction
  (B) Separation
  (C) Non-disjunction
  (D) Metastasis
  
  
• Nerve cells and eye lens cells remain in stage for life time.
  
  (A) G₁
  (B) G₂
  (C) G_o
  (D) S
  
  
• ______is the form of appearance of a trait.
  
  (A) Genotype
  (B) Phenotype
  (C) Pleiotropy
  (D) Epistasis
  
  
• Persons with Huntington's disease have a unique site where a restriction enzyme cuts:-
  
  (A) DNA
  (B) RNA
  (C) Lipids
  (D) Proteins
  
  
• Ozone in the upper layer of atmosphere that filters:.
  
  (A) IR radiation
  (B) UV radiation
  (C) Q radiation
  (D) r -radiation
  
  
• Herbaceous stage in xerosere is the:-
  
  (A) First stage
  (B) Third stage
  (C) Fourth stage
  (D) Last stage
  
  
• A little light is left to power photosynthesis at the depth of:-
  
  (A) 500 feet
  (B) 600 feet
  (C) 1000 feet
  (D) 1200 feet
  
  
• CFCs are produced by:
  
  (A) Moving carts
  (B) Industrial machines
  (C) Air conditioners and refrigerators
  (D) Aeroplanes

2016(A)
(MULTAN)
SECTION-I

2. Attempt any EIGHT part.

• Draw metabolic pathways in urea cycle
• Whet are Juxuencelullary Negations? One Oar untatnance
• Write structured athpletioos fer seriatim of heat exchange between animals and environment.
• Differentiate between Fibers and Sclerides.
• Define Tactic Movements. Give its one type
• What is Osteoporosis? Write its imminent.
• What is Apical Dominance? Give its cause.
• Differentiate between Primary Organizer and Primary Induction.
• Differentiate between Karyokinesis and Cytokinesis.
• Write symptoms of Turner’s Syndrome.
• What is meant by Genetic drift?
• Define Endangered Species. How they are different from Threatened Species?

3. Attempt say EIGHT parts.

• What are Biological Rhythms?
• Write Commercial application of Cytokinins.
• Define Receptors.
• Define Fruit.
• What is Parthenogenesie?
• Define Fraternal Twins.
• What is Gnome?
• Define Bioreactors.
• Differentiate between Coniferous Alpine and Boreal Forests.
• Define Desertification.
• What are Renewable Resources?
• Define Wild Life.

4. Attempt any SIX parts.

• Differentiate between Hektochromatin and Euchromatin.
• Draw formula of Cytosine
• What is Chromosomal theory of Inheritance?
• What is incomplete Dominance?
• What is XO - XX mechanism of sex determination?
• What is Haemophilia? Name its types.
• What are Biotic components of an ecosystem?
• What is Mycorrhiza?
• Differentiate between Micronutrients and Macronutrients.

(SECTION-II)

NOTE: - Attempt any THREE questions
Question#5
(a) Write note on Fossil Fuels.
(b) Discuss Kidney problems and cures.

Question#6
(a) What are Joints? Describe their different types.
(b) Describe comparative anatomy as an evidence of evolution.

Question#7
(a) Describe four different types of leaning behavior.
(b) Write note ea Grazing,

Question#8
(a) Explain human female reproductive system.
(b) Give Meadson-Stahl experiment to thaw that replication of DNA is semi-conservative.

Question#9
(a) Write a note on Regeneration.
(b) Discuss sex-linkage in humans with one example

SECTION-III
(PRACTICAL)

10. Attempt any three parts
(A) Sketch and label the urino-genital system of male frog.
(B) Draw the labelled diagram of hind limb of frog.
(C) Write down the procedure to demonstrate the phenomenon of phototropism. Also mite down the observations
(D) Mile the procedure to investigate the components of aquatic food web. 
(E) Answer the following Questions briefly:
(i) Define food chain.
(ii) Give the name of single bone of upper arm.
(iii) Define food chain.
(iv) What is the function of α-cells in pancreas.
(v) Hat is Phototropism?
(vi) What is the status of fungi in ecosystem.