RAWALPINDI BOARD 2013
BIOLOGY
PART-II
Time: 20 Mini
(Objective Part)
Marks: I 7
Note: You have four choice for each objective type question as A,B,C and A 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.

• Which part of the body serves as excretophere?

(a) Root
(b) Stem
(c) Leaves
(d) Flowers

• Non-surgical removal of kidney stone is called:

(a) Dialysis
(b) Kidney transplant
(c) Uremia
(d) Lithotripsy

• Cardiac muscles are the muscles of the:

(a) Liver
(b) Heart
(c) Stomach
(d) Kidney

• Which is not unguligrade?

(a) Bear
(b) Deer
(c) Goat
(d) Horse

• Antidiuretic  harmone is also called:

(a) Oxytocin
(b) ACTH
(c) Vasopressin
(d) Prolactin

• 2,4 D broad leaved:

(a) Monocots
(b) Dicots
(c) Fems
(d) Gymnosperms

• Oviduct is generally called as:

(a) Fallopian tube
(b) Uterine tube
(c) Both A & B
(d)Uterus

• Fruit ripening is often accompanied by a burst of respiratory activity, called the:

(a) Fertilization
(b)Photoperiod
(c)Climactric
(d) Reproduction

• The hypoblast is mainly presumptive:

(a) Endoderm
(b) Mesoderm
(c) Ectoderm
(d) Blastoderm

• The number of chromosomes in frog is:

(a) 6
(b) 26
(c) 40
(d) 46

• The pairing of homologous chromosomes is completed in:

(a) Lepotene
(b) Zygotene
(c) Pachytene
(d) Diplotene

• Diabetics are unable to metabolize blood:

(a) Urea
(b) Protein
(c) Fat
(d) Sugar

• A commonly used restriction enzyme is:

(a) EcoR₁
(b) EcoR₂
(c) EcoR₃
(d) EcoR₄

• The change in frequency of alleles at a locus that occurs chance is:

(a) Gene pool
(b) Mutation
(c) Migration
(d) Genetic drift

• Charles Eton defined the niche as the species's:

(a) Occupation
(b) Job
(c) Work
(d) Development

• In Sindh, the desert ecosystem is called:

(a) Thai
(b) Thar
(c) Sahara
(d) Ghobi

• Ozone molecule is made up by building of three atoms of:

(a) Nitrogen
(b) Hydrogen
(c) Oxygen
(d) Carbon

Time: 3:10 Hours
(Subjective Part)
Marks: 83
Section II

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

• What are macronutrients? Give at least four examples.
  
• Give two examples of symbiotic organisms.
  
• Define Neo-Darwinism.
  
• What is the effect of undersecretion of vasopressim?
  
• What is muscle fatigue? Give its causes.
  
• What are ectotherms? Give two examples.
  
• Write down the composition of thin filament of myofibril.
  
• Give the function of ligament and tendons.
  
• Define analogous orgns and give an example.
  
• Define  Anhydrobiosis.
  
• Write down thermoregulatory mechanisms in bats and dogs.
  
• How blood pressure is synergistically affected by adrenaline and Non-adrenaline?

3. Attempt any EIGHT shore questions. (8 x 2= 1 6)

• Define cloning. What are its advantages?
  
• What are test tube baby?
  
• Give some common control of AIDS.
  
• What is growth correlation?
  
• Give some symptoms of aging.
  
• Define meristem, Name its typo based on position.
• What are Okazaki fragment?
  
• What is RNA polymerase? Give its role in transcription.
  
• How climate differs from weather?
  
• Write down three ways or energy conservation.
  
• Give four main importances of forest.
  
• Name some adaptations in plants for terrestrial ecosystem.

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

• What is G-1 phase? What does happen in this phase?
  
• What is probe? How is it traced?
  
• Describe the causes of cancer briefly.
  
• Define Codominance and give.an example.
  
• What is epistasis? Differentiate it from dominance.
  
• Define  molecular scissors. How are they obtained? 
  
• What is equatorial plate? How is it formed in mitosis?
  
• How can you trace a murderer, who assaulted a women on a deserted place?
  
• Differentiate, between dominent and recessive traits with examples.

Attempt any THREE questions. (8 x 3 = 24)

5. (a) Describe osmoregulation in marine animals.
(b) How did Hershley and Chase prove experimentally that DNA is hereditary material?

6. (a) Describe briefly Exoskeleton in Arthopods along with Moulting.
(b) Compare Mitosis with meiosis, and describe the importance of Mitosis.

7. (a) Explain the Instinctive behavior with examples.
(b) How sex is determined in various groups in plants?

8. (a) Describe female reproductive cycle.
(b) State the causes and effects of Green House effects.

9. (a) Give an account of Tundra Ecosystem.
(b) What is growth'? Discuss different phases of Growth in plants.