RAWALPINDI BOARD
BIOLOGY
(Session: 2015)
(Group-I/A-2015)
INTER (Part-II)
New Scheme
Time: 15 Minutes
(OBJECTIVE)
Marks: 17
Note:- Four possible answers A,B,C and D each question are giver. The choice which you think is correct, fill that circle in front of that circle in front of that question with Marker or Pen ink. Cutting or filling two or more circle will result in ZERO mark in that question.

• Bivalents or Tetrads are formed in:
  
  (A) Zygotene
  (B)
  (C)
  (D)
  
  
• Mongolism is also known as:
  
  (A) Down’s syndrome
  (B)
  (C)
  (D)
  
  
• The sequence of nucliotides that determines the aminoacid sequence of a protein in called:
  
  (A) Gene
  (B)
  (C)
  (D)
  
  
• In which development stage, germs layers are formed:
  
  (A) Gastrulation
  (B)
  (C)
  (D)
  
  
• External fertilization occurs in:
  
  (A) Aquatic environment
  (B) 
  (C)
  (D)
  
  
• Reproduction is very important to the survival of :
  
  (A) Species
  (B)
  (C)
  (D)
  
  
• Which of the harmone suppresses ovulation:
  
  (A) Progesteron
  (B)
  (C)
  (D)
  
  
• Which of the following is a renewable resource:
  
  (A) Land
  (B) 
  (C)
  (D)
  
  
• Which of the biomes has been increased in area by human activities:
  
  (A) Desert
  (B)
  (C)
  (D)
  
  
• The plants that have adaptation of small and thick leaves to reduce water loss are called:
  
  (A) Xerephytes
  (B)
  (C)
  (D)
  
  
• The xcretory product that require mini mum water for its elimination is:
  
  (A) Uric Acid
  (B)
  (C)
  (D)
  
  
• Muscle fatigue is caused by:
  
  (A) Lactic acid
  (B) 
  (C) 
  (D)
  
  
• Which of the following animal has hydrostatic skeleton:
  
  (A) Sea anemone
  (B)
  (C)
  (D)
  
  
• Chances of genetic recombination are minimized due to:
  
  (A) Gene linkage
  (B) 
  (C)
  (D)
  
  
• Which of the enzymes act as molecular scissors:
  
  (A) Restriction Endonucleases
  (B)
  (C)
  (D)
  
  
• Who published an essay on “The principle of population”
  
  (A) Malthus
  (B)
  (C)
  (D)
  
  
• Study of single population’s relationship to environment is called:
  
  (A) Autecology
  (B)
  (C)
  (D)

RAWALPINDI BOARD
BIOLOGY
(Session: 2015)
(Group-I/A-2015)
INTER (Part-II)
New Scheme
Time: 2:45 Hours
(SUBJECTIVE)
Marks:88
SECTION-I

Q-2. Write short answers. (any eight) 16

• What is peritioneal dialysis? Explain.
• Briefly describe urea cycle?
• Write a note on kidney transplantation?
• How does Tendon differ from Ligament?
• Differentiate between sap wood and heart wood?
• What are disadvantages of Exoskeleton?
• How Cytokinesis occurs in plants?
• Differentiate between apical and lateral meristems?
• What do you know by turner’s Syndrokme?
• What events occur in anaphase of mitosis?
• What is Neo-Darwinism?
• Differentiate between Endangered and Threatened species?      

Q-3. Write short answers. (any eight) 16

• What are Biological rhythms?
• Define nerrotransmitters and give examples?
• What is midbrain’s retieular formation?
• How process of child birth is initated in human?
• Define Gestation period and after birth?
• What is Oestrous cycle?
• What are restriction endonucleases?
• What are Plasmids? Give their role?
• What is industrial effluent? Give its impact?
• Name three deserts of Pakistan and their location?
• Differentiate between aquatic & terrestrial ecoststem?
• Discriminate between normal health and diseases?

Q-4.Write short answers. (any six) 12

• Define Niche?
• Differentiate between Enchromatin & Heterochromatin?
• Write contribution of Rosalin Franklin?
• What are Polygenic Traits? Give two examples in humans?
• Differentiate between Linkage and crossing over?
• Differentiate between a Food chain and a Food web?
• What would be the sex of a Drosophila and a Human with XXY chromosomes?
• What is difference between Biotic and Abiotic components? Give examples of Abiobic components.
• Give various types of chromosomes depending upon location of centromere?

Answer and three questions. 24

5.(a) Explain pleiotropy with the help of examples? 
(b) What is aging? How will you explain this process?

6.(a) What are the functions of placenta during pregnancy?
(b) How did meselson and Stahi show that DNA replication is semiconservative?

7.(a) Differentiate between Sclerenchyma cells and collenchymas cells and sketch their diagrams?
(b) Describe factors affecting gene frequency?

8.(a) Define osoregulation and describe osoergulation in plants?
(b) Describe the water and Land as renewable resources?

9.(a) Describe role and commercial application of Auxins?
(b) Define succession?Explain different stages of xerosere.

Section-III
(Practical)

Answers any three parts. 15

• 10.(a) Sketch and Label the male reproductive system of frog?
• (b) Make the labeled diagram of urostyle of frog?
• (c) Write down the procedure to study mitosis in onion root tips. Draw the metaphase and telophase stage?
• (d) Draw and label the structure of hen’s egg?

10.e) Write down short answers. 5

• how much energy ispassed from one trophic level to other trophic level?
• What is difference between positive and negative phototropism?
• Define muscle twice?
• Give Position of Nervous system in Cockroach?
• Give behavior of Ehrcromosome during metaphase?