SAHIWAL BOARD 2013
PAPER BIOLOGY PART-I
Time: 20 Min.
(Objective Part)
Marks: 17
Note: You have four choice for each objective type question as A, B, Cand D. The choice which you think is correct; fill that circle in front of that question number. Use marker or per to fill the circles. Cutting or filling two or more circles will result in zero mark in that question.

• A cube of eight cocci is termed as :
  
  (a) Tetrad
  (b) Sarcina
  (c) Diplococcus 
  (d) Streptococcus
  
  
• Test of actinopods is made of
  
  (a) Calcium 
  (b) Calcium phosphate 
  (c) Silica
  (d) Chitin
  
  
• The group of Fungi in which sexual reproduction has not been observed is:
  
  (a) Zygotnycota
  (b) Basidiomycota
  (c) Ascomycota
  (d) Deuteromycota
  
  
• The double fertilization is the characteristic feature of:
  
  (a) Angiospermo 
  (b) Gymnosperms 
  (c) Bryophytes
  (d) Ferns
  
  
• The pore by which the water leaves the body of sponges is called:
  
  (a) Ostia
  (b) Mouth 
  (c) Anus 
  (d) Osculum
  
  
• Excretory organs present in annelids are :
  
  (a) flame cells
  (b) Nephridia
  (c) Malpigain tublues 
  (d) Kidneys
  
  
• Photosynthetic pigments in plants are organized into clusters, called:
  
  (a) Photoperiods
  (b) Photolysis
  (c) Pholosystems
  (d) Photo phosphorylation
  
  
• The casparian strips are present in:
  
  (a) Cortex cells of roots
  (b) Endodermis cells of root
  (c) Cells of pericycle 
  (d) Cells of phloem
  
  
• Which of the following is fluid feeder?
  
  (a) Aphid 
  (b) Earthworm 
  (c) Sheep 
  (d) Man
  
  
• How much the air spaces comprise of the total volume of the leaf:
  
  (a) 20% 
  (b) 30% 
  (c) 40% 
  (d) 50%
  
  
• The type of white blood cells which destroys small particles by phagocytosis is:
  
  (a) Eosinophil
  (b) Basophil
  (c) Monocyte 
  (4) Neutrophil
  
  
• Formula of lactic acid is :
  
  (a) C₃H₄0₃
  (b) C₃H₅O₃
  (e) C₃H₆O₃
  (d) C₂H₅OH
  
  
• Monosacchrides which are rare in nature and occur in some bacteria
  
  (a) Trioses 
  (b) Tetroses
  (c) Pentoses 
  (d) Hexoses
  
  
• Tentative explanation of observations is called as:
  
  (a) Theory 
  (b) Reasoning 
  (c) Dedcution 
  (d) Hypothesis
  
  
• Infoldings of inner membrane of mitochondria are:
  
  (a) Cisternae 
  (b) Cristae
  (c) Thylakoids 
  (d) Granum
  
  
• Optimum pH for enzyme pepsin is:
  
  (a) 2 
  (b) 6.80 
  (c) 7
  (d) 9
  
  
• The genus name of corn plant is.
  
  (a) Pisum 
  (b) Solanum 
  (c) Mays 
  (d) Zea

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

2. Attempt any EIGHT short questions. (8x2= 16)

• What is the biological control of pests?
• What are endangered species?
• What is the heat of vaporization of water?
• Define holoenzyme.
• What is active site of an enzyme?
• Who proposed induce fit model of enzyme action?
• Define subkingdom parazoa of animal kingdom.
• What is medusae found in coelentrates?
• What is madreporite? Give its function .
• What is swim bladder of fishes? Give it's one function .
• What is Guttation ?
• What are blue babies ?

3. Attempt any EIGHT short questions. (8x2 = 16)

• Differentiate between streptococci and staphulococci.
• Write example of a parasitic apicomplixan. Give symptoms of malaria.
• Give importance of algae. (2 points only)
• Name two plants like protists groups.
• What is red tide?
• Define double fertilization.
• Differentiate between nutrient and nutrition.
• What is photosystem-1?
• Define chemiosmosis.
• Differentiate between hemospory and heterospory.
• How adipose tissue is formed?
• What are fluid feeders?

4. Attempt any SIX short questions. (6x2 = 12)

• Write a note on chromoplasts.
• Give the functions of Mitochondria.
• Write note on Polio.
• Discuss the importance of yeast.
• Discuss Sexual reproduction in Rhizopus.
• Write down the respiration in Hydra.
• What is the role of diaphragm in inspiration and expiration in man?
• Write a note on Tuberclosis.
• What products are produced during photorespiration?

SECTION III

Attempt any THREE questions. (8x3 = 24)
Question#1
(a) Describe protection and conservation of environment.
(b) Narrate the economic losses due to fungi (Animal diseases only)

Question#2
(a) Write down the characteristics of monosaccharides and oligosaccharides.
(b) Sketch and describe Glycolysis.

Question#3
(a) Write a the process of digestion in Amoeba.
(b) Write a detailed note on plastids.

Question#4
(a) Explain growth and reproduction in Bacteria
(b) Explain alternation of generation with its significance in biyophyla.

Question#5
(a) Describe lifecycle of bacteriophages .
(b) Write down six functions of blood.

SECTION IV

10. Attempt any THREE questions. (5x3 = 15)
(A)(i) You are provided with egg albumin and Millon's reagent. Write Biochemical test for substance with egg albumin contains. 3
(ii) Name the food stuffus which are rich source of protein (four names). 2
(B)(i) You are 1 provided the flower lathyrus odoratus (Sweet Pea). Describe the following parts of flowers in technical terms: 3
Calyx Corolla Androecium
(ii) Differentiate between complete and incomplete flower. 2
(C) Draw and labe diagram of digestive system of cockroach. 5
(D)(i) Write the procedure to measure the factor (wind) affecting the rate of transpiration by the Ganon 's potometer. 3
(ii) What effect of temperature on the rate of transpiration? 2
(E) Following specimens / slides were studied in the laboratory, Give one character of each to identify 5
(i) Ulva 
(ii) Gametophyte of Funaria 
(iii) Euglena 
(iv) Female cone of pinus 
(v) Paramecium