SAHIWAL BOARD 2014
PAPER BIOLOGY PART-I
Time: 20 M.
(Objective Part)
Marks: 17
Note; Four answer are given against each question in columns A, B,C and D. Select the right answer and on the separate Answer Sheet, fill the circle A,B,C or D with pen or marker in front of that question number.

Question#1

• The ions involved in the opening and closings of stomata are:
  
  (a) Sodium
  (b) Calcium
  (c) Potassium
  (d) Magnesium
  
  
• Attraction between water molecules which hold the water in xylem tissue is called:
  
  (a) Tension
  (b) Cohesion
  (c) Imbibition
  (d) Adhesion
  
  
• Gaseous exchange occour in frog through lungs is called:
  
  (a) Cutaneous respiration
  (b) Photo respiration
  (c) Pulmonary respiration
  (d) Cellular respiration
  
  
• If bile pigments are prevented from leaving digestive tract causing a condition called:
  
  (a) Piles
  (b) Obesity
  (c) Jaundice
  (d) Ulcer
  
  
• Energy released by breaking of terminal phosphate of ATP is:
  
  (a) 8.3 K cal
  (b) 7.3 K cal
  (c) 6.3 K cal
  (d) 9.3 K cal
  
  
• Most abundant protein on earth is:
  
  (a) Rubisco
  (b) Haemoglobin
  (c) Albumen
  (d) Fibrinogin
  
  
• The animals that only exist in polyp form is:
  
  (a) Obelia
  (b) Jelly fish
  (c) Physalia
  (d) Hydra
  
  
• In annelids excretion takes place by specialized structures called:
  
  (a) Kidneys
  (b) Malpighian tubules
  (c) Flame cells
  (d) Nephridia
  
  
• Lovastatin is used for:
  
  (a) Lowering of blood cholesterol level
  (b) Organ transplant
  (c) Inhibit fungal growth
  (d) Headache
  
  
• Which one of the following belongs to group musci bryopsida,
  
  (a) Polytrichum
  (b) Anthoceros
  (c) Marchantia
  (d) Porella
  
  
• Which chemical is mainly deposited in the shells of diatoms.
  
  (a) Calcium
  (b) Pectin
  (c) Silica
  (d) Lignin
  
  
• Bacteria which can live in presence or absence of oxygen is called:
  
  (a) Facultative
  (b) Aerobic
  (c) Anaerobic
  (d) Microaerophilic
  
  
• Mumps and Measles is caused by virus belong to group.
  
  (a) Parvovirus
  (b) Paraniyxovirus
  (c) Myxovirus
  (d) Polio
  
  
• Tay-Sach's disease is because of absence of an enzyme that is involved in the catabolism of:
  
  (a) Lipids
  (b) Poly saccharide
  (c) Proteins
  (d) Oligo saccharide
  
  
• Optimum pH for pancreatic lipase is:
  
  (a) 8.00
  (b) 7.00
  (c) 9.00
  (d) 6.00
  
  
• Amount of solar energy required to synthesize the 10gm of glucose during photosynthesis is:
  
  (a) 717.6 K cal
  (b) 817.6 K cal
  (c) 716.6 K cal
  (d) 816.6 K cal
  
  
• In human body, amount of phosphorus is:
  
  (a) 1 %
  (b) 2%
  (c) 18%
  (d) 22%

Time: 3:10 Hour
(Subjective Part)
MARKS: 83
Section I

2. Attempt any EIGHT short questions. (812=16)

• Differentiate between deductive and inductive reasoning.
• Define the term phyletic lineage.
• Write the general phyletic lineage.
• How does high temperature affect an enzyme activity?
• What do you know about induce fit model?
• Differentiate between coenzymes and prosthetic group.
• Write the importance of sponges (any two)
• Differentiate between polyp and medusae.
• Give the importance of earthworm.
• What is metamorphosis? (xi) Give the role of platelets.
• Differentiate between open and closed circulatory system.

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

• Write down two differences between cell walls of gram positive and gram negative bacteria.
• Write down two differences between slime mold and fungi.
• Write down functions of micronuclei and macronuclei in ciliates.
• Write down four similarities between green algae and plants.
• What is the importance of algae?
• Define double fertilization.
• Write down botanical names of sweet pea and peanut.
• Write down molecular formula of chlorophyll a and chlorophyll b.
• Define compensation point
• Write down effects of nitrogen and potassium deficiency on plant growth.
• Write down ingredients of saliva.
• Write down cause and symptoms of botulism,

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

• What is cell fractionation?
• Differentiate microtubules and microfilaments.
• Define binomial nomenclature.
• What is nuclear mitosis?
• Describe parasexuality. (vi) Define photorespiration.
• Name properties of respiratory surfaces in animals.
• Differentiate between cutaneous and pulmonary respiration.
• What is respiratory distress syndrome?

SECTION-II

Attempt any THREE questions. (8x3-24)

Question#5
(a) Describe various methods of Asexual reproduction in Fungi. 4
(b) Describe "Preventive measures" and "Vaccination"as the methods of disease control. 4

Question#6
(a) Write a note on phospholipids. 4
(b) Write a note on Evolution of leaf. 4

Question#7
(a) Give a comparison of prokaryotic and eukaryotic cells. 4
(b) Describe the role of CO, in photosynthesis. 4

Question#8
(a) Discuss mineral nutrition in plants. Give their deficiency symptoms. 4
(b) Define cloning. Discuss different mechanisms of cloning. 4

Question#9
(a) How arteries are different from veins? 4
(b) Explain about Nutrition of Bacteria. 4

(SECTION-III)

Attempt any THREE questions. (5x3=15)
Question#10
(a) (i) You are provided with millon's reagent and egg albumen.
Write biochemical test for the substance egg contains. 3
(ii) Define proteins. Give two functions of proteins. 2
(b)(i) You are given the flower solanum nigrum. Describe the technical terms of its following parts: 3
(i) Calyx
(ii) Gynoecium
(iii) Androecium
(ii) What is superior ovary? 2
(c) Sketch and label the diagram of respiratory system of frog. 5
(d)(i)You are provided with sphygmomanometer. Write down procedure for measurement of blood pressure at rest and after exercise. 3
(ii) Differentiate between systolic and diastolic blood pressure. 2
(e) You are provided following specimen. Give one character of each to identify. 5
(i)Euglena
(ii) Volvox
(iii) Entamoeba
(iv) T.S. of dicot stem.
(v) Adiantum (Gametophyte)