RAWALPINDI BOARD 2013
BIOLOGY
PART-1
Time: 20 Mins
(Objective Part)
Marks: 17
Note: You have four choice 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 nil the circles. Cutting or filling two or more circles will result in zero mark in that question.

• A tetrad is square of

(a) 2 cocci  
(b 4 cocci
(c) 6 cocci
(d) 8 cocci

• Tests of foraminifera are made of

(a) Iron
(b) Calcium
(c) Silica
(d) Spongin

• Fungi can tolerate a wide range of pH from

(a) 2-9
(b) 3-10
(c) 441
(d) 1-13

• The simplest of all bryophytes are

(a) Mosses
(b) Hornworts
(c) Liverworts
(d) Whisk ferns

• Which of the following is placenta mammal:

(a) Platypus
(b) Bat
(c) Kangroo
(d) Opossum

• The carotenes are mostly red to:

(a) Blue
(b) Yellow
(c) Orange
(d) Green

• In cockoroach food is temporarily strred in:

(a) Rectum
(b) Gizard
(c) Crop
(d) Colon

• A liter of water contains ml of oxygen :

(a) 10
(b) 20
(c) 30
(d) 40

• The valves present in the veins are called:

(a) Bicuspid
(b) Tricuspid
(c) Semilunar
(d) Aortic

• One complete heart beat consists of one systole which lasts for about

(a) 0.2 seconds
(b) 0.8 seconds
(c) 0.5 seconds
(d) 1.0 seconds

• The first action spectrum was obtained by T.W. Engelemann in:

(a) 1983 A.D
(b) 1883 A.D
(c) 1783 A.D
(d) 1683 A.D

• Pseudocoelom is present in:

(a) Coelenterates
(b) Flat worms
(c) Round worms
d) Segmentes worms

• The study of distribution of animals in nature is called:

(a) Ecology
(b) Geography
(c) Wild life
(d) Zoogeography

• Our blood normally contains glucose:

(a) 0.6 %
(b) 0.8%
(c) 0.06%
(d) 0.08%

• The optimum pH of pepsin is :

(a) 2.00
(b) 4.00
(c) 6.00
(d) 8.00

• Cell membrane has 60-80%:

(a) Lipids
(b) Proteins
(c) Carbohydrates
(d) Vitamins

• The capsomers present in the capsid of adenovirus are

(a) 100
(b) 200
(c) 252
(d) 352

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

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

• Describe briefy hydroponic culture technique.
  
• Define biological control with an example
  
• Write down general formula of an amino-acid.
  
• Define inhibitor with an example.
  
• Differentiate between ostia and osculum .
  
• Define polymorphism.
  
• Describe briefly about hook worm.
  
• Write down two affinities of echinodermata with hemichordata.
  
• Define pressure flow theory.  
  
• Define systemic circulation in man.
  
• Write down the effect of high temperature on an enzyme.
• At high substrate level, rate of enzyme reaction is not increased. Give reason.

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

• Write down two characteristics of dinoflagellates.
  
• What is anorexia nervosa?
  
• Enlist botanical names of two genra offamily Solanaceae. Define photosynthesis .
  
• Give our ocamples of Gymnosperms given in your book.
  
• Write down two bentfits of algae.
  
• Define  action Spectrum.
  
• Enlist characteristic processes.
  
• Give two differences between the cell walls of gram postive and gram negative bacteria.
  
• Why algae are considered ancestral arganism of green land plants?
  
• Enlist enzymes secreted by Pancrease anf give their functions.
  
• Write down two differences between Fungus like protists and Funggi.

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

• Differentiate between phagocytosis and pinocytosis.
  
• What is meant by Cytosoi and Polysomes?
  
• Difftrentiate between Capsid and Capsomeres.
  
• What is Histoplasmosis?
  
• What is meant by Plasmogamy and Karyogamy?
  
• Enlsit the properties of respiratory surfaces in animals.
  
• What is Diaphragm?
  
• What is the meant by Inspiration an Expiration ?
  
• Write down three important factors, which affect the capacity of haemoglobin to combine with oxygen.

Attempt any THREE questions. (8 x 3 24)

5. (a) Describe the biological organization at population and community level.
(b) Write down four economic gains due to fugi.

6. (a) Differentiate between Fibrous and globular Proteins.
(b) Write a note on non-cyclic Phosphotylation with diagram.

7. (a) Explain disgestion in the oral cavity of man.
(b) Describe structure and functions of plasma membrane.

8. (a) What are Cyanobiacteria ? Disscuss in detail Nostoc.
(b) Draw labelled diagram of life cycle of angiospermic plants and explain process of double fertilization.

9. (a) Write a note on Retroviruses.
(b) Explain Leucaemia and Thalassemia.

Attempt any THREE questions. (5x3=35)

10. (a) You are provided with bendict solution and an unknown solution .Write down the biochemical test for the substance which the unknown solution contains.
Name two reducing sugars.

(b) You are provided with a flower lathyrus odoratus . Describe the technical terms of following parts.

• Calyx
  
• Carolla
  
• Gynoecium

Differentiate Zygomorphic and actinomorphic flower.

(c) Sketch and label the diagram of respiratory system of Frog.

(d)Write down the procedure to measure the effect of different factors, e, g., temperature, effecting rate of transpiration using potometer.
Enlist two factors which decrease the rate transpiration.

(e) Give one character of each to identify, the following speciemens.

• Volvaxcolony
  
• Female Marchantia
  
• Yeast
  
• Paramecium
  
• T.S of Monocot stem