RAWALPINDI BOARD 2012
BIOLOGY PART-I
Time: 20 Min.
(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.

• The microscopic study of tissues is called.

(a) Histology
(b) Microbiology
(c) Bacteriology
(d) Virology

• The specific heat of vaporization of H₂O is:

(a) 374
(b) 474
(c) 574
(d) 674

• Lock and key model was proposed by:

(a) Koshland
(b) Fisher
(c) Flemming
(d) Watson

• The resolution of electron microscope ranges between:

(a) 2-6 pm
(b) 2.4 Angstrom
(c) 3-6 Angstrom
(d) 3.9 mm

• Herpes virus is responsible for Herpes:

(a) Simplex
(b) Duplex
(c) Triplex
(d) Quadruple

• Primary function of flagella is to help in:

(a) Walking
(b) Motality
(c) Running
(d) Rest

• Agricus are:

(a) Poisonous fungi
(b) Edible
(c) Pathogenic fungi
(d) Paracitic fungi

• Example of Apicomplesans is:

(a) Plasmodium
(b) Amoeba
(c) Stentor
(d) Trypanosoma

• Scientific name of shisham is:

(a) Capsicum annum
(b) Dalbergia sisso
(c) Cassia fistula
(d) Zeamays

• Double fertilization is a special process found in:

(a) Ferns
(b) Bryophytes
(c) Gymnosperms
(d) Angiosperms

• Mammals have evolved from reptilian ancestor known as:

(a) Dinosaurs
(b) Varanope
(c) Cotylosaurs
(d) Ichthyosaus

• The only photosynthesizing cells of epidermis of leaf are:

(a) Cortex cells
(b) Mesopyll
(c) Guard cells
(d) Xylem cells

• The valves present in the veins are:

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

• The entry of CO₂ into the leaves depends upon the opening of:

(a) Guard cells
(b) Ilydathodes
(c) Stomata
(d) Pores

• Elimination of undigested matter by an animal is called:

(a) Ingestion
(b) Excretion
(c) Absorption
(d) Digestion

• Blood is not involved in transport of gases in:

(a) Frog
(b) Cockroach
(c) Earthworm
(d) man

• Lungs are covered with double membranous sac called as:

(a) Pleura
(b) Pericardium
(c) Scrotum
(d) Diaphragm

Time: 2:40 Hours
(Subjective Part)
Marks: 68
SECTION-I

2. Write short answer any Eight Parts.

• What is gene therapy?
  
• How marine biology differs from fresh water biology?
• What is the importance of ATP?
  
• What is NAD?
  
• What is mycelium?
  
• Name sexual and asesxsual spores of ascomycetes.
• What is protonema?
  
• What is circinate venation?
  
• What is the importance of heterospory?
  
• Differentiate between ingestion and egestion.
  
• What is the commonest cause of food poisoning.
  
• Waht is botulism?

3. Write short answer any Eight Parts.

• Define congenital diseases. Give examples.
  
• Differentiate between passive and active transport.
• Write down Biological classification of Corn.
  
• What is Binormial nomenclature? Who devised the system?
  
• What are plasmids? Give their significance.
  
• What are super Blue Green Algae? Give its importance.
  
• Why air is best respiratory medium than water?
  
• Differentiate between composition of inhaled and exhaled air.
  
• State Pressure flow theory. Who proposed it first?
  
• Differentiate between pulmonary and systemic circulation.
  
• Define bleeding in plants. Give its causes.
  
• Differentiate between plasmolysis and deplasmolysis.

4. Write short answer any Six Parts. 12

• Define competitive and non-competitive inhibitors.
  
• Justify that Euglenolds are close to zooflagellates.
  
• Differentiate Pseudocoelomate and coelomate.
  
• Name parasitic amoeba. What disease does it cause?
• What are tunicates?
  
• Write a note on useful insects.
  
• Define absorption spectrum and action spectrum.
• What is photosystem?
  
• Differentiate photophosphorylation and oxidativephosphorylation.

SECTION-II 

5.(a) Write down any two factors affecting the ENZYME -ACTION. 04
(b) Write down respiratory system of Birds. 04

6.(a) What are the characteristics of Enzymes? 04
(b) What is ecological imprtance of fungi? 04

7.(a) Differentiate between prokaryotic and enkaryotic cell. 04
(b)Describe any two hypotheses about opening and closing of stomata. 04

8. Explain process of digestion and absorption in small intestine of man. 04

9. Explain the proces of glycolysis. 04