Gujranwala Board (2015)
Biology Part-I
Note: Four possible answers A, B,C and D to each questions are given. The choice which you think is correct, fill that circle in the front of that question with marker or pen ink. Cutting or filling two or more circle will result in zero mark in that question. Write the letter A, B, C or D in the column (Write the correct option) against the each question also. If there is contradiction in the bubble and hand written answer, bubble option will be considered correct.

• If non protein part is loosely attached to protein, it is known as:
  
  a) cofactor
  b) Coenzyme
  c) holoenzyme 
  d) active side
  
  
• Bactrophage replicates only in _____ cell.
  
  a) Animal
  b) Plant
  c) Bacterial
  d) fungal
  
  
• An- outer flexible covering of ciliates is:
  
  a) cell wall
  b) pellicle
  c) sheath
  d) cuticle
  
  
• tracheophyta is further sub divided into:
  
  a) 2 sub- divisions
  b) 3 sub- divisions
  c) 4 sub- divisions
  d) 7 sub- divisions
  
  
• The larva found in echinoderms is:
  
  a) trochoplore
  b) veliger
  c) bipinnaria
  d) planaria
  
  
• Quantitative study of energy relationship in biological syatem is called:
  
  a) Bioenergetics
  b) biosynthesis
  c) biodegradation
  d) biotechnology
  
  
• tiny thin-walled ducts called parabronchi are present in the lungs of:
  
  a) mammals
  b) amphibians
  c) birds
  d) reptiles
  
  
• The ions involved in the opening and closings of stomata are:
  
  a) Sodium
  b) calcium
  c) Potassium
  d) Magnesium
  
  
• The study of distribution of animals in nature is called:
  
  a) Zoo Geography
  b) Biodiversity
  c) geography
  d) wild life
  
  
• Human tissues have 85% water in cells of:
  
  a) Brain
  b) bone
  c) blood
  d) liver
  
  
• Cell wall secreted by:
  
  a) Protoplasm
  b) nuceloplasm
  c) golgicomplex
  d) Ribosome
  
  
• Which is an aerobic bacterium?
  
  a) E.coli
  b) Spirchete
  c) Campylobacter
  d) pseudomonas
  
  
• The plasma protein constitutes percent by weight of plasma:
  
  a) 7-9%
  b) 9-11%
  c) 11-13%
  d) 13-15%
  
  
• Aquatic arthropods respire through:
  
  a) lungs
  b) skin
  c) gills
  d) spiracles
  
  
• in root modules, bacteria convert nitrogen into:
  
  a) Ammonia
  b) nitrate
  c) urea
  d) nitrite
  
  
• Plastocyanin protein contains:
  
  a) iron
  b) copper
  c) magnesium
  d) potassium
  
  
• lovastatin is used for lowering blood:
  
  a) pressure
  b) glucose
  c) cholesterol
  d) uric acid

Note: Section I is compulsory,
Attempt any 3 questions from section II and any 3 part from section III:
SECTION –I

2:- Write short answers of any 8 questions:

• How does theory differ from law?
• Differentiate between chemotherapy and radiotherapy?
• What is biochemistry? give its importance.
• Differentiate between Apoenzyme and holoenzyme.
• What are enzyme inhibitors? give their major types.
• Differentiate between coenzyme and prosthetics group.
• Write down symptoms and preventions of hepatitis.
• What are the mesosomes? Write their role.
• What are the lichens? give their importance.
• What are the toad stools? give example.
• Differentiate between microphylls and megaphylls.
• What are essential and non- essential parts of flower?

3:- Write short answer of any 8 questions:

• Define storage diseases. Give at least their two examples.
• Write any two important functions of centriole.
• What are the apicomplexans?
• Explain red tides.
• What is chlorella? Give its significance.
• Give functions of micronucleus and macronucleus of ciliate.
• Define Photosynthesis. Give its summary equation.
• Give any two difference between photosynthesis and respiration.
• Mention any two commercial uses of sponges.
• What are metamorphosis.
• Write names and uses of any two useful insects.
• Give names and hams of any two harmful molluscs.

4- Write the short answers of any 6 questions:

• Give two functions of human liver.
• What prevents the wall of stomach from being digested?
• Give biological classification of corn.
• Differentiate between organismic and cellular respiration.
• Why O2 can be obtained more easily from air than from water?
• What is the difference between cutaneous and pulmonary respiration?
• What is the role of “Surfactant” in respiratory distress syndrome?
• Describe briefly the “symplast Pathway” .
• Differentiate between single circuit and double circuit heart with examples.

SECTION-II

Q5.(a) What is cloning? Discuss in detail.

(b) Discuss taxonomic status of fungi.

Q6.(a) What are the plastids? Explain structure and function of chloroplast.

(b) What is glycolysis? Sketch its various steps only(No Description)

Q7.(a) Draw and label infection cycle of HIV.

(b) Write down a note on Anorexia nervosa.

Q8.(a) Give the biological importance of water.

(b) Enlist the steps involved in evolution of seed. Describe any two in detail.

Q9.(a) Describe different classes of bacteria on the basis of flagella.

(b) Explain different functions of human blood.

SECTION -----III (Practical)

Q.10 (a) Describe biuret test for confirmation of proteins.

ii- (a) What are the globular proteins?

(b) i:- You are provided with the flower of rosaindica. describe in technical terms its following parts:

i- calyx ii- Gynaecuym iii- androecium

ii:- Difference between actinomorphic and zygomorphic flower.

(c) Sketch and label the digestive system of frog.

(d) i- Write down the procedure for the investigation of effect of temperature on the activity of enzyme(pepsin).

ii- What is optimum temperature for enzymatic activity?

(e) Identify the following speciments you have observed in the laboratory.

write down one reason of identification for each.

• Paramecium
• Amoeba
• S monocot stem
• Fern Prothallus
• Female cone of penus