SAHIWAL BOARD 2016
PAPER BIOLOGY
PART-I
Time: 20 Min. (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 fill the circles. Cutting or filling two or more circles will result in zero mark in that question.

Question#1

• Brush-like arrangement of its conidia is characteristic of:
  
  (a) Rhizopus
  (b) Penicillium
  (c) Ustilago
  (d) Agaricus
  
  
• The sexual process is exhibited by most ciliates by:
  
  (a) Binary fission
  (b) Budding
  (c) Conjugation
  (d) Fertilization
  
  
• Which one of following is not found in all bacteria?
  
  (a) Cell membrane
  (b) Ribosome
  (c) Nucleoid
  (d) Capsule
  
  
• The common name of Allium cepa is:
  
  (a) Onion
  (b) Tomato
  (c) Amaltas
  (d) Potato
  
  
• The fluid which surrounds the thylakoids is called:
  
  (a) Matrix
  (b) Stroma
  (c) Cytoplasm
  (d) Nucleoplasm
  
  
• The optimum pH of Enterokinase is:
  
  (a) 1.50
  (b) 3.50
  (c) 5.50
  (d) 7.50
  
  
• Which one of following is not a Lipid?
  
  (a) Rubber
  (b) Chitin
  (c) Cutin
  (d) Cholestrol
  
  
• The tentative explanation of observation is called:
  
  (a) Hypothesis
  (b) Deduction
  (c) Theory
  (d) Law
  
  
• Blood platelets are fragments of large cell called:
  
  (a) Leucocyte
  (b) Megakaryocyte
  (c) Erythrocyte
  (d) Granulocyte
  
  
• The plasma proteins constitute % by weight:
  
  (a) 9-11%
  (b) 11-12 %
  (c) 13-15 %
  (d) 7-9%
• Lungs are covered with double membrane sacs called:
  (a) Pleura
  (b) Scrotum
  (c) Pericardium
  (d) Diaphragm
  
  
• Dipeptides are broken down into amino acid by:
  
  (a) Erypsin
  (b) Pepsin
  (c) Trypsin
  (d) Lipase
  
  
• The amount of glucose converted into ATP during anaerobic respiration is:
  
  (a) 4%
  (b) 3%
  (c) 2%
  (d) 1%
  
  
• Magnesium of chlorophyll is replaced hemoglobin by:
  
  (a) Calcium
  (b) Phosphorous
  (c) Potassium
  (d) Iron
  
  
• Excretory organ in Annelida are:
  
  (a) Nephridia
  (b) Flame cell
  (c) Nephron
  (d) Malpighian tubule
  
  
• Metamerically segmentation are found in phylum.
  
  (a) Annelida
  (b) Porifera
  (c) Protozoa
  (d) Nematoda
  
  
• Horsetail belongs to subdivision.
  
  (a) Lycopsida
  (b) Psilopsida
  (c) Sphenopsida
  (d) Pteropsida

(Subjective Part)
 Section I

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

• Differentiate the micromolecules and macromolecules.
• Define ecology and histology.
• What is NAD?
• Define apoenzyme and co-factor.
• Give the optimum pH values of enzyme pepsin and pancreatic lipase.
• How many regions are present in active site?
• From where do giant amoebas get energy?
• What are choanoflagellates?
• Name the nuclei of ciliates.
• Name the causal organisms of Irish potato.
• How do the fungi resemble animals?
• What is histoplasmosis?

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

• Give chemical composition of primary and secondary cell wall.
• Why mitochondrion is called self replicating organelle?
• Give two basic features of chordates.
• What is polymorphism?
• What is mantle?
• Give two differences between diploblastic and triploblastic animals.
• What is a photosystem? Name its two parts or components.
• What is alcoholic fermentation?
• Give composition of inhaled and exhaled (breathed) air.
• What is respiratory distress syndrome?
• Give one difference between alveoli and parabronchi.
• What is pleura?

4. Attempt any SIX short questions. (6 x 2 =12)

• What are capsomeres and what is their number is adenovirus?
• What are plasmids?
• Define phylogenetic system of classification.
• Differentiate between microphyll and megaphyll leaves.
• What is appendicitis?
• What are gastric glands?
• Tubular digestive system in more efficient than sac like. Give reason.
• Define immunity.
• What is single circuit heart?

SECTION-II

Attempt any THREE questions:
Question#5
(a) Write a note on phyletic lineage.
(b) Describe the significance of alternation of generation.

Question#6
(a) Describe fibrous and globular proteins.
(b) Give an account of digestion in cockroach.

Question#7
(a) Describe the structure and function of plasma membrane.
(b) Give the different modes of nutrition in fungi.

Question#8
(a) Describe various steps of lytic cycle of phage virus.(Bacteriophage).
(b) Describe water as important reactant of photosynthesis.

Question#9
(a) Write a comprehensive note on nutrition of bacteria.
(b) Write a note on functions of blood.