Federal Board
HSSC-I 2014
BIOLOGY HSSC-I
(Revised Syllabus)
SECTION — A
(Marks 17)
Time allowed: 25 Minutes
NOTE: Section-A is compulsopi. All parts of this section are to be answered on the question paper itself. It should be completed in the first 25 minutes and handed over to the Centre Superintendent. Deleting/overwriting is not allowe(d) Do not use lead pencil.Qi. Circle the correct option i.e. A/B/C/(d) Each part carries one mark.

Question#1

• When a tissue is injured the damaged cells release chemical alarm signals as
  
  (a) Heparin
  (b) Histamine
  (c) Pyrogen
  (d) Antigen
  
  
• In intermediate filaments the basic protein subunit of the filament is
  
  (a) Flagellin
  (b) Vimentin
  (c) Tubulin
  (d) Myosin
  
  
• _____is a detached intravascular soild, liquid or gaseous mass that is carried to a site di:tant from its point of origin.
  
  (a) Thrombus
  (b) Embolus
  (c) Plaque
  (d) Cholesterol
  
  
• The steroid wedged into the bilayer, helps stabilize the phospholipids at a body temperature but helps keep the membrane fluid at lower temperature.
  
  (a) Progesterone
  (b) Estrogen
  (c) Cholesterol
  (d) Testosterone
  
  
• Among the five types of epithelial cells in stomach cells secrete protective mucus.
  
  (a) Goblet
  (b) Parietal
  (c) Zymogen
  (d) Endocrine
  
  
• Glucose and Fructose are structural
  
  (a) Polymers
  (b) Isomers
  (c) Dimers
  (d) Monomers
  
  
• _______ is involved in cell wall, membrane permeability, enzyme activation in plants.
  
  (a) Calcium
  (b) Magnesium
  (c) Sulphur
  (d) Potassium
  
  
• protein is involved blood clotting mechanism.
  
  (a) Collagen
  (b) Elastin
  (c) Thrombin
  (d) Myoglobin
  
  
• The larval forms of echinoderm are referred to as
  
  (a) Bipinharia
  (b) Trocophore
  (c) Radiolaria
  (d) None of these
  
  
• The detachable co-factor is known as _______ if it is an inorganic ion.
  
  (a) Activator
  (b) Cofactor
  (c) Prosthetic group
  (d) Coenzyme
  
  
• Regeneration is exhibited by sponges, some cnidarians, annelids and
  
  (a) Arthropods
  (b) Molluscs
  (c) Nematodes
  (d) Echinoderms
  
  
• The most widespread and important carotene is carotene, which is familiar as orange pigment of carrot.
  
  (a) Alpha
  (b) Beta
  (c) Eata
  (d) Delta
  
  
• Spores are formed in the Sporophyte by meiosis, thus the spores are haploi(d) The spores germinate into alga like structures called in bryophytes.
  
  (a) Paraphysis
  (b) Protonema
  (c) Plasmodium
  (d) Protoplasm
  
  
• In peroxisomes glycolate is converted to during photorespiration.
  
  (a) Glycine
  (b) Serine
  (c) Valine
  (d) Alanine
  
  
• _____are protozoans which possess shell.
  
  (a) Foraminiferans
  (b) Apicomplexans
  (c) Trypanosoma
  (d) Stentor , Aotm COM
  
  
• Polio can be prevented by the killed vaccine.
  
  (a) Sabin
  (b) Salk
  (c) Alpha interferon
  (d) None of these
  
  
• Introduced the term bacterium, derived from Greek word bacterion-a, meaning small stuff.
  
  (a) Leeuwenhoek
  (b) Ehrenberg
  (c) Carl Woese
  (d) Pasteur

BIOLOGY HSSC-I
(Revised Syllabus)
SECTION - B
(Marks 42)

2.  Answer any FOURTEEN parts. The answer to each part should not exceed 3 to 4 lines. (14 x 3 = 42)

• How do interferons inhibit viral activity? 03
• What is the mechanism of movement of cilia? 03
• What are Stereoisomers? Explain briefly by giving example of glucose. 03
• Compare the chemical composition of Nucleoplasm with that of Cytoplasm. 03
• What are the uses of Electrocardiogram? 03
• Name a few chemicals produced in the body which act as vasodilators and vasoconstrictors. 03
• How are Chylomicrons formed in digestive system and what is their fate? 03
• Name a few proteins which have protective function, also list their role in the body. 03
• Who proposed the starch - sugar hypothesis and how it explains stomatal opening and closing? 03
• What is prosthetic group in an enzyme?Give example. 03
• What are the different pathways taken by plants for movement of sap? 03
• What are three functions of Carotenoids? 03
• In what ways does class insecta differ from other members of animal kingdom?
• Why viroids are considered separately from viruses? What diseases are caused by them? 03
• Define the terms and give examples of each: 03
  (a) Acoelomate
  (b) Coelomate
  (c) Pseudocoelomate

• How would you differentiate between cell walls of Gram-positive and Gram-negative bacteria? 03
• State the steps that lead to the evolution of see(d) 03
• What are the Pathogenic roles of fungi? 03
• What is meant by circinate vernation and which group of plants exhibit it? 03

SECTION - C
(Marks 26)

Note: Attempt any TWO questions. All questions carry equal marks. (2 x 13 = 26)
Question#3
(a) What is the conducting system of heart? 08
(b) How do plants adapt to cope wilh low and high temperatures? 05

Question#4
(a) What are the general characteristics of Super class Agnatha? 05
(b) Describe the land adaptations shown by Bryophytes. 08

Question#5
(a) Describe the steps involved in Kreb's cycle. Give schematic representation. 09
(b) Write a note on conjugated molecules. 04