Federal Board
HSSC-II 2014
BIOLOGY
SECTION — A
(Marks 17)
Time allowed:2 Minutes
Marks: 17
NOTE: Section-A is compulsory. 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 allowed. Do not use lead pencil.Circle the correct option i.e. A / B / C/.D. Each part carries one mark.

Question#1

• Rectal glands are present in
  
  (a) fish
  (b) Cartilaginous fish
  (c) Hag fish
  (d) Freshwater fish
  
  
• _________are mature bone cells.
  
  (a) Stem cell
  (b) Osteoblast
  (c) Osteoclast
  (d) Osteocyte
  
  
• Addison's disease is because of
  
  (a) Hypo-function of Adrenal Cortex
  (b) Hyper-function of Adrenal Cortex
  (c) Hypo-function of Adrenaline
  (d) Hyper-function of Adrenaline
  
  
• Diploid parthenogenesis occurs in______.
  
  (a) Aphids
  (b) Honey Bee
  (c) Wasps
  (d) Ants
  
  
• _________is the study of aging.
  
  (a) Anthropology
  (b) Ornithology
  (c) Gerontology
  (d) Demography
  
  
• Okazaki fragments are about______long in prokaryotes.
  
  (a) 100-200 nucleotides
  (b) 100-300 nucleotides
  (c) 1000-2000 nucleotides
  (d) 1000-3000 nucleotides
  
  
• Chromosome number is doubled during_____.
  
  (a) G_o Phase
  (b) G₁ Phase
  (c) S-Phase
  (d) G₂ Phase
  
  
• How many gene pairs contribute to the wheat grain colour?
  
  (a) One
  (b) Two
  (c) Three
  (d) Four
  
  
• PSc 101 has antibiotic resistance gene for______.
  
  (a) Tetracycline
  (b) Ampicillin
  (c) Both A and B
  (d) Insulin
  
  
• Which of the following is incorrectly matched?
  
  (a) Protoplast - Plant cell engineering
  (b) RFLPS - DNA finger printing
  (c) polymerase - PCR
  (d) DNA. ligase - Mapping human chromosomes
  
  
• In Ecuador, forest coverage has been reduced by______
  
  (a) 95%
  (b) 85%
  (c) 45%
  (d) 65% 
  
  
• Rabbit is an example of trophic level.
  
  (a) T1
  (b) T2
  (c) T3
  (d) T4
  
  
• Average rain fall in temperate dedciduous forest is_____.
  
  (a) 750 -1500 mm
  (b) 600 -1200 mm
  (c) 800-1000 mm
  (d) 750 - 900 mm
  
  
• Which of the following continents has the highest rate of human population?
  
  (a) Australia
  (b) Africa
  (c) Asia
  (d) North America
  
  
• A thickness of actin molecule is
  
  (a) 16 nm
  (b) 7-8 nm
  (c) 2 nm
  (d) 6-7 nm
  
  
• The embryo of chick is termed as neurula at_______.
  
  (a) 24 hours
  (b) 18 hours
  (c) 21 hours
  (d) 28 hours
  
  
• ________ of brain controls water balance.
  
  (a) Thalamus
  (b) Amygdala
  (c) Medulla
  (d) Hypothalamus

BIOLOGY HCCS-II
Time Allowed: 2:35 Hours
Total Marks Section B and C: 68
Note: Answer any fourteen parts from Section B and any two questions from section C on the separately provided answer book. Use supplementary answer sheet i-e Sheet B if required write your answer neatly and legibly.
SECTION-B
(Marks-42)

2. Answer any FOURTEEN parts. The answer to each part should not exceed 3 to 4 lines. (14x3=42)

• What is Pyrexia?
• Describe different types of regulations of heat exchange between animals and environment.
• Write any three major functions of the skeletal system.
• Differentiate between Active and passive flight.
• Draw a labeled diagram to show communication across synapse.
• What do you know about Habituation?
• How are identical twins different from fraternal twins?
• Write briefly about any two sexually transmitted diseases.
• What is the effect of light on growth of plants?
• What is the concept of differentiation?
• What are two important features of DNA polymerase III?
• Describe three types of RNA.
• What is the difference between metaphase of mitosis and metaphase-I of meiosis-I?
• What is Test Cross?
• How is gene therapy helpful to cure SCID?
• Describe two main points of Drawin’s Theory.
• Differentiate between Autecology’s and Synecology.
• What are the major adaptations of Terrestrial ecosystem?
• Write the cause of each of following diseases:
  (a) Kwashirokor
  (b) Alzheimer
  (c) Hemophilia

SECTION-C
(MARKS-26)

Note: Attempt any TWO questions. All questions carry equal marks. (2x13=26)
Question#3
(a) Explain Patterns of sex determination in different animals. (09)
(b) Describe the phenomenon of Plieotropy. (04)

Question#4
(a) How did Meselson and Stahi show that DNA replication is semi-conservative? (09)
(b) Describe how RNA polymerase carry out the process of transcription. (04)

Question#5
(a) Describe sliding filament model? What does it explain? (05)
(b) Describe the role of hormones during excretion. (04)
(c) Describe the functions of different parts of human forebrain. (04)