Federal Board HSSC-I (2015)
BIOLOGY HSSC-I
Part -1
Time allowed: 25 Minutes
(Marks 17)
SECTION-A
NOTE: - Section-A is compulsory and comprises pages 1-2. 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.
Q1. Circle the correct option i.e. A / B / C /D. Each part carries one mark.

• Out of 92 naturally occurring chemical elements, how many are commonly used in forming the chemical compounds from which living organisms are made?

A. 12 
B. 16
C. 14
D. 10

• How much glucose does our blood normally contain?

A. 0.08%
B. 0.8%
C. 8.0% 
D. 1.08%

• RNAs are synthesized by DNA in a process known as:

A. Translation  
B.  Transcription
C.  Transformation
D.  Reverse transcription

• The optimum temperature for enzymes of human body is:

A.32°C  
B.46°C
C.37°C  
D.35°C

• The site which is responsible for breakdown of fatty acids to succinate is called:

A. Lysosomes
B. Peroxisomes
C.Goigibodies
D.Gly6xysomes

• Which is a phase of rapid growth in which bacteria divide at exponential rate?

A.Lag phase
B.Decline phase
C. Log phase
D.Stationary phase

• The disease, African sleeping sickness in human is caused by:

A Plasmodium
B.Forams
C.Entamoeba
D.Trypanosoma

• Aspergillus belongs to phylum:

A.Zygomycota
B. Ascomycota
C.Deuteromycota
D.Basidiomycota

• The only living genera of Psilopsida is:

A.Psilotum and Psilophyton
B.Psilotum and Cooksonia
C.Cooksonia and Tmesipeteris
D.Psilotum and Tmesipeteris

• --------------can cause severe anemia and retards physical and mental growth in children.

A.Taenia
B.Ancylostoma duodenale
C.Fasicola
D.Enterobius vermicularis

• Venus flower Basket is made up of--------------sponge.

A.Euplectella   
B.Sycon
C.Leucoselenia
D.Spongilla

•   Chemical equations of different reactions are given below. Choose the reaction of oxidative phosphorylation.

A.NADPH + H+ + + 3ADP + 3Pi +
O2 (CH2O)3 + 6NADP +
9ADP + 9Pi + H2O
B.NADPH + H+ + 3ADP + 3Pi +
O2  NAD + H2O + 3ATP
C. 2(C3H4O3) + 2NADH2
2(C2H5OH) + 2NAD + 2C02
D.2(C3H4O3) + 2NADH2
2(C3H6O3) + 2NAD

• The maximum amount of Oxygen which normal human 100 ml blood absorbs and carries at the sea level is about:

A. 10 ml 
B.  20 ml
C.  30 ml 
D.40 ml

• Which hormone stops the active transport of K+ into guard cells?

A.Gibberellins
B. Auxins
C.Cytokinins   
D.Abscisic Acid

BIOLOGY HSSC-I
(Subjective Part)
SECTION - B (Marks 42)
Q. 2 Attempt any FOURTEEN parts. The answer to each part should not exceed 3 to 4 lines.

• Define the following:
  a. Phyletic lineage
  b. Integrated Disease Management
  c.  Endangered species       
• a. What is hydroponic culture technique? What is the significance of this technique?
  b.Differentiate between population and community.
• a. What is an ester? Express it with chemical equation.        
  b.Write down two differences between RNA and DNA.
  
• Proteins are classified according to their structure:
  a.Classify the proteins into different groups on the basis of structure, also give examples.
  b.Draw structural formula of ATP.
  
• a.Give the name of the given diagram:
  b. Name the labelled parts A and B.
  c. Write down the functions of labelled part A.
  
• What are the contributions of followings scientists in classification?
  a.E. Chatton   
  b.Ernst Heckel
  c. Lynn Margulis and Karlene         
  
• a. Write down any four differences between Gram-positive and Gram-negative bacterial cell wall.       
  b. What is super blue green algae?
  
• a. What are inhibitors? How do Irreversible inhibitors check the reaction rate?
  b. Define red tides.
  
• a.What are water molds?   
  b.Which disease is caused by Phytophthora infestans?        
  c.What was the impact of this disease on Irish people?       
  
• Why is fungi considered a successful group of land organisms? 
  
• a. What is double fertilization? In which plants do this occur? Also write its significance.
  b. Plants Lycopodium and Equisetum belong to which division?     
  
• Write down the botanical names of given plants:
  a. Wheat          
  b.Potato
  c.Shisham       
  
• Write down the functions of the following organs:
  a.Nematocysts           
  b.Syrnix
  c.Swim bladder         
  
• How do Echinoderms resemble Chordates?
  
• a. What is Z scheme?
  b. Name the photosystems involved in Z scheme.       
  c.What are the products of Z scheme?
  
• Differentiate between Alcoholic and lactic acid fermentation.
  
• Figure of Villus is given:
  a.What do the labelled parts A and B show?
  b.Write down the functions of part A and B?
  
• 70% of Carbon dioxide is transported in the blood in the form of bicarbonate in combination with sodium in the plasma:
  a. Write down the chemical equation of the reaction.
  b. Name the enzyme used in the reaction.
  c. What happens when bicarbonate reaches in the lungs?   
  
• Describe any three functions of lymphatic system.    

SECTION - C
(Marks 26)
Note: Attempt any TWO questions. All questions carry equal marks.

Q.3 a. What is virulent phage? How does it reproduce inside the host cell? Give its various steps.
b.What is HIV? Which cell is infected by HIV?
Give its symptoms and mode of transmission.
Q.4 a. Describe the general characters of Mammals
b. Differentiate between acoelomated and coelomated animals. Give examples.
c.Write a note on class Gastropoda and Cephalopoda with examples.
Q.5 a. What is cardiac cycle? Describe its various steps.   
b. Write down the functions performed by blood plasma.
c. Describe the heart diseases given below:

• Heart attack
• Haemorrhage