9th Class Biology Past Paper 2019
Note: Biology 1st Time Paper of 9th Class.
Group-I (Subjective) 48 Marks
Part– I
Q.2 Write short answers to any FIVE (5) questions: (10)
(i) Define physiology.
(ii) Differentiate between ratio and proportion.
(iii) Define prime population and community.
(iv) Write any two characteristics of a hypothesis.
(v) Define deforestation and write its causes.
(vi) Write any two characteristics of organisms in Kingdom Monera.
(vii) Describe sclerenchyma tissues briefly.
(viii) Define hypotonic and hypertonic solutions.
Q.3 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Differentiate between chromatin and chromosomes.
(ii) How does cytokinesis occur in plant cells?
(iii) When and who discovered meiosis?
(iv) What is meant by metabolism? Who first gave the concept of metabolism?
(v) Describe metabolic pathways.
(vi) What is glycolysis?
(vii) What are anaerobes? Write two examples.
(viii) Sketch the molecular structure of adenosine triphosphate (ATP).
Q.4 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Define scurvy and write its two symptoms.
(ii) How does iodine function in our body?
(iii) What is the function of pepsin in the stomach?
(iv) Write down four causes of ulcers.
(v) How does the rate of transpiration change with air movement?
(vi) Write the four chambers of the human heart.
(vii) How is pus produced?
(viii) Write down two symptoms of dengue fever.
PART-II
Note: Attempt any TWO (2) questions.
Q.5
(a) Explain the relationship of biology to any four other sciences. (5 Marks)
(b) Describe five differences between prokaryotic and eukaryotic cells. (5 Marks)
Q.6
(a) Describe the Lock and Key Model of enzyme action. (5 Marks)
(b) Describe the difference between photosynthesis and respiration. (5 Marks)
Q.7
(a) Describe mineral deficiency diseases. (5 Marks)
(b) What do you mean by blood groups? How are blood groups classified based on the ABO and Rh systems? (5 Marks)