9th Class Biology Past Paper 2023
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 biology.
(ii) What is the zone of life?
(iii) Write the scientific name of mustard plant and frog.
(iv) What is a biological problem?
(v) Define observations and write their types.
(vi) Write two observations of A.F.A. King.
(vii) Define magnification and resolution power.
(viii) What is a hypertonic solution and a hypotonic solution?
Q.3 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Differentiate between taxonomy and systematics.
(ii) Define species.
(iii) Differentiate between chiasmata and crossing over.
(iv) What is the difference between malignant and benign tumors?
(v) Define cell cycle.
(vi) Define chromosomes.
(vii) What do you mean by photosystem?
(viii) Define ATP.
Q.4 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Define inhibitors and activators.
(ii) Define biocatalysts and write two benefits of biocatalysts.
(iii) Define the specificity of enzymes. Give an example.
(iv) What is meant by villi? Write down its function.
(v) Give two symptoms of constipation.
(vi) Differentiate between source and sink.
(vii) Define angioplasty and bypass surgery.
(viii) Differentiate between atherosclerosis and arteriosclerosis.
PART-II
Note: Attempt any TWO (2) questions.
Q.5
(a) Explain the relationship of biology with five other branches. (5 Marks)
(b) Write a note on endocytosis. Explain your answer with a labeled diagram. (4 Marks)
Q.6
(a) Define the term “extinct” and explain endangered species of Pakistan. (5 Marks)
(b) Write a detailed note on the electron transport chain. (4 Marks)
Q.7
(a) Describe the digestion of food in the small intestine. (5 Marks)
(b) Explain the composition and functions of white blood cells. (4 Marks)