9th Class Biology Past Paper 2024
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) Differentiate between micromolecules and macromolecules.
(ii) What are parasites? Give an example.
(iii) Write down the scientific name of frog and mustard plant.
(iv) How does a hypothesis differ from an observation?
(v) Define bioinformatics.
(vi) What is turgor pressure?
(vii) Write down two roles of cytoplasm.
(viii) Define magnification.
(ix) What is the magnification power of an electron microscope?
Q.3 Write short answers to any FIVE (5) questions: (10)
(i) Why is the eucalyptus tree harmful to other plants?
(ii) Write down two effects of deforestation.
(iii) Which animal is an inhabitant of northern areas?
(iv) What is metastasis?
(v) What are the advantages of meiosis?
(vi) Why does meiosis not occur in prokaryotes?
(vii) Mention four factors affecting photosynthesis.
(viii) Which is the end product of aerobic respiration?
Q.4 Write short answers to any FIVE (5) questions: (10)
(i) How does the prosthetic group differ from a co-enzyme?
(ii) Explain the lock and key model of enzyme action.
(iii) What is a balanced diet?
(iv) Write the difference between bolus and chyme.
(v) What happens if excessive water is reabsorbed from the intestine?
(vi) Define the terms systole and diastole.
(vii) Define transpirational pull.
(viii) What do you mean by pulmonary circulation?
PART-II
Note: Attempt any TWO (2) questions.
Q.5
(a) How would you define biology and relate it with its major divisions? (5 Marks)
(b) How would you compare the structure and function of an artery, a vein, and a capillary? (4 Marks)
Q.6
(a) Define endangered species. Explain the endangered species in Pakistan. (5 Marks)
(b) Explain the limiting factors in photosynthesis. (4 Marks)
Q.7
(a) Write differences between prokaryotic and eukaryotic cells. (5 Marks)
(b) Describe the role of the large intestine in the absorption of water and defecation. (4 Marks)