9th Class Biology Past Paper 2022
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 biogeography.
(ii) Define macromolecules with an example.
(iii) Name the vegetative and reproductive organs of the mustard plant.
(iv) How are hypotheses made?
(v) How does a theory become a law?
(vi) Write four observations about malaria.
(vii) Differentiate between diffusion and facilitated diffusion.
(viii) Write the function of centrioles.
Q.3 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Define taxon and taxonomic hierarchy.
(ii) Why do some biologists disagree about the classification of kingdom Plantae?
(iii) What are apoptotic bodies?
(iv) What changes take place during anaphase I?
(v) How does cytokinesis take place in plant cells during mitosis?
(vi) Differentiate between somatic cells and germ line cells.
(vii) How does varying carbon dioxide concentration affect the rate of photosynthesis?
(viii) How does lactic acid fermentation take place in skeletal muscles?
Q.4 Write short answers to any FIVE (5) questions: (10 Marks)
(i) What is the main use of enzymes in the paper industry?
(ii) Define cofactor and coenzyme.
(iii) What is the mechanism of enzyme action? Give its equation.
(iv) What is goiter? How is it caused?
(v) Differentiate between insoluble and soluble dietary fibers.
(vi) Write down the symptoms of dengue fever.
(vii) What are agranulocytes? Give their types.
(viii) What is pericardium? How is it important?
PART-II
Note: Attempt any TWO (2) questions.
Q.5
(a) Write a note on the organelle and tissue levels of organization. (4 Marks)
(b) Define plastids and explain their types with a diagram. (5 Marks)
Q.6
(a) Who proposed the five kingdom system? Explain kingdom Protista and Fungi. (4 Marks)
(b) Differentiate between aerobic and anaerobic respiration. (5 Marks)
Q.7
(a) Write the functions of the oral cavity in digestion. (4 Marks)
(b) Explain the percentage composition of blood plasma and draw a diagram. (5 Marks)