9th Class Biology Past Paper 2021
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) What is meant by molecular biology?
(ii) What is tissue level? Give one example.
(iii) Define biotechnology.
(iv) What are qualitative observations? Give examples.
(v) What is meant by the control group in an experiment?
(vi) What is meant by summarization of results?
(vii) What are ribosomes? Write down their functions.
(viii) What is reverse osmosis?
Q.3 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Write the characteristics of algae and protozoans.
(ii) Differentiate between autotrophs and heterotrophs.
(iii) What is meant by binomial nomenclature?
(iv) Differentiate between karyokinesis and cytokinesis.
(v) What is regeneration? Give an example.
(vi) What is meant by diploid and haploid cells?
(vii) Define anaerobic respiration and write its types.
(viii) Differentiate between oxidation and reduction.
Q.4 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Define activation energy.
(ii) Differentiate between anabolism and catabolism.
(iii) What are prosthetic groups?
(iv) Write any two symptoms caused by vitamin deficiency.
(v) What is peristalsis?
(vi) Define the terms systole and diastole.
(vii) What is pus? How is it formed?
(viii) What are the preventive measures for dengue fever?
PART-II
Note: Attempt any TWO (2) questions.
Q.5
(a) Write in detail about population and community levels. (4 Marks)
(b) Write a detailed note on the cell membrane. (5 Marks)
Q.6
(a) Describe the importance of biodiversity. (5 Marks)
(b) Define the dark reaction and summarize the events of the dark reaction. (4 Marks)
Q.7
(a) Briefly define carbohydrates and proteins. (4 Marks)
(b) Describe cardiovascular disorders and explain myocardial infarction in detail. (5 Marks)