Biology Question

1.Write four differences between prokaryotic and eukaryotic cells. 2. What will happen if cell is arrested at meiosis during gamete formation? 3. Write two similarities and two dissimilarities between mitochondria and plastids. 4. Why is salt added to raw fruits and vegetables before making pickles? 5. Write four functions of endoplasmic reticulum.

1.Define health, acute disease, chronic disease, infectious disease, communicable and non communicable disease. 2. Why are different types of medicines used to cure diseases?  3. What happens in the body when someone suffers from a disease?  4. Differentiate between acute and chronic disease.  5. In a village, having poor sanitary conditions, chances of spreading of cholera are more. Justify the statement.  6. Explain by examples that signs and symptoms of a disease depends on the way the microbe infects.  7. In a natural calamity you want to help the needy. Suggest four ways you have thought of for helping them.  8. What are the symptoms shown by a person whose stomach is infected?  9. What are the three limitations for the approach to deal with infectious disease?  10. List six basic conditions for good health. 

1.Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva? (a) Starch breaking down into sugars. (b) Proteins breaking down into amino acids. (c) Absorption of vitamins. (d) Fats breaking down into fatty acids and glycerol. 2.Which among the following is a unicellular organism that reproduces by budding: (a) Hydra (b) Planaria (c) Yeast (d) Spirogyra 3.Which among the following does not reproduce by spore formation: (a) Penicillium fungus (b) Yeast fungus (c) Mucor fungus (d) Rhizopus fungus 4. The rapid spreading of bread mould on slices of bread are due to: (i) Presence of large number of spores in air (ii) Presence of large number of thread-like branched hyphae (iii) Presence of moisture and nutrients (iv) Formation of round shaped sporangia (a) (i) and (iii) (b) (ii) and (iv) (c) (i) and (ii) (d) (iii) and (iv) 5. The asexual reproduction in the Spirogyra involves: (a) Breaking up of filaments into smaller bits (b) Division of...

1. Plant cells are more rigid than animal cells. 2. Cells are the basic structural unit of living organisms.  3. Tomatoes are red in colour.  4. More mitochondria is present in cells engaged in more physiological activities.  5. Nucleus is control centre of cell.  6. Mitochondria is powerhouse of the cell. 7. Plastids are found only in plant cells. 8. Plant cells have big vacoules. 9. Shape of the cells differ in multicellular organisms. 10. The cells remained undiscovered for a long time. 

1. To make a colourful collage of forest products. 2.  To plant trees on ocassion of Vanmahotsav.  3. To make a food chain with the help of paper, beads, strings etc.  4. Collect various types of Seeds of plants.  5. Observe seed germination in gram seed.  6. Make a food pyramid.  7. Show bread mould on bread and discuss how it is formed and how can it be prevented.  8. Prepare a chart of vitamins, deficiency diseases and their symptoms.  9. Make a model of respiratory system.  10. Use clay to make a model of eye.  11. Collect pics of different food items and classify them as proteins, carbohydrates and fats and prepare a wall magazine. 

1. Which of the following is a multicellular organism? a) Euglena           b) amoeba  c) earthworm.    d)  Paramoecium 2. Name the cell organelle that is responsible for forming skeletal framework of animal cell.  a) chromatin network  b) Golgi complex c) Endoplasmic Reticulum  d) Vacuole  3. We use stain to prepare temporary mount of cheek cell and onion peel. Which of the two stains are used to stain them respectively?  a) saffranine and glycerine b) saffranine and iodine c) methylene blue and saffranine  d) saffranine and methylene blue 4. Robert Hooke observed honey comb like structure in a) an onion peel b) a thin slice of potato c) a thin slice of cork d) a leaf 5. The number of chromosomes present in humans is a) 44    b)22     c) 46     d) 23 6. Which of the following organelle helps in protein synthesis?  a) vacoules.         b) ribosome c) chromatin.      d) lysosomes  7. Euglena and Paramecium have special structures for its locomotion and collection of food. Which of the f...

1. Both humans and cattle can be infected by tuberculosis. 2. Vacuum packing strips bacteria of oxygen. 3. Chorella and Euglena are examples of protozoans.  4. Malaria is spread by female Aedes mosquito.  5. Tetanus can be prevented by vaccination.  6. Salt reduce the amount of water content in food and helps in preservation.  7. Mumps is a bacterial disease. 8. Vaccines produce immunity by producing antigens.  9. Vinegar is commonly known as citric acid.  10. Microorganisms exhibit maximum growth in the temperature range of 20 to 35 degrees.