Biology Question

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. 

1. ___________ are the oldest forms of life on earth. 2. The scalp contains ____________ bacteria per cm square. 3. ______________ sugar is present in milk. 4. The harmful substances released in our body by microorganisms are called ____________. 5. Canine distemper is a __________ disease which infects dogs. 6. Proper disposal of waste and using disinfected water can prevent us from ____________. 7. Jams and jellies are usually preserved by _________. 8. Fungi _______________ causes food poisoning. 9. _______________ disease caused complete destruction of the potato crop during Irish Famine. 10. Microorganisms produce __________ in bio gas reactors. 

1. Push and pulling sorting activity. Take examples from everyday activities done at home and ask students to sort it out. For example : using a remote control, closing door of a refrigerator, opening a drawer, fixing a nail, tieing shoe lace etc. 2. Make a mini catapult using popsicle sticks and a spoon.  3. Make a movable pulley using things easily available at home. 4. Build different car ramps with different slopes and write your observations.  5. Design an activity to show liquid exerts pressure on the walls of the container. 6. Use clay to make different shapes and then observe effect of your one finger, two fingers, three fingers etc. on the shape and then write your conclusions.