Q. Which one of the following statements about the process of photosynthesis is correct?
1) Light energy is directly converted to kinetic energy which oxidizes carbon dioxide
2) Light energy is directly converted to chemical energy which causes the reduction of water
3) Chlorophyll absorbs the chemical energy of light which causes the oxidation of carbon dioxide
4) Chlorophyll absorbs light energy which causes the splitting of water molecules and the reduction of carbon dioxide
Q. Which one of the following statements about starch and glycogen is correct?
1) Both starch and glycogen are found in plant cells
2) Both starch and glycogen are found in animal cells
3) Starch is present in plant cells and glycogen is present in animal cells
4) Both starch and glycogen are present in plant cells as well as animal cells
Q. In plant cells -
1) The nucleus does not need a membrane but chloroplasts are surrounded by their own membrane
2) Nucleus and chloroplasts are surrounded separately by their own membrane
3) The nucleus is surrounded by a membrane but chloroplasts do not need a membrane
4) Both nucleus and chloroplasts are not surrounded by any membrane
Q. Milk of Magnesia is used when people suffer from indigestion of food. It is a -
1) Strong base
2) Mild base
3) Strong acid
4) Mild acid
Q. Stinging hair of nettle leaves injects fluid into the human body causing burning pain. The fluid is -
1) Methanoic acid
2) Tartaric acid
3) Hydrochloric acid
4) Sulphuric acid
Q. Which acid mainly causes muscle fatigue?
1) Acetic acid
2) Lactic Acid
3) Uric Acid
4) Hydrochloric Acid
Q. Urea is synthesized in the -
1) Liver
2) Lung
3) Spleen
4) Kidney
Q. Deforestation accelerates soil erosion and also affects the sub-surface water flow. These two factors adversely affect the -
1) human resources
2) ecosystem
3) climate
4) local vegetation
Q. The malaria parasite responsible for malignant malaria is -
1) plasmodium malaria
2) plasmodium falciparum
3) plasmodium vivax
4) plasmodium ovale
Q. Litmus is extracted from -
1) Turmeric
2) Bark of Cinchona
3) Lichens
4) Mushroom
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