Q. The process by which plants synthesize their food is called
Q. Photosynthesis occurs in
Q. The most active light for photosynthesis is
(A) Violet light
(B) Red light
(C) Blue light
(D) Green light
Q. Which light is most effective in photosynthesis?
Q. What rays of sunlight are mostly utilized by chlorophyll in photosynthesis?
Q. Artificial light can
(A) Destroy chlorophyll
(B) Synthesise chlorophyll
(C) Bring about photosynthesis
(D) Not bring about photosynthesis
Q. Light energy changes into the chemical energy by which of the following process?
(B) By photosynthesis
(C) By respiration
(D) By spewing
Q. Which one of the following is the process involved in photosynthesis?
(A) Potential energy is released to form free energy
(B) Free energy is converted into potential energy and stored
(C) Food is oxidized to release carbon dioxide and water
(D) Oxygen is taken and carbon dioxide and water vapour are given out
Q. Which of the following has the maximum efficiency to convert solar energy into chemical energy?
Q. Which of the following is not the work of roots?
(B) Water absorption
(C) Absorption nutrients
(D) To help the plants
Q. When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up or dries because
(A) Water from soil cannot rise to aerial parts
(B) Roots are starved of energy
(C) Tree is infected by the soil microbes
(D) Roots do not receive oxygen for respiration
Q. ‘Phloem’ in plants is mainly responsible for
(A) Transportation of food
(B) Transportation of amino acid
(C) Transportation of oxygen
(D) Transportation of water
11. Vitamins and Nutrition
Q. Which one of the following does not increase the amount of carbon dioxide in carbon cycle on earth?
(C) Decay of organic matter
(D) Volcanic action
Q. Which one of the following groups of compounds is called ‘accessory dietary factor’?
Q. Which of the following elements is not essential for plant growth?
Q. Funk invented
Q. What are vitamins?
(A) Organic compound
(B) Inorganic compound
(C) Living organism
(D) None of the above
Q. Which one of the following is not an essential micronutrients for plants?
Q. Living organisms require atleast 27 elements of which, 15 are metals. Among these, those required in major quantities, include
(A) Potassium, manganese, molybdenum and calcium
(B) Potassium, molybdenum, copper and calcium
(C) Potassium, sodium, magnesium and calcium
(D) Sodium, magnesium, copper and manganese
Q. In which category of food is the most amount of calories per unit?