Q. The process by which plants synthesize their food is called
(A) Osmosis
(B) Respiration
(C) Photosynthesis
(D) Plasmolysis
Ans: (C)
Q. Photosynthesis occurs in
(A) Nucleus
(B) Mitochondria
(C) Chloroplast
(D) Peroxisome
Ans: (C)
Q. The most active light for photosynthesis is
(A) Violet light
(B) Red light
(C) Blue light
(D) Green light
Ans: (B)
Q. Which light is most effective in photosynthesis?
(A) Red
(B) Blue
(C) Green
(D) Violet
Ans: (A)
Q. What rays of sunlight are mostly utilized by chlorophyll in photosynthesis?
(A) Red
(B) Yellow
(C) Green
(D) Blue
Ans: (A)
Q. Artificial light can
(A) Destroy chlorophyll
(B) Synthesise chlorophyll
(C) Bring about photosynthesis
(D) Not bring about photosynthesis
Ans: (C)
Q. Light energy changes into the chemical energy by which of the following process?
(A) Electrolysis
(B) By photosynthesis
(C) By respiration
(D) By spewing
Ans: (B)
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
Ans: (B)
Q. Which of the following has the maximum efficiency to convert solar energy into chemical energy?
(A) Chorella
(B) Tiger
(C) Earthworm
(D) Cuscutta
Ans: (A)
Q. Which of the following is not the work of roots?
(A) Photosynthesis
(B) Water absorption
(C) Absorption nutrients
(D) To help the plants
Ans: (A)
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
Ans: (B)
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
Ans: (A)
11. Vitamins and Nutrition
Q. Which one of the following does not increase the amount of carbon dioxide in carbon cycle on earth?
(A) Respiration
(B) Photosynthesis
(C) Decay of organic matter
(D) Volcanic action
Ans: (B)
Q. Which one of the following groups of compounds is called ‘accessory dietary factor’?
(A) Fats
(B) Hormones
(C) Proteins
(D) Vitamins
Ans: (D)
Q. Which of the following elements is not essential for plant growth?
(A) Sodium
(B) Potassium
(C) Calcium
(D) Magnesium
Ans: (A)
Q. Funk invented
(A) Vitamins
(B) Hormones
(C) Proteins
(D) Enzymes
Ans: (A)
Q. What are vitamins?
(A) Organic compound
(B) Inorganic compound
(C) Living organism
(D) None of the above
Ans: (A)
Q. Which one of the following is not an essential micronutrients for plants?
(A) Boron
(B) Potassium
(C) Sodium
(D) Magnesium
Ans: (C)
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
Ans: (C)
Q. In which category of food is the most amount of calories per unit?
(A) Vitamins
(B) Fats
(C) Carbohydrates
(D) Proteins
Ans: (B)