1) When yeast and certain bacteria carry on anaerobic respiration they produce: a. Carbon dioxide b. Nitrogen c. Water d. Oxygen
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2) One of the following is a water-soluble pigment: a. Carotene b. Chlorophyll c. Anthocyanin d. Xanthophyll
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3) Photosynthesis is: a. Catabolic process b. Anabolic process c. Exothermic process d. Exergonic process
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4) Gibberellins differ from auxins since they produce: a. Cell division b. Stem elongation c. Root Initiation d. Shortening of internodes
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5) Sialic acid is a constituent of: a. Cell membrane b. Cell wall c. Chromosomes d. Dictyosomes
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6) Which pair of structures is usually found in both plant and animal cell: a. Cell membrane and nucleolus b. Cell membrance and cell wall c. Nucleus and chloroplast d. Nucleolus and cell wall
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7) Plant cells do not burst in distilled water because: a. Cell wall is permeable b. Cell wall is living c. Cell wall is elastic, rigid and get stretched d. Cell wall is outer most layer of plant cell
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8) Transpiration is minimized by the deposition of: a. Cellulose b. Pectin c. Cutin d. Mucilage
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9) Unit membrane or (Plasma membrane) is made of: a. Cellulose b. Lipoproteins c. Phosphorproteins d. Phospholipids
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10) Which of the following parts of a cell is non-living? a. Centriole b. Vacuole c. Ribosome d. Mitochondria
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11) Which of the following structures controls the transport of the material into and out of living cell? a. Centrosome b. Cell membrane c. Cell wall d. Ribosome
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12) Atmospheric nitrogen in the soil is fixed by: a. Cereals b. Pulses c. Sugarcane d. Cotton
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13) The pH gradient across the cell membrane provides a powerful form of _____ potential energy largely responsible for driving phosphorylation: a. Chermical b. Physical c. Electrical d. Biological
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14) ______ is obviously useful to a plant as the excitaion by an insect of one or more sensory hairs of the venus's flytrap (Dionea muscipula): a. Chemical potential b. Action potential c. Physical potential d. Biological potential
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15) Both respiration and photosynthesis require: a. Chlorophyll b. Cytochromes c. Sunlight d. Glucose
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16) The role of molybdenum is: a. Chromosome contraction b. Carbon assimilation c. Nitrogen fixation d. Flowering induction
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17) If a cell is placed in a solution and the cell shrinks, the solution is: a. Clear b. Isotonic c. Hypotonic d. Hypertonic
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18) What determines the diffusion of water accumulation of sugars? a. CO2 accumulates, reduces pH, stimulates enzymes resulting in accumulation of sugars b. Increase in CO2 concentration, conversion of organic acids into starch resulting in the increased uptake of potassium ions and water c. Low CO2 concentration, accumulation of organic acids resulting in the increased concentration of cell sap d. None of the above
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19) During aerobic respiration oxidation of glucose results in the formation of: a. CO2 and water b. Hydrogen and water c. Hydrogen and oxygen d. Oxygen and CO2
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20) If CO2 is given off in respirtion, why does the amount of CO2 in the atmosphere remain relatively constant? a. CO2 forms carbonate rocks b. CO2 is a buffer c. CO2 is converted in photosynthesis to carbohydrates d. CO2 is split up during photosynthesis
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21) Non-essential element for the proper growth of plant is: a. Cobalt b. Magnesium c. Chlorine d. Calcium
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22) Fermentation is: a. Complete oxidation of carbohydrates b. Incomplete oxidation of carbohydrate c. Anaerobic respiration d. None of the above
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23) Exogenous application of Gibberellins induces male flowers formation on genetically female plants in: a. Cucumis b. Cucurbita c. Carica d. Coccinia
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24) Basic structure of all chlorophylls comprises: a. Cytochrome system b. Flavoproteins c. Poryhyrin system d. Plastocyanin
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25) Who proposed the concept of unit membrane for tripartite structure of lipoproteins? a. Davson and Danielli b. Robertson c. Seifriz d. Altmann
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26) Deficiency of iron causes: a. Decrease in protein synthesis b. Reduced leaves and stunted growth c. Interveinal chlorosis first on young leaves d. Bending of leaf tip
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27) The removal of apical buds and young leaves _____ branching: a. Decreases b. Increases c. Maintains d. No effect
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28) If a few cells of an alga spirogyra are kept in a strong solution, the cell contents contract away from the cell wall, this is due to: a. Dehydration b. Plasmolysis c. Hydrolysis d. Contraction
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29) Non-living substances of the protoplasm are collectively known as: a. Deutoplasm b. Plasmagel c. Mesoplasm d. Cytoplasm
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30) D.P.D. stands for: a. Diffusion pressure deficit b. Diffusion pressure deficit c. Daily phosphate demand d. Daily photosynthetic depression
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31) The real force causing entry of water into a cell from other cell is: a. Diffusion pressure deficit b. Turgor pressure c. Osmotic pressure d. Wall pressure
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32) Turgidity of a cell is maintained by: a. Diffusion pressure b. Wall pressure c. Osmotic pressure d. Turgor pressure
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33) Mineral salts, which are absorbed by the roots for the soil, are in the form of: a. Dilute solution b. Very concentrated solution c. Concentrated solution d. Very dilute solution
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34) Aerobic respiration is more advantageous to a large organism than anaerobic respiration because aerobic respiration: a. Does not require sunlight b. Produce oxygen as a waste product c. Does not require molecules oxygen and hydrogen d. Releases more energy from an equal amount of nutrients
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35) In a fully turgid cell the values (arbitrary values are shown) of DPD. OP and TP will show the tendency: a. OPD 02 atm; OP 07 atm; TP 05 atm b. DPD 00 atm; OP 15;TP 05 atm c. DPD 10 atm; OP 15 atm;TP 05 atm d. DPD 05 atm;OP 12 atm; TP 07 atm
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36) Light harvesting complexes surrounded by both photosystems (I and II) and _____ light energy to them. a. Draw b. Accumulate c. Transfer d. None of these
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37) Functions and vital activities of the plants are studied under: a. Ecology b. Cytology c. Physiology d. Morphology
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38) Plasmagel is the name of: a. Ectoplasm b. Endoplasm c. Protoplasm d. None of these
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39) The isolation of individual organelle from cell homogenates is achieved through: a. Employment of different solvents b. X-ray diffraction c. Chromatography d. Differential centrifugation
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40) Excessive use of fertilizer causes death of plants due to: a. Endosmosis b. Exosmosis c. Imbibitions d. Turgidity
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41) Swilling of wooden door during rainy season is due to: a. Endosmosis b. Imbibitions c. Capillary d. Deplasmolysis
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42) In fermentation: a. Energy is liberated b. Energy is consumed c. Energy is neither liberated nor consumed d. Energy is stored
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43) Ethylene especially in tomato plants has the following effects: a. Enhances stem elongation b. Reduces radial expansion c. Retards formation of adventitious roots d. Causes leaf senescence
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44) The condition under which transpiration would be lowest a. Environmental conditions are very dry b. When there is high humidity in the atmosphere c. High wind velocity d. There is excess of water in the cells
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45) The nucleoplasm and the cytoplasm are continuous with one another through the nuclear pores in: a. Eukaryotic cells b. Prokaryotic cells c. Cells of blue green algae d. Bacteria
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46) The conditions under which transpiration would be most rapid is: a. Excess of water in soil b. Low humidity, high temperature guard cells are turgid and moist soil c. Low velocity of wind d. High humidity
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47) Nitrogen is essential component of: a. Fat b. Protein c. Carbohydrates d. Mg
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48) Stomata are bound by a pair of guard cells and open guard cells are: a. Flaccid b. Large c. Turgid d. Green
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49) Osmosis means: a. Flow of solute from low concentration to higher concentration b. Flow of solute from high concentration to low concentration c. Flow of solvent from low concentration to high concentration d. Flow of solvent from high concentration to low concentration
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50) When the dark period of shoft day plant is interrupted by a brief exposure of light then the plant: a. Flowers immediately b. Turns into a long day plant c. Will not flower at all d. Gives more flowers
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