AP EAMCET Plant Physiology — practice questions
94 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP EAMCET Plant Physiology in the app →Which scientist showed that a mint plant restores air spoiled by a burning candle?Who showed that sunlight is essential for the plant process that purifies fouled air?Who found that glucose made in green plant parts is usually stored as starch?Which green alga did Engelmann use in his prism experiment on light?In Engelmann's experiment, aerobic bacteria gathered mainly in which regions of the spectrum?Who inferred that oxygen released by green plants comes from water?What is the oxidation product when purple and green sulphur bacteria use H2S as the hydrogen donor?How many water molecules are substrate in the glucose equation of photosynthesis?Which chloroplast structure is responsible for trapping light energy?In which part of the chloroplast are sugars synthesised?The biosynthetic phase of photosynthesis depends directly on which products of the light reaction?How many pigments does chromatographic separation of a green leaf extract reveal?Which colour does chlorophyll a show in a leaf pigment chromatogram?Which leaf pigment appears yellow green on a chromatogram?Which pigment is the chief pigment associated with photosynthesis?Accessory pigments absorb light and pass the energy on to which pigment?Besides widening usable light, what else do accessory pigments do?Photosystem I and photosystem II are numbered according to what?What forms the reaction centre of a photosystem?At what wavelength does the reaction centre of PS I absorb maximally?What is the absorption maximum of the PS II reaction centre?Which molecule is reduced at the end of the Z scheme electron flow?The splitting of water is associated with which photosystem?What replaces the electrons that PS II loses during the light reaction?On which side of the thylakoid membrane is the water splitting complex physically located?Which photosystem alone works in cyclic photophosphorylation?What is the first stable product of CO2 fixation in the Calvin cycle?Who used radioactive 14C in algal studies to trace the path of carbon fixation?How many carbon atoms does RuBP, the CO2 acceptor of the Calvin cycle, have?Which enzyme catalyses the carboxylation of RuBP in the Calvin cycle?How many molecules of 3-PGA form when one RuBP is carboxylated?Which is the correct set of the three stages of the Calvin cycle?How many ATP are needed in the Calvin cycle to make one glucose molecule?What are the large cells around the vascular bundles of C4 leaves called?In which cells of a C4 leaf is the primary CO2 acceptor PEP present?Which enzyme fixes CO2 in the mesophyll cells of C4 plants?In C4 leaves, which cells lack the enzyme RuBisCO?Where does the Calvin cycle take place in a C4 plant?The C4 pathway is also known by the names of which two scientists?In bundle sheath cells of C4 plants, which compound is broken down to release CO2?RuBisCO can bind CO2 and which other gas at its active site?Which process begins when RuBP combines with O2 instead of CO2?At about what fraction of full sunlight does light saturation occur?Which structures allow gas exchange in the thick woody stems of plants?What are the end products of complete combustion of glucose?The breakdown of glucose to pyruvic acid is called what?Which process is the only respiratory process in anaerobic organisms?In which part of the cell does glycolysis occur?How many molecules of pyruvic acid form from one glucose in glycolysis?Which enzyme converts sucrose into glucose and fructose before glycolysis?How many enzyme-controlled reactions make up glycolysis?At how many steps of glycolysis is ATP utilised?Which reduced coenzyme forms when PGAL is oxidised in glycolysis?Under anaerobic conditions yeast converts pyruvic acid into which products?Which enzyme reduces pyruvic acid to lactic acid in tired muscle?In eukaryotes, where do the steps of aerobic respiration after glycolysis occur?Which enzyme complex carries out oxidative decarboxylation of pyruvate?Which two coenzymes are required in the pyruvic dehydrogenase reaction?With what compound does the acetyl group condense at the start of the TCA cycle?After which scientist is the TCA cycle also named?Which nucleotide is synthesised when succinyl-CoA is converted to succinic acid?Which mobile electron carrier sits within the inner mitochondrial membrane?In the electron transport system, Complex IV refers to which enzyme?What is the RQ when carbohydrates are the respiratory substrate?The ratio of CO2 evolved to O2 consumed in respiration is called what?Which molecule is the favoured substrate for cellular respiration?Plant growth is called open because of the presence of what?Vascular cambium and cork cambium belong to which type of meristem?In which order do root growth phases occur from the tip backwards?Cells with dense protoplasm, large nuclei and primary walls belong to which growth phase?Vacuolation, cell enlargement and new wall deposition mark which phase of growth?A root elongating at a constant rate gives which kind of curve against time?After mitosis in arithmetic growth, how many daughter cells keep dividing?Which is the first phase of the sigmoid geometrical growth curve?In the exponential growth equation, what does r stand for?Measurement of total growth per unit time is called what?When a cell becomes a tracheary element, what does it lose?Living differentiated cells regaining the capacity to divide is called what?Development covers all changes from seed germination up to which stage?Which group contains only plant growth promoters?Which PGR is mainly involved in growth inhibiting activities such as dormancy and abscission?Who isolated auxin from the tips of oat coleoptiles?From which fungus were gibberellins first discovered?The word auxin comes from a Greek word meaning what?Auxins promote flowering in which crop?Spraying sugarcane with which PGR increases stem length?Which PGR promotes bolting in rosette plants such as cabbage?Zeatin, a natural cytokinin, was first isolated from what source?Cytokinins help to overcome which phenomenon caused by auxin?Ethylene is made in large amounts by senescing tissues and which other tissues?Ethephon hastens ripening of tomatoes and apples by releasing which PGR?Which plant growth regulator is a derivative of carotenoids?By inducing seed dormancy, abscisic acid helps seeds withstand what?Abscisic acid was discovered because of its role in which two events?