163. It moves mainly from the apical to the basal end (basipetally). The hormone responsible for apical dominance is. Which pigment system is inactivated in red drop? (d): The empirical formula of chlorophyll – a molecule is CssH-^Oj^Mg. This process permits water to pass through the sead coat so that embryo can begin metabolism. (d) transpiration pull and cohesion theory of Dixon and Jolly. ABA (abscisic acid) is a powerful growth inhibitor. It blews up suddenly after about half an hour due to phenomenon of imbibition. Osmotic potential or solute potential represents the effect of dissolved solutes on water potential solutes reduce the free energy of water by diluting the water. (d): Carotenoids of higher plants are fat soluble compound that includes carotenes and xanthophylls. It is essential for synthesis of tryptophan amino acid, which forms IAA (Indole Acetic Acid) its deficiency causes chlorosis of older leaves. An adaptation for better gaseous exchange in plant leaves is. In light dependent phase ocurs in grana fraction of chloroplast. 43. Physiology MCQ Bank 1. (a) in short day plants under long day conditions, (b) in day-neutral plants under dark conditions. Sulphur is an important nutrient for optimum growth and productivity in. A bottle filled with previously moistened mustard seeds and water was screw capped tightly and kept in a corner. Soil pH strongly affects the microbial activities. For 6 molecules of CO2 it needs 18 ATP and 12 NADPH, molecules so for one molecule of CO2 it needs 3 ATP and 2 NADPH2 molecules. 44. 30. MCQ-06: Plant Physiology Questions from CSIR Papers (Advanced – Set 2) @. Anatomy and Physiology Fill In the Blank Questions For practice. Explanation are given for understanding. 21. 162. Thus ATP synthesis occurs in both PS-I and PS-II. 71. (a): Rate of salt absorption increases when temperature increases but to a certain limit as salt absorption is inhibited at higher temperature because certain enzymes are not active at higher temperature and carriers are not synthesised. Mesophyll cells are connected with each other through plasmodesmata. (a): In C4 plants, there are 2 carboxylation reactions, first in mesophyll chloroplast and second in bundle sheath chloroplast. (a): Flower formation is a transitional phase in the life eycle of plant. Which is the first C02 acceptor enzyme in C4 PLANTS? 116. Abscisic acid (ABA) is a common germination inhibitor present in the seed coats. The wiki was launched in late September 2005, the wiki has grown to over 4900 "legitimate content pages", and there have been over 11.8 million page views in the 10 years 2005-2015. Which of the following hormones can replace vernalisation? The major physiological function of cytokinins is to enhance cell division. Chlorophyll-a. Phytohormones are chemical substances which are synthesized by plants and are naturally occurring. Manganese participates in the photolysis of water in pigment system II during photosynthesis and thus it helps in the electron transport from water to chlorophyll. As a result, incipient wilting occurs. It is a part of nitrate reductase enzyme which helps in nitrogen fixation. This is an appropriate way to absorb CO2 through open stomatas at night, when transpiration stress is low, and conserve water during the heat of the day. Chlorophyll-a is the only one common to all organisms that possess chlorophyll (the only one in blue green algae) and is believed to be specifically required. (d): Water potential is the difference in the free energy or chemical potential per unit molal volume of water in a system and that of pure water at the same temperature and pressure. Prep for a quiz or learn for fun! Stomata close when this process is reversed. Zn is essential for the synthesis of tryptophan amino acid. Recently it has been recognized that a significant amount of auxin transport also occur acropetally (from basal end to the apical end) in the root. Which of the following movement is not related to auxin level? The enzymes solubilize the reserve food of the seed. Everyone. (b): Water is absorbed from soil by root system and mainly by root tips. 102. 149. 149. Chemically combined water is not available to the plants at all. <> (c): Photosynthesis is actually oxidation reduction | process in which water is oxidised and CO2 is reduced to carbohydrates. (d) drug designing involving inhibition of DNA synthesis of the pathogen. DPD = OP-TP. (c): The C4 plants have a characteristic leaf anatomy called kranz anatomy. Chemotropism is a directional paratonic movement that occurs in response to a chemical stimulus. 1. The closing and opening of the leaves of Mimosa pitdica is due to, 111. By exogenous application of gibberellins many biennials can be induced to behave as annuals and they no more require the natural chilling treatment for their flowering. 122. They contain kinetin and related compound generally called as kinins chemically, cytokinins are degradation product of adenine, ATP, NAD and NADP. 156. Hormone primarily connected with cell division is. 72. 11. So in a fully turgid cell the water potential is zero. is increased and thus D.P.D. Photophosphorylation is of 2 types –. 60. Light reaction is associated with the grana of the chloroplasts. (c): Chlorophyll-a occur in all photosynthesizing plants except bacteria. (a): According to biological species concept a species is a natural inbreeding or panmictic species or group of natural populations which have essentially similar morphological traits, they are genetically distinct and reproductively isolated from others. A pigment which absorbs red and far-red light is. A chemical believed to be involved in flowering is. 188. Start learning now for Free! Bidirectional translocation of solutes takes place in. Which one of the following elements is not an essential micronutrient for plant growth? Which one increases in the absence of light? Before reproductive stage there is too much elongation of internodes but there is less leaf formation. Mesophyll cells fix CO, with the help of PEP in presence of PEPase to form OA A. (c): Lenticels generally appear under stomata. Movement of leaves of sensitive plant, Mimosa pudica are due to. Hatch and Slack (1966) reported that a 4-C compound oxaloacetic acid (OAA) is the first stable product in CO2 reduction process. It is a part of catalases, peroxidases, cytochromes etc. Add to Wishlist. (d): Phytochrome is the photoreceptive pigment. If cytokinin to auxin ratio is low, then root formation takes place but if the ratio of cytokinin to auxin is high, then, there is formation of meristematic cells in the callus. (c): Plants can use a small portion of light which falls upon them. It occures in sugarcone, maize etc. Thus, the osmotic entry of water is due to high osmotic pressure of the cell sap. The enzyme that catalyses carbon dioxide fixation in C4 plants is. It means that the cell has no further capacity to absorb any water. It is needed for proper growth and development. 133. 7. This water is held by the capillary forces around and between the particles and is of greatest importance to plant life. This type of unidirectional transport is termed polar transport. Anatomy and Physiology is a dynamic textbook for the two-semester human anatomy and physiology course for life science and allied health majors. Greatest producers of organic matter are. (c): When a cell is placed in a hypotonic solution then endosmosis occurs it means water enters in the cell and makes the cell turgid. increases in sub-stomatal cavities —» ABA participation K+ ions exchange stopped —» K+ ions transported back into subsidiary cells —> Decreased pH —> Starch synthesized in guard cells —» Decreased O.P. Magnesium is a component of chlorophyll. At lower atmospheric pressure there is increase in the rate of evaporation. 184. It also causes the closure of stomata under conditions of water stress as also under high concentration of C02 in the guard cells. Dwarfness can be controlled by treating the plant with. Roots of which plant contains a red pigment which have affinity for oxygen. 1. The ripening on demand can be induced in these fruits by exposing them to normal air containing about 1 ppm of ethylene. 8. Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Some may gauge your conceptual understanding; others might test your practical implications. (c): Richmond and Land, 1967 observed that degradation of protein and chlorophyll was delayed in the detached leaves, If there was cytokinin in the medium. 80. 16. Image Source: en.docsity.com. Neutral or slightly acidic soil (5.5 – 6.5) remains best for the growth of majority of plants. Under which one of the following categories will you place this plant? In C4 cycle, CO2 combines with phosphoenol pyruvic acid to form oxaloacetic acid. (b): Magnesium is an important constituent of ; chlorophyll, found in all green plants and essential for photosynthesis. Phototropism means growth of plants in response to light and geotropism means growth of plants towards gravity. Seed coats may contain relatively high concentrations of growth inhibitors that can suppress germination of the embryo. Adiantum caudatum is commonly called as walking fern. The apical dominance is due to interaction between auxin and cytokinin. Imbibition of water causes the embryo within seed to produce a- and P-amylases. Cell elongation in internodal regions of the green plants takes place due to. 26. (b): 2,4-D is a famous herbicide or weedicide which especially kills broad leaved weeds. (b): The process by which the dormant embryo of seed resumes active growth and forms a seedling is known as germination. 28. There are two photochemical complexes, known as photosystem I and II. Given on this page is a online quiz on the topic of Human Physiology. 98. Which of the following prevents the fall of fruits? 78. Auxin, a growth promoting phytohormone present in apex inhibits the growth of axillary buds so that only the apex continues to grow. 13. (iii) Presence of impermeable seed coat to oxygen; e,. (d): Stomata are tiny pores found in the epidermis of leaves and other soft aerial parts. It regulates movement of stomata. (a) application of iron and magnesium to promote synthesis of chlorophyll, (c) treatment of the plants with cytokinins along with a small dose of nitrogenous fertilizer. Correct Answer : A. Opening and closing of stomata is due to the, (b) change in turgor pressure of guard cells, 142. Florigen is a chemical involved in flowering. Disclaimer Copyright. These are called photosynthetically active radiations. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. As Calvin cycle takes in only one carbon (as CO2) at a time, so it takes six turns of the cycle to produce a net gain of six carbons (i.e., hexose or glucose). CO2 conc. These C4 plants have a characteristic leaf anatomy called Kranz anatomy. (b): In Calvin cycle, C02 is accepted by Ribulose -1,5- diphosphate (RuDP) already present in the cells and a 6-carbon addition compound is formed which is unstable. 75. The regulator which retards ageing/senescence of plant parts is. in colour. It involes three organelles chloroplasts, mitochondria and peroxisomes. It is delimited by a protection layer on the stem side and a separation layer on the organ side. Copper is present in haemocyanin. The symptoms that occur only on leaves are irregular, greyish brown lesions which coalesce and bring about collapse of leaf. 6. It is clear that the first acceptor of CO2 is Ribulose 1-5 diphosphate. MCQ, so some practice with this type of question is needed. P-Protein bodies and callose form blocking plugs. (b): C4 pathway was first reported in members of family Gramineae (grasses) like sugarcane, maize sorghum, etc.. (d): Transpiration pull cohesion theory for ascent of sap in trees is most widely accepted. The twinning of tendrils around a support is a good example of. In calculating the shunt fraction, the following need to be measured or estimated: a) mixed venous oxygen content b) pulmonary end-capillary oxygen content c) arterial oxygen content d) alveolar partial pressure of oxygen e) haemoglobin concentration 2. The Black Bank MCQ Collection is available on a Wiki site. (a): Zinc is available to the plants for absorption in the divalent form. 180. Capillary water fills the spaces between non- colloidal soil particles and forms films around them. For the purpose of preparing and revising for PG entrance examinations, I recommend: Ganong’s Review of Medical Physiology by Barrett et al, published by Mc Graw Hill, 2012. 120. These are found in higher plants red algae, green algae, fungi and photosynthetic bacteria. In contrast, photosynthesis of C4 species is generally saturated by CO2 levels near 400 fx I/I. 146. It also helps in binding of ribosomal particles where protein synthesis occurs. This is known as ascent of sap. c- lactic acid. Nepenthes (pitcher plant) is an insectivorous plant. The growth of culture was most dramatic when the liquid endosperm of coconut, also known as coconut milk, was added to the culture medium. 93. (d): The movement of organic food or solute in soluble form from one organ to another organ is called translocation of solutes, e.g., from leaves to stem and roots for consumption. It involves production of two ATP molecules, no NADPH, is produced. (c): Photorespiration is a process the rate of which increases under the influence of light, CO2 is released and O2 is used but no ATP is formed. Its stem is green and bears green lobed or dissected leaves. During this electron transport FAD and Fe of different cytochromes are successively reduced and oxidised and at certain points, enough energy is released which is used to bind ADP with ip to form ATP (figure). Dark reactions of photosynthesis occur in, (c) stroma outside photosynthetic lamellae. When apical bud is removed the lateral buds sprout. Porphyrin is a cyclic tetrapyrrole structure, I having a magnesium atom in the centre. This conversion of energy from one form to another is a complex process that depends on cooperation between many pigment molecules and a group of electron transfer proteins. Pigment System I is relatively very weakly fluorescent (a): The tropic movement in response to the stimulus of contact is thigmotropism e.g. Certain succulents that are native to hot, dry conditions (e.g., cacti, Kalanchoe, and Bryophyllum) act in an opposite manner. Borthwick, Hendicks and Parker in 1952, discovered phytochrome, which is a pigment received light existed in two inter convertible forms active form and inactive form. 154. 25. View More. It is always from an area or cell of lower DPD to the area or cell of higher DPD. (a): Gibberellins promotes seed germination. Endocrine physiology MCQs SlideShare. (d) regulators synthesised by plants and influencing physiological processes. 186. (a): Minerals absorbed by roots move to the leaf through xylem. 175. In a few photosynthetic bacteria other kinds of chlorophyll, bacteriochlorophylls, occur. Hence only PS-I produces NADPH2. Gibberellins are growth promoting phytohormone that results in overcoming seed dormancy and bolting. 126. Content Guidelines 2. 185. One has to note that both reaction centres types are present in chloroplasts of plants and cyanobacteria, working together to form an unique photosynthetic chain able to extract electrons from water, evolving oxygen as a byproduct. Addition of CO2 to any compound is called carboxylation. Gibberellins can substitute for the long-day requirement in some species, showing an interaction with light. This xylem of the leaves is in continuation with xylem of stem and roots and hence this pull is transmitted downwards. 151. The lower CO2 compensation points in C4 than in C, species arise from the much lower photorespiratory release of CO2 by C4 plants. Anthesis is a phenomenon which refers to. endobj 114. These pigments absorb light energy and transfer it to the reaction centre – P-700. 179. 87. (b): Zelitch (1963) suggested that glycolic acid is formed in the guard cells. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. Turning Brain is an App of Medical Physiology Lectures in Hindi/English, MCQ practice Session, Question bank contains last year question papers, expected questions for theory exam. 36. (d): Growth hormones or phytohormones are defined as organic substances which are synthesized in minute quantities in one part of the plant body and transported to another part where they influence specific physiological processes. They are also regarded as short night plants, (a) obtain energy from radiations and hydrogen from organic compounds, (b) obtain energy from radiations and hydrogen from inorganic compunds. The lenticel of phellogen itself also has intercellular spaces. (a): Scarification means the application of those methods by which the hard seed coat is ruptured or softened so that it becomes permeable to water, gases and the embryo can expand. (iv) Presence of germination inhibitors like ABA (abscisic acid) and phenolics, etc., in seed coat or fruit pulp, e.g., in tomoto, inhibitor is present in fruit pulp. Light reaction occurs in grana fraction of chloroplast and in this reaction are included those activities, which are dependent on light. A high O2/CO2 ratio means that O2 should be high and CO2 should be low because then only RuBP-carboxylase can act as RuBP-oxygenase. A typical cytochrome P450 catalysed reactions is, NADPH + H+ + O2 + RH => NADP+ + H2O + R – OH, 108. Xylem plays an important role in conduction of water. (a): In Adiantum caudatum, adventitious buds develop at the leaf tips. (a): Auxins are well known to promote elongation of stem and coleoptile. • Validated and recommended by the top medical faculties. These bodies and callose together block the pores of sieve tube elements. 159. (d) both positively and negatively charged but disproportionate mixture. (ii) Light independent phase or dark reaction. When such leaf tips happen to touch the soil, they form new plant. Cellular totipotency is demonstrated by. Conversion of starch to organic acids is required for. CARDIOVASCULAR MCQ PASSTHEFRACP COM. Pfr is (far red) yellowish green and absorbs light at 730 nm of wavelength. (c): In artificial ripening of banana, uncontrolled application of ethylene gas may cause over ripening of banana. Physiology is the scientific study of the normal function in living systems. During flowering, vegetative shoot apex is converted into reproductive shoot apex. (b) it is an enzyme involved in oxidation reactions, (c) it has an important role in metabolism, 107. 1. The first cytokinin to be discovered was the synthetic analog kinetin. A fresh plant shoot is cut under water and is inserted into the side tube through a cork, fitted into the mouth of this tube. It is because ‘flavanoids’, which are inhibitors of GA are not formed in dark and hence in absence of flavanoids, GA show their full effect, i.e., elongation (etiolation). 2. 22. 'Physiology Multiple Choice Question Bank April 29th, 2018 - Physiology Multiple Choice Question Bank Primary Exam for FANZCA July 2001 Update v3 02 Primary ANZCA MCQ Bank Update after July 2001 exam' 'Oxford University Press Online Resource Centre May 2nd, 2018 - Chapter 21 Multiple Choice Questions Instructions Answer The Following Questions And If the auxin concentration is higher than cytokinin, the apical bud will dominate the growth. Each jaw has long sensitive hairs on its upper surface and also has many digestive enzymes. Auxins are growth promoting phytohormones. The main purpose of the wiki is to allow sharing of knowledge about the exam questions and any related topic. Reception of pollen by stigma is called pollination. MCQ quiz on Human Physiology multiple choice questions and answers on Human Physiology MCQ questions on Human Physiology objectives questions with answer test pdf for interview preparations, freshers jobs and competitive exams. In photosynthesis energy from light reaction to dark reaction is transferred in the form of. (c): Vernalization is the method of promoting flowering by exposing young plants to cold treatment e.g., winter verieties of wheat, barley, oats and rye are given artificial cold treatment and planted in spring in areas of very harsh winters such as Soviet Union to promote flowering in them. (d) movement of sunflower head tracking the sun. After absorption of water by root hair, its T.P. This helps in overcoming seed dormancy. In passive water absorption transpiration pull is responsible for absorption of water. 138. 135. (b): In a full turgid cell. 109. 48. It involves photo-oxidation of different cellular components including chlorophyll. (d) conversion from ammonium to nitrate in soil. They contain iron porphyrin or copper porphyrin as prosthetic groups. 81. B 210 . 101. A collection of Physiology MCQs for PG entrance aspirants. (d): Removal of apical bud shows lateral branching. The absorption of water by the solid particles of an adsorbent causing it to enormously increase in volume without forming a solution is called imbibition. Which technique has helped in investigation of Calvin cycle? It is consisted of a porphyrin head and a phytol tail. Abscisic acid is a stress hormone and it is produced during water scarcity, when the transpiration rate exceeds absorption, the plant faces water stress condition. The rest of soil water (hygroscopic, combined, free, gravitational and 25% capillary water) are not available to plants. Porometer is an apparatus for knowing the relative size of stomata. 148. In guard cells when sugar is converted into starch, the stomatal pore. 36. This decline in photosynthesis is called “Red drop”. A high amount of potassuim is required in the process of protein synthesis. Anatomy and Physiology of Skeletal System MCQ with detailed explanation for interview, entrance and competitive exams. As a result, stomatal aperature closes. It is not a constituent of any enzyme but accelerates the rate of activity of many enzymes. Physiology (MCQs) Model Paper MCQ.26 During the cardiac cycle, the maximal right ventricular systolic pressure (mmHg) is: a) 5 b) 8 c) 25 d) 80 e) 120 Key: c Topic Specification: CVS – Pressure changes during cardiac cycle MCQ.27 Vagal stimulation results into slowing of the heart rate. Which treatment could be most beneficial to obtain maximum seed yield? many seeds of legumes. Cytokinins bring about division even in permanent cells. 166. The opening of stomata is initiated by exertion of H+ by guard cells, intake if K+ and CI, disappearance of starch and appearance of organic acids like malic acid.
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