The first identifiable product of Calvin cycle is ___? B) It does not require light energy done clear. Reason: dark reaction does not occur in light a)If both assertion and reason are true and reason is the correct explanation of assertion. The scientists conducted many experiments and discovered that the 5-carbon RuBP as the initial acceptor molecule. Reason : The CO 2 compensation point is reached when the amount of CO 2 uptake is less than that generated through respiration because the level of CO 2 in the atmosphere is more than that required for achieving CO 2 compensation point. Each photosystem is characterized by the wavelength of light to which its reaction centre is most reactive. a) The dark reactions of photosynthesis are alternatively known as the Calvin cycle. Options (a) grana (b) thylakoids (c) stroma (d) intergranary fibres. Also, mention the process involved in each of these steps. The equation of dark reaction may be summed up as: 6RuBP + 6CO 2 + 18ATP + 12NADPH ———→ 6RuBP + C 6 H 12 O 6 +18 ADP +18P +12 NADP. Photosynthesis and Respiration Multiple Choice Questions and Answers for competitive exams. B. Photosystem I, reaction centre pigment chlorophyll a has absorption peak at 700nm. (Dark Reaction by Calvin Cycle) Q4: Mention the conditions for photosynthesis. Photosynthesis is a redox reaction in which carbon dioxide is reduced to sugars in dark reaction and water is oxidised to release oxygen in light reaction of photosynthesis. Dark reaction of photosynthesis is called so because [CPMT 1976; RPMT 1985;AMU 1988; JIPMER 1988; NCERT 1980] A) It can also occur in dark done clear. C. Organic reaction. The requirements of Photosynthesis are: Carbondioxide, Water, sunlight and Chlorophyll. •The C 3 pathway. Photosynthesis MCQs 1. 90% of the total photosynthesis is carried out by a) algae b) Mesophytes c) Pteridophytes d) Xerophytes 20. Absorption of light take place during photosynthesis (A) Photosystem-I only (B) Photosystem-II only (C) Photosystem-I and Photosystem-II (D) None of the above . In the reduction stage of Calvin cycle, phosphoglyceric acid is reduced to phosphoglyceraldehyde-3-phosphate by ___? The seat of dark reaction of photosynthesis is . A molecule that absorbs light of a specific wavelength in the visible region is called pigment. How many carbon atoms should the initial acceptor molecule in the dark reaction have? 58. Explanation: No explanation available. During the dark reaction of photosynthesis (a) Water is split (b) CO2 is reduced to organic compounds (c) Chlorophyll is activated (d) 6 carbon sugar is broken into 3 carbon sugar (e) None 11. Light is necessary during photosynthesis for heating opening of stomata evolution of Hydrogen Photolysis of water 8. Plants are autotrophs as they prepare their own food with the help of photosynthesis and also green in … Assertion : The atmospheric concentration of CO 2 at which photosynthesis just compensates for respiration is referred to as CO 2 compensation point. 3 carbons. In the final step of Calvin cycle, ribulose biphosphate is regenerated from ___ molecules of PGAL? Photosynthesis ICSE Class-10 Concise Selina Biology Solutions Chapter-6. Chapter 10 Photosynthesis ... split water and release oxygen to the reaction-center chlorophyll B) harvest photons and transfer light energy to the reaction-center chlorophyll C) synthesize ATP from ADP and Pi D) transfer electrons to ferredoxin and then NADPH ... dark to a pH-8 solution. The first step in dark reaction of photosynthesis is . MBBS and engineering stuffs will also be uploaded. 7 people answered this MCQ question is the answer among for the mcq Dark reaction in photosynthesis is called so because Dark Reaction of Photosynthesis (or) Light-independent Reaction. C) Cannot occur during day time done clear. Correct Answer: stroma. Photolysis Photophosphorylation It is a process of splitting of water molecule into 2H+ + 4e- + 1/2 O2 in the … The “Dark” Reactions • Reductive conversion of CO 2 into carbohydrates • Process is powered by ATP and NADPH (formed during the light reactions of photosynthesis) TheCO 2 fixation pathway has several names: •The reductive pentose phosphate (RPP) pathway. How much energy is utilized in the synthesis of one gram mole of glucose 673 kcal 686 kcal 666 kcal 696 kcal Answer: 2 Q2. The end products of Photosynthesis are: Glucose, Oxygen and Water. 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