EOC Q12) Which of the following are the products of the transamination of glyoxy
ID: 204138 • Letter: E
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EOC Q12) Which of the following are the products of the transamination of glyoxylate with aspartate? alanine and -ketoglutarate glycine and oxaloacetate alanine and pyruvate glycine and -ketoglutarate glycine and pyruvate 19. (EOC Q15) In the C4 pathway, how many ATP are required to transfer each molecule of CO2 to the bundle-sheath cell? 1 2 3 4 5 20. (EOC Q18) Which of the following occurs in the stroma as a result of increased activity of the light reactions? decreased pH oxidation of ferredoxin decreased concentration of NADPH increased concentration of Mg2+ All of the answers are correct. 21. (EOC Q19) Which of the following is used as a transport carbohydrate? amylose sucrose starch amylopectin All of the answers are correct. EOC Q12) Which of the following are the products of the transamination of glyoxylate with aspartate? alanine and -ketoglutarate glycine and oxaloacetate alanine and pyruvate glycine and -ketoglutarate glycine and pyruvateExplanation / Answer
18. Transamination is a reaction in which an amino group from amino acids is removed resulting formation of keto or oxoacids. The amino acids aspartate and glyoxalate are transaminated to produce oxaloacetate and glycine. Option 2 is correct.
19. The C4 plants are distinct from C3 plants in the process of carbon fixation and leaf anatomy. In C4 plants, the leaves contain Kranz anatomy and the mesophyll contains mesophyll cells and bundle sheath cells. The CO2 fixation occurs in bundle sheath cells and for this, the energy required is supplied in the form of ATP. Thus, 2 ATP molecules are required to export CO2 from mesophyll to bundle sheath cells. Option 2 is correct.
20. Photosynthesis is the prtocess of synthesis of nutrients in plants using sunlight and CO2. The chloroplasts are the cell organelles in which the photosynthesis is carried out. The photosynthesis is accomplished in light and dark reactions. The light reactions occur in grana and dark reactions occur stroma of chloroplasts. The increased light reactions in grana cause some changes in stroma and these include increased pH, concentration of Mg2 + and NADPH and reduced ferredoxin. Option 4 is correct.
21. In plants the nutrients are synthesized by photosynthesis. The carbohydrates are the end products produced during photosynthesis. In plants, the carbohydrates synthesized are transported to all plant parts by phloem. The most transported form of carbohydrate in plants is sucrose. Option 2 is correct.
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