MCQsPlant physiology MCQs 1 April 9, 2017 October 2, 2017 Question #1: Callus exposed to low auxin and moderate cytokinin concentration will result in multiple shoots roots plantlets no changeQuestion #2: On girdling which part of the plant will die first? root shoot both root and shoot simultaneously plant continues to liveQuestion #3: In ripening fruit, photosynthetic chloroplast becomes non-photosynthetic chromoplast leucoplast apoplast symplastQuestion #4: Gibberellins are known to break dormancy in cereal seeds. This is due to the secretion of protease lipase alpha amylase cellulaseQuestion #5: Respiratory quotient of carbohydrates with associated organic acid synthesis is 1 >1 <1 either (1) or (2) Question #6: In an experiment, the carbon dioxide available to a C3 was labelled with a radioactive isotope and the amount of radioactivity in the chloroplast was measured. As photosynthesis proceeded, in which of the following molecules did the radioactivity first appears? PGAL PEP PGA RuBPQuestion #7: The region where a plant organ is wounded shows suspension of respiration no change in rate of respiration decrease in rate of respiration increase in rate of respirationQuestion #8: Mohl’s half leaf experiment is to prove that chlorophyll is necessary oxygen is released during photosynthesis organic substance is produced carbon dioxide is necessary for photosynthesisQuestion #9: When light strikes chlorophyll molecules in a photosynthetically active chloroplast, they lose electrons. What is the ultimate source of replacement of electrons? water carbon dioxide glucose reduction of NADPHQuestion #10: Under conditions of high atmospheric humidity, hardly any Calcium is transported to developing fruits, this is caused by calcium only being transported through xylem and this transport does not occur anymore. calcium only being transported through phloem and this transport does not occur anymore. transpiration stops, hence transport in both xylem & phloem stops. stomata closes, hence transport to fruit stops.Congratulations, you passed!I'm sorry but you did not achieve the required score. Also read:photophosphorylation, Glycolysis Mnemonic.ALSO WATCH: Plant water relations, Electron transport chain, Photophosphorylation Get weekly Biology Notes, MCQs, Mnemonics and Videos:Share this:Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Tumblr (Opens in new window)Click to email this to a friend (Opens in new window)Like this:Like Loading...Related Digestive EnzymesClotting factors – Mnemonic Leave a Reply Cancel reply This site uses Akismet to reduce spam. Learn how your comment data is processed.