MCQs Botany-15 Posted on 2024-07-122024-11-08Author admin 0 MCQs Botany-15 1. Which statement is true about ethylene? Breaks apical dominance Used in long-term fruit storage Inhibits fruit ripening Gaseous plant hormone 2. Which hormone is responsible for causing the closure of stomata? Abscisic Acid Auxin Gibberellin Ethylene 3. ———– is the shallow zone of a lake or ocean where most aquatic plants grow Benthic zone Neritic zone Littoral zone Profundal zone 4. Which nitrogenous base is unique to RNA and not found in DNA? Uracil (U) Cytosine (C) Guanine (G) Adenine (A) 5. What is a food chain? All of these A linear sequence of organisms that consume each other A network of organisms that consume each other A group of organisms that coexist in an ecosystem 6. Which of the following is needed in both photosynthesis and respiration? Sunlight Cytochrome Chlorophyll Glucose 7. Which is a precursor to ethylene in plants? Methionine Sucrose Chlorophyll Glucose 8. What is the main pigment involved in the transfer of electrons in photosynthesis? Carotenoids Cytochrome Phytochrome Chlorophyll c 9. Grasses are more sensitive to _________ Freezing Thawing Alternate Freezing and Thawing 10. Cytochromes are a group of biochemicals found in ——— Only in plants Only in bacteria In almost all living cells Only in animals Loading …
