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