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