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