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