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