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