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