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) Uracil (U) Cytosine (C) Adenine (A) 2. Which hormone is responsible for causing the closure of stomata? Ethylene Gibberellin Abscisic Acid Auxin 3. What is a food chain? A linear sequence of organisms that consume each other A group of organisms that coexist in an ecosystem All of these A network of organisms that consume each other 4. What is the main pigment involved in the transfer of electrons in photosynthesis? Carotenoids Cytochrome Chlorophyll c Phytochrome 5. Which statement is true about ethylene? Breaks apical dominance Inhibits fruit ripening Gaseous plant hormone Used in long-term fruit storage 6. Which is a precursor to ethylene in plants? Chlorophyll Methionine Sucrose Glucose 7. Grasses are more sensitive to _________ Thawing Alternate Freezing and Thawing Freezing 8. Cytochromes are a group of biochemicals found in ——— Only in plants Only in animals In almost all living cells Only in bacteria 9. Which of the following is needed in both photosynthesis and respiration? Sunlight Glucose Cytochrome Chlorophyll 10. ———– is the shallow zone of a lake or ocean where most aquatic plants grow Neritic zone Profundal zone Benthic zone Littoral zone Loading …
