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