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