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