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