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