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