MCQs Botany-21 Posted on February 11, 2025August 30, 2025Author agropublishers 0 1. What is the primary role of ethylene in plants? Inhibit plant growth Induce seed dormancy Promote cell elongation Regulate fruit ripening and senescence 2. ————- is a stack of thylakoids Stroma Lamellae Granum Matrix 3. What is the primary purpose of mitosis? Produce gametes for sexual reproduction Increase genetic diversity through recombination Enable growth and tissue repair Reduce the chromosome number by half 4. Which process is directly dependent on photosynthesis? Cellular respiration Decomposition Plant growth Water cycle 5. Which of the following is a primary function of the cell membrane? Synthesizing proteins for cellular functions Regulating the movement of substances in and out of the cell Storing and transmitting genetic information Providing structural support to the cell 6. Primary function of ———- is to provide structural support to the cell Cell wall Nucleus Plasma membrane Ribosome 7. Which process ensures genetic diversity in plants by producing haploid cells with unique combinations of chromosomes? Meiosis Mitosis Binary fission Budding 8. What is primary succession? Ecological succession in a previously uninhabited and barren area with no existing soil Recovery of an ecosystem after a disturbance, utilizing existing soil and vegetation Reestablishment of an ecosystem after human activities like logging A natural progression of species replacement in an existing grassland ecosystem 9. What is the immediate source of energy for cellular processes? NADH (Nicotinamide Adenine Dinucleotide) Glucose FADHâ‚‚ (Flavin Adenine Dinucleotide) ATP (Adenosine Triphosphate) 10. ——- is a defining feature of chloroplasts Chloroplasts contain chlorophyll for photosynthesis Chloroplasts are primarily involved in water and nutrient storage Chloroplasts are present in all eukaryotic cells Chloroplasts play a primary role in cellular respiration Loading …
