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