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