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 Regulate fruit ripening and senescence Inhibit plant growth 2. ————- is a stack of thylakoids Lamellae Matrix Granum Stroma 3. Which process ensures genetic diversity in plants by producing haploid cells with unique combinations of chromosomes? Budding Mitosis Binary fission Meiosis 4. 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 Providing structural support to the cell Storing and transmitting genetic information 5. ——- is a defining feature of chloroplasts Chloroplasts play a primary role in cellular respiration Chloroplasts are primarily involved in water and nutrient storage Chloroplasts are present in all eukaryotic cells Chloroplasts contain chlorophyll for photosynthesis 6. Which process is directly dependent on photosynthesis? Decomposition Plant growth Water cycle Cellular respiration 7. What is the primary purpose of mitosis? Produce gametes for sexual reproduction Reduce the chromosome number by half Increase genetic diversity through recombination Enable growth and tissue repair 8. 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 9. What is the immediate source of energy for cellular processes? ATP (Adenosine Triphosphate) NADH (Nicotinamide Adenine Dinucleotide) Glucose FADHâ‚‚ (Flavin Adenine Dinucleotide) 10. Primary function of ———- is to provide structural support to the cell Ribosome Nucleus Plasma membrane Cell wall Loading …
