MCQs Botany-39 Posted on October 22, 2025December 3, 2025Author agropublishers 0 MCQs Botany-39 1. The most resistant and stable component of soil organic matter, contributing to humus formation, is ________ Hemicellulose Cellulose Lignin Peptides 2. Light-dependent reactions occur in _________ chloroplasts Thylakoid membranes Stroma Inner membrane Outer membrane 3. ______________ are called “amphibians of Kingdom Plantae” Gymnosperms Pteridophytes Bryophytes Algae 4. _________ is a gymnosperm species known as the “living fossil” Ephedra gerardiana Ginkgo biloba Cycas revoluta Pinus wallichiana 5. Tomato (Solanum lycopersicum) has a diploid chromosome number (2n) of _____________. 10 24 18 12 6. The Richmond–Lang effect refers to the delay of ________ in plant tissues due to cytokinins. Photomorphogenesis Senescence Cell division Abscission 7. __________ is the primary product of photolysis in light reactions Glucose NADPH Oxygen ATP 8. What is the energy source for the Calvin Cycle? ATP and NADPH Oxygen Light Glucose 9. What is the primary function of the Calvin Cycle? To fix CO2 into glucose To produce oxygen To generate ATP and NADPH To split water 10. Soil organic matter is primarily composed of which of the following major elements? C, N, K, Fe, Mn, Cu C, O, Si, Fe, Al C, H, O, N, S, P C, N, Cl, Na, Mg Loading … Question 1 of 10
