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