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