MCQs Biology-25 Posted on December 2, 2025December 2, 2025Author agropublishers 0 MCQs Biology-25 1. Which pigment absorbs blue and red light most strongly? Carotene Xanthophyll Chlorophyll a Chlorophyll b 2. The key product of light reactions include ________ Pyruvate Acetyl-CoA Glucose ATP and NADPH 3. Photorespiration increases when ___________ Temperature is high O₂ is low Light is low CO₂ is high 4. In humans, the organ that produces insulin is the ______ Pancreas Thyroid Spleen Liver 5. The Latin name humans, ie., Homo sapiens consists of which taxonomic ranks? Genus & Class Family & Order Genus & Species Genus & Family 6. Integrated Farming System primarily aims to Optimize resource utilization and sustainability Promote monocropping Increase use of chemical fertilizers Maximize livestock population 7. The movement of water molecules from a region of high concentration to an area of low concentration across a semipermeable membrane is called _______ Osmosis Active transport Filtration Diffusion 8. The Warburg effect describes ___________ Reduced photosynthesis with high O₂ Enhanced chlorophyll synthesis Reduced photosynthesis with high CO₂ Increased respiration at night 9. Which of the following is an acellular organism that completely lacks a nucleus and other organelles? Chlamydomonas Saccharomyces cerevisiae Tobacco Mosaic Virus Escherichia coli 10. Rubisco catalyzes a crucial step of which reaction? CO₂ fixation ATP synthesis NADP⁺ reduction CO₂ reduction Loading … Question 1 of 10
