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