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