MCQs Biology-15 Posted on November 27, 2025November 27, 2025Author agropublishers 0 MCQs Biology-15 1. The structural unit of compact bone in humans is ——- Haversian canal Trabecula Osteon Canaliculus 2. __________ is an acellular organism that completely lacks a nucleus and other organelles Bacteria Virus Fungi Algae 3. Chromosomes become visible under a light microscope during ———- Metaphase only Interphase Prophase Telophase 4. The small intestine is segmented into the duodenum, jejunum, and ileum, in which———— Jejunum is mainly secretory Duodenum is primarily absorptive All parts perform equal functions Ileum absorbs bile salts and vitamin B12 5. Genetic drift refers to ——– Random changes in allele frequencies Mutations only Use and disuse of organs Selection of the best traits 6. Synaptonemal complex, which forms between homologous chromosomes during prophase I of meiosis, is mainly composed of ———- Lipids Proteins RNA DNA 7. Adenine pairs with thymine through ———— One hydrogen bond Two hydrogen bonds Three hydrogen bonds Ionic bonds 8. The structure of DNA is best described as a —— Triple helix Double helix Single strand Branched chain 9. Which term describes a species that no longer exists? Fossil species Extinct species Transitional species Endangered species 10. DNA-binding proteins typically recognize ———— Major groove Minor groove Phosphate backbone Both grooves equally Loading … Question 1 of 10
