Class 12 Biology Notes

Bihar Board Class 12 Biology Ecosystem Objective Questions and Answers (50 MCQs with One Word Answer)

October 23, 2025 by Kaish

The term Ecosystem refers to a biological community of living organisms interacting with each other and their physical environment. It includes both biotic (living) and abiotic (non-living) components that are interlinked through nutrient cycles and energy flows. This chapter is an important part of Bihar Board Class 12 Biology Ecosystem ,helping students understand the relationships …

Bihar Board Class 12 Biology – Biotechnology Principles and Processes Objective Questions with Answers

October 22, 2025 by Kaish

Biotechnology is one of the most advanced and fascinating fields of modern biology. It combines biology and technology to create useful products for human welfare.In this chapter, students learn about recombinant DNA technology (rDNA), restriction enzymes, vectors, cloning, and genetic engineering techniques. Here are 50 important objective questions with answers from Bihar Board Class 12 …

Bihar Board Class 12 Biology Human Health and Diseases Objective Questions with Answers

October 21, 2025 by Kaish

The chapter “Human Health and Diseases” is one of the most important topics in Class 12 Biology for Bihar Board students. It explains how the human body defends itself from various diseases, how pathogens infect, and how vaccines and immunity work. To help you prepare better, here are 50 important objective questions from this chapter, …