Hello,Welcome to StudentBro.
Hello,Welcome to StudentBro.
Hello,Welcome to StudentBro.
Assertion & Reason questions comprise two statements: the Assertion (A) and the Reason (R). Students must determine:
Whether the Assertion is true or false
Whether the Reason is true or false
If the Reason correctly explains the Assertion
These questions test both knowledge and the ability to logically connect biological concepts. They are frequently included in CBSE Class 12 Biology exams to assess deeper understanding.
► Click “Download Here” next to your subject to access the free PDF.
♦ Mathematics :
♦ Relations and Functions ⇒ Download Here
♦ Inverse Trignometric Functions ⇒ Download Here
♦ Matrices ⇒ Download Here
♦ Determinants ⇒ Download Here
♦ Continuty and Differentiablity ⇒ Download Here
♦ Application of Derivatives ⇒ Download Here
♦ Integrals ⇒ Download Here
♦ Application of Integrals ⇒ Download Here
♦ Differential Equations ⇒ Download Here
♦ Vector Algebra ⇒ Download Here
♦ Three Dimensional Geometry ⇒ Download Here
♦ Linear Programming ⇒ Download Here
♦ Probability ⇒ Download Here
♦ Physics ⇒ Download Here
♦ Chemistry ⇒ Download Here
♦ Biology ⇒ Download Here
CBSE includes Assertion & Reason questions to:
Test conceptual understanding beyond memorization
Enhance critical thinking and analytical skills
Identify common misconceptions in Biology
Prepare students for competitive exams requiring reasoning
Important topics such as Genetics, Human Physiology, Plant Physiology, and Biotechnology often feature these questions.
There are four main types:
Both Assertion and Reason are true, and Reason correctly explains Assertion
Both Assertion and Reason are true, but Reason does not explain Assertion
Assertion is true, Reason is false
Both Assertion and Reason are false
Recognizing these types helps students answer more accurately and confidently.
Read both statements carefully
Assess the truthfulness of each statement
Determine if the Reason logically explains the Assertion
Apply biological principles and examples when needed
Practice regularly to improve accuracy and speed
Key areas often covered include:
Genetics and Evolution: Mendelian genetics, molecular basis of inheritance
Human Physiology: Circulatory, respiratory, digestive systems
Plant Physiology: Photosynthesis, transpiration, plant hormones
Biotechnology and Its Applications
Strengthens understanding of complex biological concepts
Enhances analytical and reasoning skills
Builds exam confidence
Helps identify areas needing improvement
Example:
Assertion: DNA replication is semi-conservative.
Reason: Each new DNA molecule contains one original and one new strand.
Solution:
Assertion is true
Reason is true
Reason correctly explains the Assertion
Focus on concept clarity rather than memorization
Familiarize yourself with important biological terms and processes
Read both statements carefully before answering
Solve previous year CBSE papers and sample questions
Revise regularly
Confusing correctness of statements with explanation accuracy
Overlooking keywords like “always,” “never,” or “all”
Relying on memorization without understanding concepts
Misinterpreting scientific terminology
NCERT Class 12 Biology textbooks
CBSE sample papers and previous years’ questions
Online quizzes and mock tests
Revision notes and solved exercises
Assertion & Reason questions are crucial in CBSE Class 12 Biology exams. They test both knowledge and reasoning skills. With consistent practice and a clear understanding of concepts, students can excel in these questions and improve their overall exam performance.
