Class 12 Biology Chapter 7 Important Questions Evolution

Question 1. State the two principal outcomes of the experiments conducted by Louis Pasteur on origin of life. (Delhi 2019) Answer: Louis Pasteur’s experiments demonstrated that life comes only from pre-existing life. He showed that in swan-neck pre-sterilised flasks,...

Class 12 Biology Chapter 6 Important Questions Molecular Basis of Inheritance

Question 1. Write the dual purpose served by deoxyribonucleoside triphosphates in polymerisation. (2018) Answer: Deoxyribonucleoside Triphosphates (dNTPs) serve the dual purpose of acting as a substrate. providing energy (from two terminal phosphates). Question 2. Why...

Class 12 Biology Chapter 5 Important Questions Principles of Inheritance and Variation

Question 1. Name the pattern of inheritance where F1phenotype (i) resembles only one of the two parents. (ii) does not resemble either of the two parents and is in between the two. (All India 2019) Or Name the respective pattern of inheritance, where F1 phenotype (i)...

Class 12 Biology Chapter 4 Important Questions Reproductive Health

Question 1. Our government has intentionally imposed strict conditions for MTP in our country. Justify giving a reason. (Delhi 2017) Answer: MTP or induced abortion is the termination of pregnancy due to certain medical reasons. Government of India legalised MTP in...

Class 12 Biology Chapter 3 Important Questions Human Reproduction

Question 1. Why are human testes located outside the abdominal cavity? Name the pouch in which they are present. (all India 2014) Answer: Human testes are located outside the abdominal cavity as it helps in maintaining low temperature (2-2.5%) lower than body...