CYCLIC EXAMINATION
CLASS XII BIOLOGY
MAX. MARKS: 50 TIME: 1.5 HRS
NAME____________ CLASS_____SECTION__________ ROLL NO.
Answer all Questions (10x5 = 50 Marks)
Q.1 Distinguish between Humoral Immune System and Cell-mediated
Immune System.
OR
Define organ transplant and how is the problem of rejection of the transplanted
organ overcome?
Q.2 What are the symptoms of allergic reactions?
Q.3 What are biofertilizers? Name their three main sources.
OR
What is Integrated Pest Management?
Q.4 How are microbes used as source of energy?
Q.5 What is the principle of PCR?
OR
What are the two core techniques that enabled modern biotechnology?
Q.6 Write a note on vectors used during recombinant DNA technology.
OR
Write a brief note on interferons.
Q.7 Write a short note on AIDS, its transmission and control measures.
OR
Name the causative agent, symptoms, prevention and cure for the
diseases: Malaria and Pneumonia.
Q.8 What are mycorrhizae? How are they useful in farming?
OR
List the industrial products related to microbes in human welfare.
CLASS XII BIOLOGY
MAX. MARKS: 50 TIME: 1.5 HRS
NAME____________ CLASS_____SECTION__________ ROLL NO.
Answer all Questions (10x5 = 50 Marks)
Q.1 Distinguish between Humoral Immune System and Cell-mediated
Immune System.
OR
Define organ transplant and how is the problem of rejection of the transplanted
organ overcome?
Q.2 What are the symptoms of allergic reactions?
Q.3 What are biofertilizers? Name their three main sources.
OR
What is Integrated Pest Management?
Q.4 How are microbes used as source of energy?
Q.5 What is the principle of PCR?
OR
What are the two core techniques that enabled modern biotechnology?
Q.6 Write a note on vectors used during recombinant DNA technology.
OR
Write a brief note on interferons.
Q.7 Write a short note on AIDS, its transmission and control measures.
OR
Name the causative agent, symptoms, prevention and cure for the
diseases: Malaria and Pneumonia.
Q.8 What are mycorrhizae? How are they useful in farming?
OR
List the industrial products related to microbes in human welfare.
