CBSE Class 12 Biology For Blind Question Paper Solved 2019

CBSE Class 12 Biology For Blind Question Paper Solved 2019. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

SECTION A

1. Give any one reason why Mendel used a true breeding line of garden pea plants in his experiments.

OR

What are the codons ‘AUG’ and ‘UAA’ referred to as ?

2. Why are lichens called industrial pollution indicators ?

OR

Why are ‘colour blindness’ and ‘thalassemia’ categorised as Mendelian disorders ?

3. Cite an example of a classic case where a disease was spread by a person who was a cook by profession. How did it spread ?

4. How are ‘sticky ends’ formed in a DNA molecule ?

5. Write the scientific name of the plant which exhibits unusual flowering phenomenon by flowering once in twelve years.

SECTION B

6. The distribution of some plants is restricted because of the special need for water to complete their life cycle. Give a specific reason for this requirement along with an example.

OR

Name a human organ that requires lower temperature than the normal body temperature and explain why.

7. How did Morgan and his group attribute the terms ‘linkage’ and ‘recombination’ with respect to position of genes on a chromosome ?

8. Write the kind of professional and medical help that is available for prevention and control of alcohol and drug abuse among adolescents.

OR

How is cancer treated by radiotherapy ? Name any other two approaches for cancer treatment.

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