Board Paper of Class 12-Science 2015 Biology (SET 1) - Solutions
General Instructions :
(i) There are a total of 26 questions and five sections in the question paper, All questions are compulsory.
(ii) Section A contains question number 1 to 5, Very Short Answer type questions of one mark each.
(iii) Section B contains question number 6 to 10, Short Answer type I questions of two marks each.
(iv) Section C contains question number 11 to 22, Short Answer type II questions of three marks each.
(v) Section D contains question number 23, Value Based Question of four marks.
(vi) Section E contains question number 24 to 26, Long Answer type questions of five marks each.
(vii) There is no overall choice in the question paper, however, an internal choice is provided in one question of two marks, one question of three marks and all three questions of five marks. An examinee is to attempt any one of the questions out of the two given in the question paper with the same question number.
(i) There are a total of 26 questions and five sections in the question paper, All questions are compulsory.
(ii) Section A contains question number 1 to 5, Very Short Answer type questions of one mark each.
(iii) Section B contains question number 6 to 10, Short Answer type I questions of two marks each.
(iv) Section C contains question number 11 to 22, Short Answer type II questions of three marks each.
(v) Section D contains question number 23, Value Based Question of four marks.
(vi) Section E contains question number 24 to 26, Long Answer type questions of five marks each.
(vii) There is no overall choice in the question paper, however, an internal choice is provided in one question of two marks, one question of three marks and all three questions of five marks. An examinee is to attempt any one of the questions out of the two given in the question paper with the same question number.
- Question 1
How many chromosomes do drones of honeybee possess? Name the type of cell division involved in the production of sperms by them. VIEW SOLUTION
- Question 2
What is a cistron? VIEW SOLUTION
- Question 3
Retroviruses have no DNA. However, the DNA of the infected host cell does possess viral DNA. How is it possible? VIEW SOLUTION
- Question 4
Why do children cured by enzyme-replacement therapy for adenosine deaminase deficiency need periodic treatment? VIEW SOLUTION
- Question 5
List two advantages of the use of unleaded petrol in automobiles as fuel. VIEW SOLUTION
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