CBSE Class 12 Biology Sample Paper 2013 Solved Set H

Read and download PDF of CBSE Class 12 Biology Sample Paper 2013 Solved Set H designed as per the latest curriculum and examination pattern for Class 12 issued by CBSE, NCERT and KVS. The latest Class 12 Biology Sample Papers have been provided with solutions so that the students can solve these practice papers and then compare their answers. This will help them to identify mistakes and improvement areas in Biology Class 12 which they need to study more to get better marks in Class 12 exams. After solving these guess papers also refer to solved Class 12 Biology Question Papers available on our website to build strong understanding of the subject

Sample Paper for Class 12 Biology Pdf

Students can refer to the below Class 12 Biology Sample Paper designed to help students understand the pattern of questions that will be asked in Class 12 exams. Please download CBSE Class 12 Biology Sample Paper 2013 Solved Set H

Biology Class 12 Sample Paper

SECTION-A

1. When does an oocyte complete oogenesis? When does oogenesis begin in a human female?

2. Which organisms are usually the pioneer species in a (i) Hydrarch and (ii) Xerarch succession?

3. Give an example to show how the same species can occupy more than one trophic level in the same ecosystem.

4. Cucurbits and coconut bear unisexual flowers but are monoecious. Why?

5. Define allelomorphs.

6. DNA in chromosomes also replicates semi-conservatively. How did Taylor and colleagues prove it?

7. Besides converting the milk to curd, which are the two other roles played by LAB?

8. What are baculoviruses?

SECTION-B

9. (i) Very small animals like shrews and humming birds are rarely found in Polar Regions. Why?

   (ii) Define Diapause.

10. Read the graph given below and correlate the uterine events that take place according to the hormonal levels on

(i) 6-15 days
(ii) 16-25 days
(iii) 26-28 days (if ovum is not fertilized)

 CBSE Class 12 Biology Sample Papers 2013 (20) 1

11. Draw the structure of initiator t-RNA molecule. Why is t-RNA called as an adapter molecule?
 
OR
Lactose plays a dual role in the lac-operon. How? Why is lac-operon said to be under negative regulation?
 
12. (a) The graph below represents the growth patterns of two types of aquatic organisms over a brief period of time in a water body surrounded by an agricultural land extensively supplied with fertilisers.
Identify the organisms that would represent (i) A and (ii) B.
(b) State the reason for such a change in the water body and also write the term given toit.

CBSE Class 12 Biology Sample Papers 2013 (20) 2

13. How do Cu 7 or Multiload 375 and Progestasert or LNG-20 differ in their contraceptive action?
 
14. Inbreeding is necessary and useful in some cases. How? Name the problem which can be caused due to close inbreeding and the way to get rid of the problem.
 
15. a-Interferons are helpful in controlling a very fetal disease. Name the disease and ways to detect it. How do the a-interferons help in such cases?
 
16. How is a divalent cation like Calcium useful in making the host cell competent for transformation with rDNA? What is biolistics?
 
17. Approval of which organization is needed for getting a clearance for mass production of a genetically modified organism? What can be the any two possible reasons for the need of such organization?
 
18. IgE antibodies are usually produced in response to certain substances.What are such substances called? What is the condition caused due to such substance and mention the cell and its chemical which causes such condition?


Please refer to attached file for CBSE Class 12 Biology Sample Paper 2013 Solved Set H

How to download CBSE Class 12 Biology Sample Paper 2013 Solved Set H in PDF?

We hope you liked the above provided CBSE Class 12 Biology Sample Paper 2013 Solved Set H. To get an understanding of the type of questions which were asked in exams, it is important for Class 12 students to understand the way sample Paper are set by teachers. Students can download the Sample Paper for Class 12 Biology which will be coming in the exams so that you can practise them and solve all types of questions that can be asked in exams. By doing CBSE Class 12 Biology Sample Paper 2013 Solved Set H you will understand the regular questions and MCQ questions for Class 12 Biology which are always asked. You can download CBSE Class 12 Biology Sample Paper and Class 12 Biology Question Papers in PDF. You should attempt all the last year question paper for Class 12 and Class 12 Biology MCQ Test in examination conditions at home and then compare their answers with the solutions provided by our teachers.

Why should you solve CBSE Class 12 Biology Sample Paper 2013 Solved Set H?

a) This is new Set from Class 12 Biology Sample Papers and has questions which are different from other sets.
b) As you will do more sets and also refer to Class 12 Biology Question Papers, then it will help you understand the type of questions asked in exams.
d) Compare your score of each set to understand your weak areas in Class 12 Biology.
e) Solving this paper which also has MCQ questions for Class 12 Biology will make you faster and better at answering questions.

What should you do after solving CBSE Class 12 Biology Sample Paper 2013 Solved Set H?

a) Check your answers with the solutions given in the downloaded sample paper in PDF of Class 12 Biology.
b) Class 12 students should try to find where you made mistakes and learn from them.
c) If a question was hard, read the concepts in NCERT book for Class 12 Biology and then practice it again to get better.
d) Solve more sets of sample papers for Class 12 Biology to improve even more.

Where can I download CBSE Class 12 Biology Sample Paper 2013 Solved Set H in Pdf

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How can I improve my scores by solving CBSE Class 12 Biology Sample Paper 2013 Solved Set H

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