CBSE Class 12 Biology Sample Papers 2011 Set B

Read and download PDF of CBSE Class 12 Biology Sample Papers 2011 Set B 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 Papers 2011 Set B

Biology Class 12 Sample Paper

Section - A

1. Coconut palm is monocious while date palm is dioecious. Why are they called so?

2. The meiocyte of an onion plant contains 32 chromosomes. Workout the number of chromosomes found in its endosperm.

3. The gene I that controls the ABO blood grouping in human beings has three alleles IA, IB and i.

(a) How many different genotypes are likely to be present in the human population?

(b) Also, how many phenotypes are possibly present?

4. Pick out the ancestral line of Cycads from the list given below - Ferns, herbaceous lycopods, seed ferns, and horsetails

5. Name the source of smack. Mention one way in which it affects the human body.

6. How is alien DNA introduced into in plant cell?

7. Mr. Galgotia eats curd / yoghurt. In this case, which trophic level will he occupy?

8. How is population density of tiger measured?

Section - B

9.
CBSE Class 12 Biology Sample Paper SA1 2014 1
Identify the type of flower shown in A and B. Which out of this two will produce an assured seed set?.
 
10. Fed up of a large family, a couple wanted to adopt a terminal method of contraception. Describe the process conducted by the doctor in either of the cases (male / female partner)
 
OR
A mother of a one year old daughter wanted to space her second child. Her doctor suggested CuT. Explain its contraceptive actions.
 
11. The human male and female bird are heterogametic while the human female and male bird are homogametic. Why are they called so?
 
12. What are interferons? Explain its role in providing immunity. Also name the kind of immunity provided by it.
 
13. What is allergy? Name the antibody responsible for it. Also mention two chemicals released from the mast cells during an allergic reaction.
 
14. Give reason -
(a) Bottled fruit juices bought from the market are clearer as compared to those made at home.
(b) Large holes are found in “Swiss cheese”.
 
15. In which parts of the body of the hosts do the following events in the life cycle of Plasmodium take place? Along with the body parts name the hosts too -
(i) Fetilisation
(ii) Development of gametocytes
(iii) Release of sporozoites
(iv) Asexual reproduction
 
16. What are the latest methods of detection of cancer?
 
17. State two important defense mechanisms in plants against herbivore, with an example each.
 
18. Compare the grazing food chain and detritus food chain in the aspect of their (a) origin and
(b) energy status.
 
Section - C
 
19. Draw a labeled diagram of the sectional view of a mature pollen grain of angiosperms. Explain the function of any two of its parts.
 
20. In a pea plant, smooth seed coat is dominant over wrinkled seed coat. What will be the expected ratio of phenotypes of the offspring in a cross between
(i) Heterozygous smooth × Heterozygous smooth (ii)
Heterozygous smooth × Homozygous wrinkled (iii)
Heterozygous smooth × Homozygous smooth?
 
21. A tRNA is charged with aminoacid methionine
(i) Name the process involved in the attachment
(ii) Point out the mRNA codon and anticodon on tRNA for this aminoacid.
(iii) What is heterochromatin?
 
22. (a) State Hardy Weinberg principle. Name any two factors which affect it.
(b) Draw a graph to show that natural selection leads to directional change.



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CBSE Class 12 Biology Sample Papers 2011 Set B

We hope you liked the above provided CBSE Class 12 Biology Sample Papers 2011 Set B. 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 Papers 2011 Set B 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.

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