CBSE Academic Class XII Biology Sample Question Paper 2022-23
Name of the Board : Central Board of Secondary Education (CBSE)
Class : XII STD
Document Type : Sample Question Paper
Subject : Biology
Year : 2022-23
Website : https://cbseacademic.nic.in/SQP_CLASSXII_2022-23.html
CBSE XII Biology Sample Question Paper
CBSE Students can download the Biology Sample Question Paper for the year 2022-23 from the website of CBSE Academic.
Related / Similar Question Paper : CBSE Academic Class XII Biotechnology Sample Question Paper 2022-23
CBSE Biology Sample Question Paper
SECTION – A
1. An infertile couple was advised to undergo In vitro fertilization by the doctor. Out of the options given below, select the correct stage for transfer to the fallopian tube for successful results?
(a) Zygote only
(b) Zygote or early embryo upto 8 blastomeres
(c) Embryos with more than 8 blastomeres
(d) Blastocyst Stage
3 Which of the following amino acid residues will constitute the his tone core?
(a) Lysine and Arginine
(b) Asparagine and Arginine
(c) Glutamine and Lysine
(d) Asparagine and Glutamine
4 Evolutionary convergence is development of a
(a) common set of functions in groups of different ancestry.
(b) dissimilar set of functions in closely related groups.
(c) common set of structures in closely related groups.
(d) dissimilar set of functions in unrelated groups
6. Interferons are most effective in making non-infected cells resistant against the
spread of which of the following diseases in humans?
(a) ascariasis
(b) ringworm
(c) amoebiasis
(d) AIDS
10. Sea Anemone gets attached to the surface of the hermit crab. The kind of population interaction exhibited in this case is
(a) amensalism.
(b) commensalism.
(c) mutualism.
(d) parasitism
12 Which of the following is an example of ex situ conservation?
(a) Sacred Groves
(b) National Park
(c) Biosphere Reserve
(d) Seed Bank
Question No. 13 to 16 consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true and R is not the correct explanation of A.
C. A is true but R is false.
D. A is False but R is true.
13. Assertion: Apomictic embryos are genetically identical to the parent plant.
Reason: Apomixis is the production of seeds without fertilization.
14. Assertion: When white eyed, yellow bodied Drosophila females were hybridized with red eyed, brown-bodied males; and F1 progeny was intercrossed, F2 ratio deviated from 9 : 3 : 3 : 1.
Reason: When two genes in a dihybrid are on the same chromosome, the proportion of parental gene combinations is much higher than the non-parental type.
15. Assertion: Functional ADA cDNA genes must be inserted in the lymphocytes at the early embryonic stage.
Reason: Cells in the embryonic stage are mortal, differentiated and easy to manipulate.
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