(Download) CBSE Class-12 Sample Paper 2022-23 : Biology
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(Download) CBSE Class-12 Sample Paper 2022-23 : Biology
Sample Question Paper (Term-1) 2022-23
Subject Name : Biology
Subject Code : 044
Time Allowed: 90
Minutes Maximum Marks: 40
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
2. Given below are four contraceptive methods and their modes of action. Select the correct match:
| S. No | Method | S. No | Mode of action |
| a) | Condom | (i) | Ovum not able to reach Fallopian tube |
| b) | Vasectomy | (ii) | Prevents ovulation |
| c) | Pill | (iii) | Prevents sperm reaching the cervix |
| d) | Tubectomy | (iv) | Semen contains no sperms |
(a) a)–(i) b)–(ii) c)– (iii) d)–(iv)
(b) a)–(ii) b)–(iii) c)–(iii) d) – (i)
(c) a)–(iii) b)–(iv) c)–(ii) d)–(i)
(d) a)–(iv) b)–(i) c)– (iii) d)–(ii)
3 Which of the following amino acid residues will constitute the histone 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.
