In CBSE Class 12 Biology Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.
Here, we have provided case based/passage based questions for Class 12 Biology Chapter 3 Human Reproduction.
| CBSE Class 12 | Biology |
|---|---|
| Term | 1 |
| Units | Unit VI Reproduction |
| Chapter | 3 |
| Name of Chapter | Human Reproduction |
| Question Type | Case Study and Passage Based |
| Syllabus | Male and female reproductive systems; microscopic anatomy of testis and ovary; gametogenesis – spermatogenesis and oogenesis; menstrual cycle; fertilisation, embryo development upto blastocyst formation, implantation; pregnancy and placenta formation (elementary idea); parturition (elementary idea); lactation (elementary idea). |
Case Study/Passage Based Questions for Class 12 Biology
Question 1:
Spermatogenesis is the production of sperms from male germ cells (spermatogonia) inside the testes (seminiferous tubule). This process begin at puberty. Observe the following flow diagram and answer the questions that follows-
(i) This happens during spermatogenesis
(a) Meiosis
(b) Mitosis
(c) Meiosis and mitosis
(d) None of these
Answer
Answer: (c)(ii) The process of spermatogenesis is induced by
(a) TSH
(b) FSH
(c) MSH
(d) ACTH
Answer
Answer: (b)(iii) The number of spermatozoa, a single primary spermatocyte finally produced in spermatogenesis is
(a) 2
(b) 4
(c) 6
(d) 8
Answer
Answer: (b)(iv) In spermatogenesis, the phases of maturation involve
(a) formation of spermatids from primary spermatocyte through meiosis
(b) growth of spermatogonia into primary spermatocytes
(c) formation of spermatogonia from gonocytes through mitosis
(d) formation of oogonia from spermatocyte through meiosis
Answer
Answer: (a)(v) The correct sequence of cell stage in spermatogenesis is
(a) spermatocyte → spermatids → spermatogonia → spermatozoa
(b) spermatogonia → spermatids → spermatocyte → spermatozoa
(c) spermatocytes → spermatogonia → spermatid → spermatozoa
(d) spermatogonia → spermatocytes→ spermatids → spermatozoa
Answer
Answer: (d)You may also like:
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