ISC Class 12 Semester 1 Biology Answer Key 2021-22 (Available) – Download PDF & Check Analysis

Updated On: December 03, 2021 05:20 pm IST

ISC Class 12 Semester 1 Biology Exam 2021-22 has been conducted on December 3. Download the PDF of the answer key and check the detailed analysis of Semester 1 Biology.

ISC Class 12 Semester 1 Exams 2021-22 are underway, and the Biology exam has been conducted on December 3 from 2:00 PM to 3:30 PM. The question paper of Biology consists of 70 MCQs for 70 marks. The question paper consists of direct MCQs, assertion, match the following and comprehension-type questions. There is no internal choice, and the students are required to answer all the questions. On this page, you can download the PDF of the Semester 1 Biology answer key along with the detailed question paper analysis.

ISC Class 12 Semester 1 Biology Answer Key 2021-22

The PDF of ISC Class 12 Semester 1 Biology answer key 2021-22 has been updated. You can check the question-wise answers in the table below –

1 - A (The Inducer)	21 - B (Heterogeneous nuclear Ribonucleic acid)	41 - C (Assertion is true but the reason is false)
2 - B (Hershey and Chase)	22 - A (Intrauterine contraceptive device)	42 - C (Assertion is true but the reason is false)
3 - D (UAA, UAG, UGA)	23 - C (Ernst Haeckel)	43 - A (Both assertion and reason are true, and the reason is the correct explanation of the assertion)
4 - B (50%)	24 - D (Henking)	44 - C (Assertion is true but the reason is false)
5 - A (Test Cross)	25 - C (Senescence)	45 - C (Assertion is true but the reason is false.)
6 - D (Birds)	26 - B (Special proteins)	46 - 1 - A (Leading strand) 2 - C (DNA ligase) 3 - D (Semi-discontinuous) 4 - C (Okazaki fragments) 5 - C (cause the polymerisation of the complementary daughter strand)
7 - C (Four Months)	27 - A (Ovary to the uterus)	47 - 1 - A (Spermatogonia) 2 - C (FSH and LH) 3 - B (P-primary spermatocytes, R- spermatids) 4 - A (Mitochondria) 5 - B (At the onset of puberty)
8 - A (Frog)	28 - B (16)	48 - 1 - B (Municipal wastewater) 2 - A (mechanical removal of grit) 3 - C (Masses of bacteria associated with fungal filaments) 4 - B (Decreases) 5 - D (Methane)
9 - C (100)	29 - C (Progesterone)	49 - 1 - A (Assisted reproductive technology) 2 - C (Fertilization of the ovum with sperms in a petri dish) 3 - A (ZIFT) 4 - A (Irregular or no ovulation) 5 - D (It does not need hospitalisation)
10 - A (57)	30 - C (Klinefelter’s syndrome)	50 - 1 - A (A symbol of a square and a circle joined by a horizontal line) 2 - B (Recessive trait) 3 - D (An X-linked recessive trait) 4 - A (Autosomal dominant) 5 - B (Autosomal recessive trait)
11 - B (Pectocellulose)	31 - B (3 billion)	-
12 - A (Zona pellucida)	32 - C (Gene flow)	-
13 - D (In spermiogenesis, spermatozoa are formed; while in spermiation, spermatozoa are released from the Sertoli cells)	33 - B (Saccharomyces cerevisiae)	-
14 - B (Amniocentesis)	34 - C (Mycorrhiza)	-
15 - D (Cervical cap)	35 - D (Perisperm represents the persistent endosperm)	-
16 - D (Streptokinase)	36 - C (Use and disuse of organs)	-
17 - B (Dragonfly)	37 - C (A – (ii), B – (iii), C – (i), D – (iv))	-
18 - C (2pq)	38 - D (A – (iii), B – (i), C – (ii))	-
19 - A (small isolated population)	39 - D (Apes)	-
20 - D (Eyelids)	40 - A (Ladybird beetles)	-

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ISC Class 12 Semester 1 Biology Question Paper Analysis 2021-22

You can check the ISC Class 12 Semester 1 Biology question paper analysis in the table below. You can also share your feedback by clicking on the link below –

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Aspect	Analysis
Overall Difficulty Level	Moderate to Easy
Difficulty Level of Assertion Questions	Moderate to Difficult
Expected Average No. of Good Attempts	35+
Expecetd No. of Very Good Attempts	55+
Was the Paper Time-Consuming?	No