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

Sakunth Kumar
Sakunth KumarUpdated On: December 03, 2021

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 Biology Answer Key 2021-22 – Download PDF & Check Analysis

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 Answer Key 2021-22 (All Subjects)

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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 –

Click Here to Share Your Feedback on Biology Exam

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 Attempts55+

Was the Paper Time-Consuming?

No

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For the latest ISC Class 12 exams news & updates, keep visiting the CollegeDekho news section.

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