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Botany · Class 12 Science

Yanam Bieap Class 12 Botany — Real Previous-Year Papers

with complete answers

Real previous-year board papers, year by year — the official exam pattern, the full question paper, and every question solved the concept-first way. Distinct from the chapter-wise textbook bank.

2018–2026
Years of papers
6
Total Papers
6
Real Board Papers
0
Sample papers
126
Real-paper Q & A
0
Sample-paper Q & A

Real board-paper questions available, by year

21 Q2026complete
—2025Not available
21 Q2024complete
21 Q2023complete
—2022Not available
—2021Not available
21 Q2020complete
21 Q2019complete
21 Q2018complete

BIEAP Intermediate Board 2026 · Set ANNUAL

Real board examination

About this paper

The real Class-12 board examination held in 2026. Every question below is solved the concept-first way. Sample papers are labelled honestly — never shown as a past exam.

Total marks
60
Questions
18
Duration
180 min
Sections
3

The marks / questions / duration above are the official exam pattern. We currently have 21 of this paper’s questions (117% of the full paper), with 21 fully solved. Questions we couldn’t yet extract or verify are held — never shown as complete.

Sections & marks

SectionTypeQuestionsMarks eachTotal
Section ASection Section Asubjective10220
Section BSection Section Bsubjective6424
Section CSection Section Csubjective2816
Total1860

The question paper

The questions we hold for this paper, laid out by section. Solutions are on the Answers tab.

Board Examination

Botany

BIEAP Intermediate Board 2026 · Set ANNUAL

Series/Set: ANNUALRoll No. ________
Time Allowed: 3 hoursMaximum Marks: 60

General Instructions

  1. This question paper contains 18 questions divided into 3 sections — Section A, Section B, Section C.
  2. Section Section A comprises 10 questions of 2 marks each (subjective).
  3. Section Section B comprises 6 questions of 4 marks each (subjective).
  4. Section Section C comprises 2 questions of 8 marks each (subjective).

Above is the official exam pattern. The questions printed below are those we currently hold for this paper.

Section A

Q1.
What are porins? What role do they play in diffusion?
[2]
Q2.
Where does the photolysis of H2O occur? What is its significance?
[2]
Q3.
What are pleomorphic bacteria? Give an example.
[2]
Q4.
What is point mutation? Give an example.
[2]
Q5.
What is meant by charging of tRNA?
[2]
Page 1 of 4
Q6.
Distinguish between heterochromatin and euchromatin. Which of the two is transcriptionally active?
[2]
Q7.
Give one example for each of transgenic plants which are suitable for food processing and those with improved nutritional quality.
[2]
Q8.
What is the full form of PCR? How is it useful in biotechnology?
[2]
Q9.
Why does 'Swiss cheese' have big holes? Name the bacteria responsible for it.
[2]
Q10.
Give two examples of fungi used in SCP production.
[2]
Section B

Q1.
Write briefly about enzyme inhibitors.
[4]
Q2.
Define and explain water potential.
[4]
Page 2 of 4
Q3.
Explain the steps involved in the formation of root nodule.
[4]
Q4.
What are the physiological processes that are regulated by ethylene in plants?
[4]
Q5.
Explain the structure of TMV.
[4]
Q6.
Define and design a test-cross.
[4]
Q7.
What are the differences between DNA and RNA?
[4]
Q8.
Give a brief account of Bt cotton.
[4]
Page 3 of 4
Section C

Q1.
Give an account of glycolysis. Where does it occur? What are the end products? Trace the fate of these products in both aerobic and anaerobic respiration.
[8]
Q2.
Explain briefly the various processes of recombinant DNA technology.
[8]
Q3.
Describe the tissue culture technique and what are the advantages of tissue culture over conventional method of plant breeding in crop improvement programmes?
[8]
Page 4 of 4