CBSE Class 12 Biology Board Paper Term 1 - 2021 (Set 4)
This is the CBSE Class 12 Biology Board Paper for Term 1, conducted in 2021, Set 4. The paper is designed for a duration of 90 minutes and carries a total of 35 marks. It comprises 60 questions, out of which students are required to attempt any 50. The question paper is divided into three sections: Section A, Section B, and Section C. Section A contains 24 questions, and students need to attempt any 20. Section B also has 24 questions, with a requirement to attempt any 20. Section C consists of 12 questions, and students must attempt any 10. All questions are Multiple Choice Questions (MCQs) and carry equal marks, with no negative marking. Solving this previous year's question paper is crucial for students to understand the exam pattern, question types, and marking scheme, thereby enhancing their preparation and performance in the board examinations.
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Quick info
| Board | CBSE |
|---|---|
| Class | 12 |
| Subject | Biology |
| Session | 2021 |
| Language | English |
| Type | Previous Year Question Paper |
| Exam type | Board Exam |
Paper pattern
The paper has 60 questions, with 50 to be attempted in 90 minutes, totaling 35 marks. It is divided into Sections A, B, and C, with specific attempt requirements for each.
Topics covered
Paper topics
- Angiospermic ovule
- Anther wall layers
- Seed dormancy
- Apomictic embryo
- Embryo sac
Important topics
- Ovule structure
- Anther development
- Reproductive biology
- Plant reproduction
PDF preview
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Question paper text
Series SSJ/2-Set 4
CBSE Board Class XII Biology Board Paper Term 1 - 2021
Time: 90 minutes
Total Marks: 35
General Instructions:
Read the following instructions very carefully and strictly follow them:
- This question paper contains 60 questions out of which 50 questions are to be attempted. All questions carry equal marks.
- The questions paper consists three Sections - Section A, B and C.
- Section - A contains 24 questions. Attempt any 20 questions from Ques. No. 1 to 24.
- Section - B contains 24 questions. Attempt any 20 questions from Ques. No. 25 to 48.
- Section - C contains 12 questions. Attempt any 10 questions from Ques. No, 49 to 60
- There is only one correct option for every Multiple Choice Questions (MCQs). Marks will not be awarded for answering more than one option.
- There is not any negative marking.
SECTION-A
Section – A consists of 24 questions. Attempt any 20 questions from this section.
The first attempted 20 questions would be evaluated.
Question 1.
The hilum in a typical angiospermic ovule represents the junction between -
- Integuments and the embryo sac
- Embryo sac and the nucellus
- Body of the ovule and the funicle
- Nucellus and the funicle
Question 2.
In the given diagram of a transverse section of a young anther. Choose the labellings showing correct placement of the wall layers from the table given below:
(iii)
- (iv)
(1)
- (ii) (iv)
- Epidermis Middle layers Endothecium
- Tapetum Endothecium Middle layers
- Endothecium Tapetum Epidermis
- Middle layers Epidermis Tapetum
Question 3.
The term used for the embryo entering into the state of inactivity as the seed mature is -
- Quiescent
- Parthenogenesis
- Parthenocarpy
- Dormancy
Question 4.
The ploidy of the apomictic embryo developed from the integument cells and megaspore mother cell without reduction division respectively will be -
- 2n and 2n
- n and n
- 2n and n
- 3n and 2n
Question 5.
Given below is a diagrammatic representation of a mature embryo sac of a typical angiosperm plant. Choose the option showing the correct labelling for the parts W, X, Y and Z from the table given below. (X)
THE PERSON NAMED IN (Z) (Y)
(W)
Frequently asked questions
What is this document?
This is the CBSE Class 12 Biology Previous Year Question Paper for Term 1, 2021, Set 4.
What is the total marks and time duration for this paper?
The paper has a total of 35 marks and a time duration of 90 minutes.
How many questions are there and how many need to be attempted?
There are 60 questions in total, and students need to attempt any 50 questions.
What are the sections in this Biology question paper?
The paper is divided into three sections: Section A, Section B, and Section C, each with a specific number of questions to attempt.
How does solving this previous year question paper help students?
Solving previous year question papers helps students understand the board pattern, question types, and marking scheme, improving their exam preparation and confidence.
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