It is very important for CBSE Class 11 students to check their preparedness before appearing for annual board exams. Students can easily do this with the help of the CBSE sample papers based on the latest pattern and syllabus. Here, students will get the CBSE Class 11 Biology solved sample paper for annual exam 2019. The sample paper is based on the latest CBSE Class 11 Biology syllabus. The design of class 11 sample paper is exactly similar to that followed in previous years question papers of CBSE Class 11. Questions are included from each and every chapter. Students must solve this sample paper in order to know the pattern and difficulty level of the upcoming annual exams 2019. Solutions are also provided in a very clear and detailed manner for all questions.
Why should students solve CBSE Class 11 Sample Paper?
1. To get familiar with the pattern and difficulty level of the exam.
2. To learn new ways of managing speed and accuracy in the examination.
3. To brush up their knowledge.
1. All the questions are compulsory.
2. The questions paper consists of 29 questions divided into 4 sections A, B, C and D.
3. Section A comprises of 4 questions of 1 mark each. Section B comprises of 8 questions of 2 marks each. Section C comprises of 11 questions of 4 marks each. Section D comprises of 6 questions of 6 marks each.
4. There is no overall choice. However, an internal choice has been provided in section C and D. You have to attempt only one of the alternatives in all such questions.
Some questions from CBSE Class 11 Biology Sample Paper are given below:
State the location and function of Intercalary meristem.
It is the meristem that occurs between the masses of mature tissues. It occurs in grasses and helps in the regeneration of grasses after they have been grazed by herbivores. Since the intercalary meristem and the apical meristem both appear earlier in a plant’s life and contribute to the formation of the primary plant body, so they constitute the primary meristem.
What are respiratory substrates? Name the most common respiratory substrate.
In the process of respiration, those compounds which get oxidised to release energy are called respiratory substrates. The most common respiratory substrate is glucose.
Which hormone deficiency is responsible for the following?
(a) Diabetes mellitus
(a) Diabetes mellitus is characterized by abnormally high glucose levels in the blood due to the deficiency of hormone, called insulin.
(b) Goitre is characterised by an abnormal enlargement of the thyroid gland due to the deficiency of thyroxin hormone in the body.
What is the difference between direct and indirect development?
Direct development: When the life cycle of an adult individual lacks any larval stage in its life cycle, then it is termed as direct development. In this case the adults give rise to young ones which directly develop into the adult, e.g., mammals.
Indirect development: In this type of development, the adult individual gives rise to eggs which develop into the adult after passing through several larval stages, e.g., echinoderms, cockroaches etc.
Explain with suitable examples the different types of phyllotaxy?
Phyllotaxy refers to the pattern or arrangement of leaves on the stem or branch of a plant. There are three types of phyllotaxy which are described as below:
(i) Alternate phyllotaxy: In this type of phyllotaxy, a single leaf arises from each node of a branch in alternate manner. For example: Sunflower, mustard, and China rose.
(ii) Opposite phyllotaxy: Plants with opposite phyllotaxy have a pair of leaves arising from each node and both lie in opposite direction to each other. For example: Guava and jamun plants.
(iii) Whorled phyllotaxy: In this type of phyllotaxy, more than two leaves arise from each node forming a whorl. For example: Alstonia.
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