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WBJEE Biology (Descriptive) - Previous Year Paper, 2011 | WBJEE Sample Papers, Section Wise & Full Mock Tests 2025 PDF Download

Q1. What are poikilothermic animals?
A. The body temperature of poikilothermic animals (cold blooded animals) changes according to environmental temperature.
Example are invertebrates, fishes, amphibians and reptiles.

Q2. Write two functions of juxtaglomerular apparatus.
A. The Juxta glomerular apparatus (JGA) possesses  Juxta glomerular cells and Macula densa. The Juxta glomerular cells secrete renin which regulates RAAS mechanism. Macula densa responds to the change in the mineral ion concentration of glomerular filtrate.

Q3. State two differences between red and white muscles.
A.  

Red Muscle

White Muscle

1. Myoglobin present

Myoglobin absent

2. Slow fatigue muscle

Fast fatigue muscle

3. Mitochondria more in number 

Mitochondria less in number

4. Sarcoplasmic reticulum less in number

Sarcoplasmic reticulum morein number

 

Q4. What is the difference between pinocytosis and phagocytosis?
A. 

Pinocytosis

Phagocytosis

It is "Cell drinking" pheno­menon where bulk intake of extracellular fluid with the help of vesicle called pinosome takes place.

It is a "Cell eating" phenome­non where bulk intake of solid material from outside to inside of a cell takes place with the help of phagosome.

 

Q5. State four important functions of plasma membrane.
A. Four important functions of plasma membrane are :
(i) Involved in active and passive transport
(ii) Involved in a variety of cellular processess such as cell adhesion, ion conductivity & cell signalling.
(iii) As a cell envelope it contain the protoplasm thus protective in nature.
(iv) In prokaryotes, plasma membrane is the site of E.T.S.

Q6. What is bioaccumulation?
A. Bioaccumulation is the accumulation of toxic substance at a rate greater than at which the substance is lost by an organism.
Longer the biological half life of the accumulated substance, greater is the risk of bioaccumulation.

Q7. What is a test cross? Why is it so named?
A. Test cross is a cross between F1 hybrid and homozygous recessive parent.
Test cross is so named as it determines whether the individual with dominant phenotype is homozygous dominant or heterozygous dominant.

Q8. What is ribozyme?
A. A ribozyme is a RNA molecule possessing a well defined tertiary structure that enables it to catalyse a chemical reaction eg. 23S  rRNA   (peptidyl transferase).

Q9. What are mycorrhizae?
A. Mycorrhizae is a symbiotic association between roots of higher plants and fungi.
It plays a key role in mineral absorption specially phosphate.

Q10. Write down the scientific name of China rose plant. Give its floral formula.
A. Scientific name of China rose is Hibiscus rosa - sinensis

WBJEE Biology (Descriptive) - Previous Year Paper, 2011 | WBJEE Sample Papers, Section Wise & Full Mock Tests 2025

 

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FAQs on WBJEE Biology (Descriptive) - Previous Year Paper, 2011 - WBJEE Sample Papers, Section Wise & Full Mock Tests 2025

1. What is the pattern of the WBJEE Biology (Descriptive) exam?
Ans. The WBJEE Biology (Descriptive) exam follows a pattern where students are required to write detailed answers to the given questions. It tests the students' understanding and knowledge of various biological concepts and requires them to provide comprehensive explanations.
2. How can I prepare for the WBJEE Biology (Descriptive) exam effectively?
Ans. To prepare for the WBJEE Biology (Descriptive) exam effectively, it is important to focus on understanding the concepts thoroughly. Practice writing detailed answers to previous year papers and sample questions to improve your descriptive writing skills. Additionally, make use of textbooks, reference books, and online resources to enhance your knowledge and understanding of the subject.
3. What are some important topics that I should prioritize while preparing for the WBJEE Biology (Descriptive) exam?
Ans. Some important topics that should be prioritized while preparing for the WBJEE Biology (Descriptive) exam include cell biology, genetics, ecology, human physiology, plant physiology, and biotechnology. These topics are usually covered extensively in the exam, and having a strong understanding of them will help you tackle the questions effectively.
4. Are there any specific guidelines for answering the descriptive questions in the WBJEE Biology exam?
Ans. Yes, there are specific guidelines for answering the descriptive questions in the WBJEE Biology exam. It is important to read the question carefully and understand what is being asked. Structure your answer in a logical and coherent manner, providing relevant points and explanations. Use diagrams, flowcharts, and labeling whenever necessary to enhance the clarity of your answer. Additionally, pay attention to the word limit mentioned for each question.
5. Are there any recommended resources or study materials for the WBJEE Biology (Descriptive) exam?
Ans. Yes, there are several recommended resources and study materials for the WBJEE Biology (Descriptive) exam. Some popular books for WBJEE Biology preparation include NCERT Biology textbooks, Trueman's Biology (Vol. 1 and 2), and Objective Biology by Dinesh. Online platforms such as Khan Academy and Biology Online also offer comprehensive study materials and practice questions to aid your preparation.
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Document Description: WBJEE Biology (Descriptive) - Previous Year Paper, 2011 for JEE 2024 is part of WBJEE Sample Papers, Section Wise & Full Mock Tests 2025 preparation. The notes and questions for WBJEE Biology (Descriptive) - Previous Year Paper, 2011 have been prepared according to the JEE exam syllabus. Information about WBJEE Biology (Descriptive) - Previous Year Paper, 2011 covers topics like and WBJEE Biology (Descriptive) - Previous Year Paper, 2011 Example, for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for WBJEE Biology (Descriptive) - Previous Year Paper, 2011.
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