In Class 11 Final Exams there will be Case studies and Passage Based Questions will be asked, So practice these types of questions. Study Rate is always there to help you. Free PDF Download of CBSE Class 11 Biology Chapter 9 Case Study and Passage Based Questions with Answers were Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Biology Biomolecules to know their preparation level.

In CBSE Class 11 Biology Paper, There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Biomolecules Case Study Questions With Answers

Here, we have provided case-based/passage-based questions for Class 11 Biology Chapter 9 Biomolecules

Case Study/Passage-Based Questions

Case Study 1:

Almost all enzymes are proteins. There are some nucleic acids that behave like enzymes. These are called ribozymes. An enzyme like any protein has a primary structure, i.e., amino acid sequence of the protein. An enzyme like any protein has the secondary and the tertiary structure. When you look at a tertiary structure you will notice that the backbone of the protein chain folds upon itself, the chain criss-crosses itself and hence, many crevices or pockets are made. One such pocket is the ‘active site’. An active site of an enzyme is a crevice or pocket into which the substrate fits. Thus enzymes, through their active site, catalyse reactions at a high rate. Enzyme catalysts differ from inorganic catalysts in many ways, but one major difference needs mention. Inorganic catalysts work efficiently at high temperatures and high pressures, while enzymes get damaged at high temperatures (say above 40°C). However, enzymes isolated from organisms who normally live under extremely high temperatures (e.g., hot vents and sulphur springs), are stable and retain their catalytic power even at high temperatures (upto 80°-90°C). Thermal stability is thus an important quality of such enzymes isolated from thermophilic organisms.

1.) _____________ is the pocket like region of an enzyme into which substrate molecules bind.

• a) Protein site
• b) Co-factors
• c) Coenzyme
• d) Active site

Ans: d) Active site

2.) Identify incorrect statement

Statement 1 – Nucleic acids which behave like enzymes are commonly termed as nucliozymes.

Statement 2 – An enzyme like any protein has a primary, secondary and the tertiary structure.

Statement 3 – Enzyme catalysts differ from inorganic catalysts in many ways.

Statement 4 – All enzymes are proteins.

• a.) Only 1
• b) Both 1 & 3
• c) Only 3
• d.) None of the above

Ans: a.) Only 1

3.) How active site of enzymes are formed?

Ans: Enzyme have primary, secondary and tertiary structure like proteins. In tertiary structure, backbone of the protein chain folds upon itself, the chain criss-crosses itself and leads to the formation of many crevices or pockets are made. These pockets are referred as active site of enzyme. An active site of an enzyme is a crevice or pocket into which the substrate fits.

4.) Explain how Enzyme catalysts differ from inorganic catalysts?

Ans: Enzyme catalysts differ from inorganic catalysts in many ways. Inorganic catalysts work efficiently at high temperatures and high pressures, while enzymes get damaged at high temperatures (above 40°C). There are some exceptions such as enzyme isolated from thermophilic organisms.

5.) What is ribozymes?

Ans: There are some nucleic acid behave like an enzymes, these nucleic acid is termed as ribozymes.

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