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 Chapter8 Case Study and Passage Based Questions with Answers were Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Biology Cell : The Unit of Life 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.

Cell: The Unit of Life Case Study Questions With Answers

Here, we have provided case-based/passage-based questions for Class 11 Biology Chapter 8 Cell : The Unit of Life

Case Study/Passage-Based Questions

Case Study 1:

The prokaryotic cells are represented by bacteria, blue-green algae, mycoplasma and PPLO (Pleuro Pneumonia like Organisms). They are generally smaller and multiply more rapidly than the eukaryotic cells. They may vary greatly in shape and size. The four basic shapes of bacteria are bacillus (rod like), coccus (spherical), vibrio (comma shaped) and spirillum (spiral).

The organisation of the prokaryotic cell is fundamentally similar even though prokaryotes exhibit a wide variety of shapes and functions. All prokaryotes have a cell wall surrounding the cell membrane except in mycoplasma. The fluid matrix filling the cell is the cytoplasm. There is no well-defined nucleus. The genetic material is basically naked, not enveloped by a nuclear membrane. In addition to the genomic DNA (the single chromosome/circular DNA), many bacteria have small circular DNA outside the genomic DNA. These smaller DNA are called plasmids. The plasmid DNA confers certain unique phenotypic characters to such bacteria. One such character is resistance to antibiotics. Nuclear membrane is found in eukaryotes. No organelles, like the ones in eukaryotes, are found in prokaryotic cells except for ribosomes. Prokaryotes have something unique in the form of inclusions. A specialised differentiated form of cell membrane called mesosome is the characteristic of prokaryotes. They are essentially infoldings of cell membrane.

1.) ______________ is the fluid matrix, which fills the prokaryotic cell.

• a.) Cell sap
• b) Cytoplasm
• c.) Water
• d.) Both a & b

Ans:b) Cytoplasm

2.) Identify incorrect statement

Statement 1 – In prokaryotic cell nucleus is absent.

Statement 2 – In prokaryotic cells genetic material appears naked.

Statement 3 – In prokaryotic cells genetic material not enveloped by a nuclear membrane.

Statement 4 – prokaryotic cells do not have a cell wall.

• a.) Only 1
• b) Only 4
• c.) Both 2 & 3
• d.) All of the above

Ans: b) Only 4

3.) Give reason – why genetic material in prokaryotic cell is not enveloped in nuclear membrane?

Ans: In prokaryotic cell well-defined nucleus is absent. Hence all genetic material appears naked and not enveloped by a nuclear membrane.

4.) Define mesosome.

Ans:Mesosome – A specialised differentiated form of cell membrane called mesosome is the characteristic of prokaryotes. They are essentially infoldings of cell membrane

5.) Give the any two characteristic of prokaryotic cells.

Ans: Characteristic of prokaryotic cells;

• There is no well-defined nucleus.
• The genetic material is basically naked, not enveloped by a nuclear membrane.
• Cellulose is the fluid matrix, which fills the prokaryotic cell.
• The prokaryotic cells are generally smaller and multiply more rapidly than the eukaryotic cells.
• All prokaryotes have a cell wall surrounding the cell membrane except in mycoplasma.

6.) Enlist the shapes of bacteria are generally occurs.

Ans: The four basic shapes of bacteria are bacillus (rod like), coccus (spherical), vibrio (comma shaped) and spirillum (spiral).

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