Statement 1 is correct. The cell wall of most bacteria is primarily composed of peptidoglycan, a polymer consisting of sugars and amino acids, which provides structural support and protection. Statement 2 is incorrect. Fungal cell walls are mainly composed of chitin, a tough polysaccharide, although other components like glucans are also present. Plant cell walls are made of cellulose. Statement 3 is correct. Animal cells do not possess a rigid cell wall. Instead, animal tissues have an extracellular matrix (ECM) which is a complex network of secreted molecules, including various proteins (like collagen, elastin) and glycoproteins (like proteoglycans, which are composed of protein and carbohydrate chains), providing support, adhesion, and signaling functions.
Consider the following statements regarding cell wall composition : Bacterial cell wall is made of peptidoglycan. Fungal cell wall is made of cellulose. Animals lack cell wall and have extracellular matrix made up of sugar and proteins. Select the correct answer using the code given below :
Asked in UPSC NDA 1 2023 · Topic: Cell (Cell Wall: Structure and Functions (in plants, fungi, and bacteria))
More Biology questions
- Which one of the following statements about animal cells and plant cells is correct?
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- The plant cell lacking a cell wall is
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