Question

Which type of collagen represents 90% to 95% of the collagen in ECM and forms fibrils and fibres interwines with proteoglycan aggregates?

• A. Type II
• B. Type I
• C. Type IX and X
• D. Type L

Hint:

Type I collagen is the most abundant collagen in connective tissues and is crucial for the tensile strength of tissues such as skin, tendons, and bones.

Answer 1

The Correct Option is B

- Type I collagen forms fibrils and fibers and is the most abundant type of collagen found in the extracellular matrix (ECM). It is mainly responsible for the structural integrity of tissues. 
- Type II collagen is mainly found in cartilage. 
- Type IX and X collagens are also involved in cartilage, but they do not represent the major collagen type in ECM. 
- Type L collagen is less commonly discussed in ECM contexts. 
Conclusion: 
Type I collagen represents the most abundant collagen in ECM, making it the correct answer.