A Level Biology Practice Exam

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What is a characteristic of the process of ossification?

It is a natural process without any external factors
It occurs only in infants
It involves the deposition of calcium phosphate
It exclusively affects connective tissues

The correct answer is: It involves the deposition of calcium phosphate

The process of ossification is characterized by the deposition of calcium phosphate, which is critical for the formation of bone. During this process, bone tissue develops as osteoblasts produce the organic matrix of the bone, and subsequently, calcium phosphate crystals form within this matrix, providing hardness and structure. This mineralization is essential for the strength and rigidity of bones, allowing them to support the body and protect vital organs. This characteristic of ossification highlights its role in both the initial formation of bones and in the ongoing remodeling and repair of skeletal tissue throughout an individual's life. It is particularly significant during growth and development, where the need for new bone tissue is high.