No, not every amino acid starts with the prefix "pro." In biology, there are twenty standard amino acids that are the building blocks of proteins, and each has a unique name and set of properties. Only one of these amino acids is named proline, which is abbreviated as "Pro." The names of amino acids often reflect their chemical characteristics or functions but do not follow a uniform prefix system. For example, other amino acids include lysine (Lys), glutamine (Gln), alanine (Ala), and tyrosine (Tyr). The variation in amino acid structures, including their side chains, determines the structure and function of the proteins they compose. Therefore, while the prefix "pro" specifically refers to proline, each amino acid has its own unique identifier that reflects its specific role and characteristics within proteins.

Yes, the liver plays a crucial role in metabolizing amino acids, transforming them into various compounds that the body can use or excrete. Amino acids from dietary proteins are deaminated in the liver, removing their nitrogen-containing amino groups. This process is essential for the synthesis of non-essential amino acids, the generation of energy from amino acids, the production of urea (which is then excreted by the kidneys), and the creation of other important biomolecules like glucose or ketone bodies, depending on the body’s metabolic needs. Thus, the liver’s function is foundational in managing amino acid levels in the bloodstream, supporting overall metabolism, and ensuring toxic byproducts, like ammonia, are safely processed into urea and eliminated from the body.

Yes, cellulose is indeed a key component of the cell wall in plants and is a complex carbohydrate or polysac haride consisting of thousands of glucose units linked together. This polymer provides structural support, helping maintain the plant's shape, and is critical for the plant's overall strength and rigidity. Its chain-like structure enables the cellulose fibers to bundle together, forming microfibrils that are incredibly strong and resistant to tearing or stretching. This attribute of cellulose is vital for the growth and stability of plants, allowing them to reach upwards towards the light while rooted in the ground. In the broader ecological context, cellulose is significant not only for plant structure but also as a crucial component in the global carbon cycle. It represents the most abundant organic polymer on Earth, playing a pivotal role in the planet's biomass and carbon storage. Additionally, cellulose has numerous applications in various industries, including textiles, paper production, and increasingly as a source of biofuel.