Proteins have four levels of structure. The primary structure is A) linear sequence of amino acid residues in the polymer chain B) the three-dimensional form of local segments of proteins C) the three-dimensional form of the whole protein D) the number and arrangement of multiple protein subunits in a large protein complex
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This is the most basic level of protein structure and it simply refers to the sequence of amino acids that make up the protein. The other options refer to the higher levels of protein structure. Show more…
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Which of the four levels of protein structure is most closely associated with the sequence of amino acids in a protein?
Proteins are organic molecules that form muscles, transport O2 (hemoglobin), and act as hormones and enzymes. Most importantly, proteins determine how our bodies look and function. Their building block is the amino acid. Proteins are made of amino acids combined through a dehydration link called a peptide bond. When groups of amino acids are joined together, a protein is formed. 1. What are 2 of the functions of proteins? a. b. 2. What is the building block of proteins? 3. What is the name of the bond that joins amino acids? There are about 20 different kinds of amino acids. These amino acids consist of five separate parts. The first is a central carbon atom. Second is a carboxyl group (-COOH). Third is an amino group (-NH2). Fourth is a hydrogen. The fifth group is a variable 'R' group. The only difference in the 20 kinds of amino acids is the "R" group. Some "R" groups are very small, others are large, and even others form chains and rings. The sequence and shapes of the "R" groups control the shape and function of the protein. 4. How many different amino acids are there? 5. What part of the amino acid varies from one amino acid to another? 6. What determines the shape and function of a protein?
Josee P.
Each description below at left represents a possible major basis for a particular level of protein structure. Match each of these descriptions with the correct protein structural level, by selecting from the drop-down menus (not all options will be used, but those that are will be used only once): [ Choose ] quaternary structure secondary structure tertiary structure resonance within the peptide group presence of residues with aliphatic and aromatic side chains in the primary sequence of a single polypeptide
Dominador T.
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