One statement that is true for all proteins is that they are composed of amino acids linked together by peptide bonds. The sequence and composition of these amino acids determine a protein's unique structure and function. Additionally, all proteins exhibit levels of structure, including primary, secondary, tertiary, and sometimes quaternary structures.
which statement is true for all proteins
3 answers
Among the statements you've provided, the one that is true for all proteins is: "Their structure is related to their function."
This concept is fundamental in biology. The specific sequence of amino acids in a protein determines its three-dimensional structure, which in turn affects how the protein behaves and interacts with other molecules.
The other statements are more specific and not universally applicable to all proteins:
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"They carry oxygen in human blood" - This specifically refers to hemoglobin, a type of protein, but not all proteins have this function.
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"They are created by mutations in DNA" - While mutations can lead to the creation of new proteins or affect existing ones, proteins themselves are not created by mutations; they are synthesized from the genetic code that may be altered through mutations.
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"Their main function is to cause mutations" - This is not accurate; proteins have a wide variety of functions, including catalyzing biochemical reactions (enzymes), signaling, structural roles, and more. Causing mutations is not a primary function of proteins.
So, the first statement is the most universally applicable to all proteins.