Biology, 14.11.2019 23:31 shelbycg02
Your body contains tens of thousands of different proteins, each with a specific structure and function. the unique shape of each of these diverse proteins is based on several superimposed levels of structure. which of the following statements is true?
a. the primary structure of a protein is the order of nucleic acids in a polypeptide.
b. the 20 amino acids found in proteins differ in the composition of their r groups, which may be either polar or charged.
c. tertiary structure is the overall shape of a polypeptide, which may be stabilized by hydrophobic interactions, hydrogen bonds, ionic bonds, and covalent bonds
d. quaternary structure is only found in proteins that have four identical polypeptide subunits.
e. secondary structures, which include the alpha helix or beta pleated sheet, are held together by interactions between r groups.
Answers: 3
Biology, 22.06.2019 03:30
Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry
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Biology, 22.06.2019 03:50
2. how does the miller-urey experiment fall short of demonstrating that life can arise from inorganic molecules? explain. a. it doesn't show a leap between a collection of amino acids and a single-celled organism. b. it recreates the conditions that existed at the earth's beginning, but no molecules form as a result. c. it doesn't provide evidence of the formation of amino acids. d. it doesn't show how multicellular organisms developed from unicellular organisms
Answers: 2
Biology, 22.06.2019 06:00
In the practice of science, this type of reasoning is used to develop explanations.
Answers: 1
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