Question 6 of 10
2 points
the primary structure of a protein refers to the sequence of amino acids that
are linked together in a long chain. which of the following common items
would best represent the primary structure of a protein?
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a. a burning wax candle placed in front of a small fan
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b. a dry kitchen sponge sitting beneath a mound of table salt
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c. beads of different colors joined together on a piece of string
d. two unsharpened pencils held together by a piece of tape

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: