In the alpha helix the hydrogen bonds:

are roughly parallel to the axis of the helix. are roughly perpendicular to the axis of the helix.
occur mainly between electronegative
atoms of the R groups.
occur only between some of the amino acids of the helix.
occur only near the amino and carboxyl termini of the helix.

● are parallel to the axis of helix.

●occur only near the amino and catboxyl termini of the helix.

Explanation:

Alpha helix is a common protein secondary structure unit. It is a right handed coil of amino acid residue on a polypeptide chain.It is stabilized by the formation of hydrogen bonds parallel to the axis of helix,formed between the hydrogen of amino and oxygen of carbonyl group of every fourth peptide bonds.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl