Apolypeptide has an amino acid sequence of: alanine-leucine-tryptophan-glycine- valine-alanine. this chain of amino acids is further organized into a helix that in-turn, folds in and around itself to form a globular structure. the primary structure of this polypeptide is

The primary structure is: alanine-leucine-tryptophane-glycien-valine-alanine.

Explanation:

The primary structure of a polypeptide corresponds to the linear sequence of amino acids joined by peptide bonds. In this case, if a polypeptide is formed by alanine-leucine-tryptophan-glycine-valine-alanine, this sequence represents its primary structure. In some proteins, replacing one amino acid with another within its primary structure can cause disease and even lead to death.

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.