Question

8 1/1 point in dna and rna the bond between adjacent nucleotides is known as a phosphodiester bond. 9 0/1 point molecules like dna, rna, proteins and polysaccharides have directionality or polarity because: overall the molecules are polar so they are soluble in water; the molecules contain polar covalent bonds; each end of the molecule has a different functional group (with a red cross on one option) 10 1/1 point the primary structure of a proteins is a linear sequence of amino acids. one end of this linear sequence has carboxyl group, the other end has a(an) amino

Explanation:

Question 8

In DNA and RNA, the bond between adjacent nucleotides is a phosphodiester bond. This is a key concept in molecular biology (a subfield of Biology) where the 3' hydroxyl group of one nucleotide and the 5' phosphate group of another form this covalent bond, linking the sugar - phosphate backbone.

Molecules like DNA, RNA, proteins, and polysaccharides have directionality or polarity because each end of the molecule has a different functional group. For example, in DNA, one end has a 5' phosphate group and the other has a 3' hydroxyl group; in proteins, one end has an amino group and the other has a carboxyl group. The option "the molecules contain polar covalent bonds" is incorrect because having polar covalent bonds does not directly explain directionality, and "overall the molecules are polar so they are soluble in water" is also incorrect as solubility in water is not related to directionality.

The primary structure of a protein is a linear sequence of amino acids. One end of this linear sequence has a carboxyl group, and the other end has an amino group. This is a fundamental concept in protein structure (within the subfield of Biology, specifically Biochemistry).

Answer:

phosphodiester bond

Question 9