How does the simple primary and secondary structure of dna hold the information needed to code for the many features of multicellular organisms?
the base sequence of dna carries all the information needed to code for proteins.
the hydrogen bonding among backbone constituents carries coded information.
the amino acids that make up the dna molecule contain the information needed to make cellular proteins.
the width of the double helix changes at each gene due to differences in hydrogen bonds.

The amino acids that make up the DNA molecule contain the information needed to make cellular proteins.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

i think its 100.

hope this !