Put these steps in the mechanism of chymotrypsin catalysis in order from first to last. note that your textbook may not break out each of these steps individually, but all steps should be ordered. (there will be eight steps.) a. his 57 catalyzes removal of h from ser 195 hydroxyl. b. his 57 donates h to n of sissile peptide bond, tetrahedral intermediate decomposes. c. the portion (n-terminal end) of the original substrate with the new carboxylate terminus diffuses away. d. water donates h to his 57. e. resulting oh attacks carbonyl of remaining substrate. f. his 57 donates h to ser 195 o, leading to collapse of thtrahedral intermediate. g. the portion (the c-terminal end) of original substrate with the new amino terminus diffuses away. h. ser 195's nucleophilic o attacks carbonyl c of substrate.

h let me think

- 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   the answer is c hope i'm right

you need to have a picture of the atom that way we can answer it