All but one of the following is a function of the low ph found in the stomach. select the description below that does not reflect a role of stomach acid.
a) the stomach's acid catabolically breaks down food stuffs in preparation for absorption. b) stomach acid denatures proteins making the poly peptide chain more accessible to pepsin digestive enzymes. c) many potentially harmful bacteria will be prevented entry to the small intestine by stomach acid. d) low ph converts pepsinogen to its active form of pepsin, preventing the protease enzyme from digesting the cells that produce it.

Option (A).

Explanation:

Stomach is an important organ involved in digestion that helps in the breakdown of biomolecules. Stomach contains the acidic environment that are necessary for the enzyme activation.

The stomach's acid is not involved in the catabolic breakdown of food stuff. The stomach's acid is also not involved in the food absorption. The acid is used for pepsin digestive enzymes.

Thus, the correct answer is option (A).

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.