The following are correct about vitamin B12 EXCEPT
Select one:
a. it is also called cobalamin
b. it is important in the catabolism of
some branched chain amino acids
c. it is required in hydroxylation
reactions
d. its methyl derivative is required in the
synthesis of methionine
e. one of its structural components is a
corrin ring​

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.