In the stomach, what is the expected protonation state of the side chain of amino acid D? a)Deprotonated b)Protonated c)Neither, amino acid D does not have an ionizable side-chain

Proteins are denatured by acid in the stomach. This denaturation makes them better substrates for proteolysis. Explain why this is the case.

What is the structure that secretes amylase to aid in the digestion of starches?? Any help, please

The isoelectric point of an amino acid is the point where; O a) the amino acid carries no net electrical charge b) the a-carboxylic acid is protonated and the a-amino group is unprotonated c) ) the pKa of the a-carboxylic acid is the same as the pK, of the a-amino group a d) the solubility of the amino acid is maximized e) the a-carboxylic acid and the a-amino group are both half protonated MacBo 80 000 esc F1 F2 F3 F4

Glycogen is the major animal storage polysaccharide, and is a polymer of glucose. a) List ALL the biochemical steps involved in storing GLUCOSE as glycogen b) Give NAME/S of the ENZYMES involved in EACH listed step c) What PULLS the reaction forward? d) Give the NAME of the tissue where these steps occur. (HINT: remember glycogen is branched chain).

Provide the correct answer for the multiple choice question and explain how the question relates to the paragraph on the pathways and transformation of energy and matter

How is potassium important to the sodium pump a) attracts sodium out of the protein pump surface. b) is not important to the sodium pump. c) binds with the protein so it can return to the active shape. d) catalyzes ATP to release energy. e) maintains water concentration

Which of the following words is missing in the following sentence: Histamine stimulates ___________________ cells that release _______________ a) parietal-; intrinsic factor b) parietal-; hydrochloric acid c) cup-; mukus d) parietal-; pepsinogen e) nack-; mukus

O-linked glycosylation occurs on ___ residues of proteins. a) Serine and Threonine b) Asparagine c) Methionine d) Acidic amino acid residues

Please answer letter “d)” ASAP please!