NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What are the main atoms of a protein molecule?
A
Carbon, hydrogen, nitrogen, and oxygen
B
Nitrogen, oxygen, and phosphorous
C
Oxygen, sulfur, and nitrogen
D
Carbon, phosphorous, and hydrogen
Explanation: 

Detailed explanation-1: -Protein is mainly formed by carbon, hydrogen, nitrogen and oxygen. Amino acids join to form proteins. Each amino acid is formed with one basic group NH2 and one acidic group(COOH).

Detailed explanation-2: -The building blocks of proteins are amino acids, which are small organic molecules that consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom, and a variable component called a side chain (see below).

Detailed explanation-3: -All proteins contain four elements, carbon, hydrogen, oxygen and nitrogen, with most proteins also containing sulfur.

Detailed explanation-4: -In addition to carbon, hydrogen, and oxygen atoms, all proteins contain nitrogen and sulfur atoms, and many also contain phosphorus atoms and traces of other elements. Proteins serve a variety of roles in living organisms and are often classified by these biological roles.

Detailed explanation-5: -Proteins contain carbon, hydrogen, oxygen, nitrogen, and sulfur. A protein molecule is made from one or more long chains of amino acids, each linked to its neighbors by covalent bonds. Multiple chains of a protein are held together by weaker bonds. Proteins are the most numerous and diverse biochemical compounds.

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