7. List and discuss four levels of a protein\'s structure. 8. What does (denatur

Question

7. List and discuss four levels of a protein's structure. 8. What does (denaturation of protein) mean? And what are the main types of a prcKinthcd results nthe loss dits brological propertes; usually ( urs by breaking t bond thod condr on ct prolen:a structural change o a protem's lerfiory strucbre 9. Compare the structure and function of DNA and RNA in cells. 10.Relate the structure of ATP to its function in cells. 11. Tell three main functions for carbohydrates. 12.Compare the structures of starch, glycogen, and cellulose and give one source for each sugar. 13. Compare the structures of phospholipids and triglycerides.

Explanation / Answer

7.

Primary structure: Amino acid sequence

Secondary structure: Local, regular arrangement of amino acids (ex: Alpha helix, Beta sheets etc)

Tertiary structure: Overall organization of polypeptide in 3-D

Quaternary structure: Interactions among individual monomers in an oligomeric protein.

8.

Denaturation of a protein refers to the destruction of the native structure of a protein.

Even though it does not involve breaking of peptide bonds, other bonds such as electrostatic interactions, H-bonds, and Vander wall interactions which stabilize the higher order protein structures (other than primary structure) are disrupted.

9.

DNA: Double-stranded, Deoxyribose sugar, and ATGC bases

Function: Serves as genetic material

RNA: Single-stranded, ribose sugar, and AUGC bases.

Function: Protein production.

10.

ATP = Adenosine triphosphate

It is considered as cellular energy currency. It contains three high energy phosphodiester bonds whose hydrolysis can be coupled to drive endergonic metabolic reactions in the cell.

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