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Protein Structures Quiz

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Questions and Answers

What is the tertiary structure of a protein?

The initial sequence of amino acids

The shape that the chain of amino acids makes

The 3D shape of the protein formed from twisting and folding (correct)

The alpha helix or beta pleated sheet shape

Which bond is NOT involved in forming the tertiary structure of proteins?

Disulfide bridges

Hydrogen bonds

Ionic bonds

Peptide bonds (correct)

What type of proteins are enzymes typically classified as?

Proteins that form fibres

Contain beta pleated sheets

Globular proteins (correct)

Long fibrous proteins

What test can be used to detect the presence of peptide bonds in a protein?

Biuret Test Signup and view all the answers

What determines the function of a protein in the end?

Primary structure Signup and view all the answers

What type of bonds form between the carboxyl and amino groups in proteins?

Ionic bonds Signup and view all the answers

What type of bonds are formed between amino acids in proteins?

Covalent bonds Signup and view all the answers

Which part of an amino acid is involved in forming peptide bonds?

All of the above Signup and view all the answers

What determines the primary structure of a protein?

Order and number of amino acids Signup and view all the answers

Which molecule is the monomer for protein synthesis?

Amino acid Signup and view all the answers

What is the function of glycolipids with carbohydrates on the cell surface membrane?

Enhance cell recognition Signup and view all the answers

What color change indicates the presence of lipids in an emulsion test?

Cloudy-white color Signup and view all the answers

How can you determine the presence of a peptide bond and protein in a solution?

Look for a purple colouration after adding very dilute copper (II) sulfate solution. Signup and view all the answers

What is the function of enzymes in a reaction?

Increase the rate of reaction by lowering activation energy Signup and view all the answers

What is the primary factor that affects the rate of enzyme-controlled reactions with regards to temperature?

The temperature, up to an optimum point, then it decreases Signup and view all the answers

What is the role of the active site in an enzyme?

It is an area formed by only a few amino acids and fits around the substrate Signup and view all the answers

What does the induced fit model describe in enzyme-substrate interactions?

The enzyme changes shape to better fit around the substrate Signup and view all the answers

What happens to enzyme activity at temperatures above the optimum?

Activity decreases due to increased kinetic energy Signup and view all the answers