Protein Tertiary Structure and Secondary Structures Quiz

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What makes the hydrogen-bonded sequences in β-pleated sheets stronger when they run antiparallel to adjacent elements?

N-H and C=O groups can line up as closely, strengthening the H-bonds.

The structure becomes more unstable, leading to stronger interactions.

Ionic bonds are formed between adjacent elements, increasing the hydrogen bond strength.

The geometry is such that N-H and C=O groups can't line up closely, weakening the H-bonds. (correct)

Which type of bonds stabilize the tertiary structure of proteins?

Hydrophobic bonds between R-groups (correct)

Covalent bonds between N-H and C=O groups

Van der Waals forces between R-groups

Ionic bonds between N-H and C=O groups

What is the result of disrupting the four interactions that stabilize a protein's tertiary structure?

Increased activity of the protein

Enhanced stability of the protein structure

Formation of stronger hydrogen bonds

Denaturation or unfolding of the protein (correct)

What type of interactions play a key role in creating the tertiary structure of proteins?

Hydrogen bonds Signup and view all the answers

In the example of hemoglobin provided in the text, how many polypeptide subunits come together to form a complete, functional hemoglobin molecule?

Four Signup and view all the answers

Where is the information to build the polypeptide subunits of hemoglobin found?

In two different genes Signup and view all the answers

What defines a protein's primary structure?

The sequence of amino acids joined by peptide bonds Signup and view all the answers

Which type of bond in a protein's structure exhibits characteristics of a double bond?

Peptide bond Signup and view all the answers

What do the polypeptide chains in a protein's structure lack flexibility due to?

The rigidity of the single bonds on either side of the peptide bond Signup and view all the answers

Which structural elements in proteins are formed without involving the R-groups?

Primary structure Signup and view all the answers

Protein Tertiary Structure and Secondary Structures Quiz

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Questions and Answers

What makes the hydrogen-bonded sequences in β-pleated sheets stronger when they run antiparallel to adjacent elements?

Which type of bonds stabilize the tertiary structure of proteins?

What is the result of disrupting the four interactions that stabilize a protein's tertiary structure?

What type of interactions play a key role in creating the tertiary structure of proteins?

In the example of hemoglobin provided in the text, how many polypeptide subunits come together to form a complete, functional hemoglobin molecule?

Where is the information to build the polypeptide subunits of hemoglobin found?

What defines a protein's primary structure?

Which type of bond in a protein's structure exhibits characteristics of a double bond?

What do the polypeptide chains in a protein's structure lack flexibility due to?

Which structural elements in proteins are formed without involving the R-groups?

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