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Proteins in Living Systems

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Questions and Answers

What is the common structural feature shared by all proteins?

Linear polymers of amino acids (correct)

Formation of immunoglobulins

Presence of collagen and calcium phosphate crystals

Presence of carboxyl and amino groups

Which class of molecules are essential for every life process?

Carbohydrates

Nucleic acids

Lipids

Proteins (correct)

What determines the role of an amino acid in a protein?

The presence of carboxyl groups

Its distinctive side chain (R group) (correct)

The number of hydrogen atoms it contains

Its location in the protein structure

How many standard amino acids are found in mammalian proteins?

20 Signup and view all the answers

Which group of proteins fight infectious agents in the body?

Immunoglobulins Signup and view all the answers

What type of organic molecules are amino acids?

Molecules possessing both carboxyl and amino groups Signup and view all the answers

What is the main function of contractile proteins?

Movement Signup and view all the answers

Which component of an amino acid determines its role in a protein?

Side chain R group Signup and view all the answers

What is the distinctive feature of the side chain in amino acids?

It is unique for each amino acid Signup and view all the answers

Which class of molecules are essential for directing and regulating metabolism?

Polypeptide hormones Signup and view all the answers

What type of proteins are responsible for fighting infectious agents in the body?

Immunoglobulins Signup and view all the answers

Which organic molecules possess both carboxyl and amino groups?

Amino acids Signup and view all the answers