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Questions and Answers
What is the primary role of collagen in the body?
What is the primary role of collagen in the body?
- Transmitting nerve impulses
- Providing structural support (correct)
- Carrying oxygen in the blood
- Facilitating enzymatic reactions
Which type of protein is primarily responsible for muscle contraction?
Which type of protein is primarily responsible for muscle contraction?
- Contractile proteins (correct)
- Structural proteins
- Transport proteins
- Enzymatic proteins
Pepsin, trypsin, and ribonuclease are examples of which category of proteins?
Pepsin, trypsin, and ribonuclease are examples of which category of proteins?
- Structural proteins
- Contractile proteins
- Enzymatic proteins (correct)
- Transport proteins
Which of the following proteins is a key transport protein found in muscle tissue?
Which of the following proteins is a key transport protein found in muscle tissue?
Elastin contributes to which of the following tissue properties?
Elastin contributes to which of the following tissue properties?
What is the sequence of amino acids in the structure of Bradykinin?
What is the sequence of amino acids in the structure of Bradykinin?
Which of the following amino acids is present in the structure of the antibiotics gramicidin S and tyrocidin?
Which of the following amino acids is present in the structure of the antibiotics gramicidin S and tyrocidin?
How are proteins classified according to the content provided?
How are proteins classified according to the content provided?
How many amino acids make up the peptide tyrocidin based on the given structure?
How many amino acids make up the peptide tyrocidin based on the given structure?
Which characteristic is NOT mentioned as part of the classification systems for proteins?
Which characteristic is NOT mentioned as part of the classification systems for proteins?
What function do enzymes serve in the body?
What function do enzymes serve in the body?
What percent of total proteins in a cell are estimated to be enzymes?
What percent of total proteins in a cell are estimated to be enzymes?
What types of proteins are primarily involved in chemical reactions within the body?
What types of proteins are primarily involved in chemical reactions within the body?
Which of the following describes polypeptide hormones?
Which of the following describes polypeptide hormones?
Which of these functions do proteins NOT perform in the body?
Which of these functions do proteins NOT perform in the body?
Study Notes
Enzyme Proteins
- Nearly 90% of total proteins in the cell are enzymes
- Enzymes catalyze chemical reactions within the body
Structural Proteins
- Provide structural support and shape to cells and tissues
- Examples include collagen, elastin, and keratin
Contractile Proteins
- Involved in muscle contraction and movement
- Examples include myosin and actin
Transport Proteins
- Facilitate the movement of molecules within the body
- Examples include hemoglobin, hemocyanin, myoglobin, and serum proteins
Polypeptide Hormones
- Regulate metabolic pathways within the body
- Bradykinin is a polypeptide hormone with 9 amino acids (Arg-Pro-Pro-Gly-Phe-Ser-Pro-Phe-Arg)
Cyclic Peptides
- Gramicidin S and Tyrocidin are cyclic peptides that act as antibiotics
- They are made up of 10 amino acids and contain D-phenylalanine
- The structure of Gramicidin S is: Val-Orn-Leu-D-Phe-Pro, Pro-D-Phe-Leu-Orn-Val
- The structure of Tyrocidin is: Val-Orn-Leu-D-Phe-Pro, Tyr-Gln-Asn-D-Phe-Phe
Protein Classification
- Different systems classify proteins based on structure, solubility, function, chemical composition, or other properties.
- There is no universally satisfactory system for classifying proteins.
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Description
Explore the various types of proteins, including enzyme proteins, structural proteins, contractile proteins, and transport proteins. This quiz will test your understanding of their roles and examples within biological systems. Delve into the fascinating world of polypeptide hormones and cyclic peptides as well.
