Peptide bonds cannot rotate. This is because: a) the amino acid side chains are too bulky to allow this. B) Internal hydrogen bonding hinders rotation. C) interaction with water molecules hinders rotation D) the peptide bond has considerable double bond character
Proteins
We generally tend to think of proteins only from a dietary lens, as a component of what we eat. However, they are among the most important and abundant organic macromolecules in the human body, with diverse structures and functions. Every cell contains thousands and thousands of proteins, each with specific functions. Some help in the formation of cellular membrane or walls, some help the cell to move, others act as messages or signals and flow seamlessly from one cell to another, carrying information.
Protein Expression
The method by which living organisms synthesize proteins and further modify and regulate them is called protein expression. Protein expression plays a significant role in several types of research and is highly utilized in molecular biology, biochemistry, and protein research laboratories.
- Peptide bonds cannot rotate. This is because: a) the amino acid side chains are too bulky to allow this. B) Internal hydrogen bonding hinders rotation. C) interaction with water molecules hinders rotation D) the peptide bond has considerable double bond character
- Polypeptide chains prefer the trans conformation. This is because: a) This distances hydrophilic groups from hydrophobic groups b) this minimizes crowding of side chains c) This brings hydrophilic groups in contact with water molecules d) This allows proteins to fold more easily
- Ramachandran plots indicate that protein conformation is largely a function of: a) hydrophobicity b) number of amino acids c) torsion angles d) arrangement of prosthetic groups
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