NURSING EXAM QUESTIONS
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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size of a specific amino acid can vary within a protein
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chemical composition of a specific amino acid can vary
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sequence and number of amino acids can be different in each protein
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same amino acid can have many different properties
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Detailed explanation-1: -Because amino acids can be arranged in many different combinations, it’s possible for your body to make thousands of different kinds of proteins from just the same 21 amino acids.
Detailed explanation-2: -Your body needs 20 different kinds of amino acids to function correctly. These 20 amino acids combine in different ways to make proteins in your body. Your body makes hundreds of amino acids, but it can’t make nine of the amino acids you need. These are called essential amino acids.
Detailed explanation-3: -Six amino acids are non-essential (dispensable) in humans, meaning they can be synthesized in sufficient quantities in the body. These six are alanine, aspartic acid, asparagine, glutamic acid, serine, and selenocysteine (considered the 21st amino acid).
Detailed explanation-4: -How can a cell make many different kinds of proteins out of only 20 amino acids? Of the myriad possibilities, how does the cell “Know” which proteins to make? Proteins are made of 20 amino acids arranged in many different sequences into chains of many different lengths.