The making of protein from 20 amino acids was compared in the chapter to the use of the English alphabet (26 letters) to make words and speak the English language. Why was this such a fitting analogy?
The English alphabet has 26 letters from which an astonishing variety of words can be made. Some words are short, some are long. Some words contain just a few different letters, others contain many different letters. The same holds true for proteins made from the 20 amino acids found in the human body; some are short, some are long, and some contain a handful of different amino acids, whereas others may contain all 20 amino acids.
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Lecithin is a type of
A. sterol. B. phospholipid. C. triglyceride. D. fatty acid.
Since 1990, food labels have been required on all fresh meat and poultry
Indicate whether the statement is true or false
The amount of salivary amylase produced by individuals _____
a. is the same for everyone b. varies based on level of hunger c. varies based on genetic traits d. decreases with age e. increases with age
What is a benefit of physical activity in older adults?
a. decreased blood flow to the brain b. decreased risk of cataracts c. increased tolerance to smoking d. increased blood flow to the brain e. decreased muscle mass