13 Questions
What is the purpose of the dates and page numbers mentioned in the text?
To demonstrate the use of pagination in a document
Why are the same dates and page numbers repeated multiple times in the text?
To show pagination across multiple pages
What is the most likely reason for including 'Page X of Y' in the text?
To indicate the current page number and total number of pages
How many amino acids are found as constituents of mammalian proteins?
20
What distinguishes proline from other amino acids?
It contains an imino group (-NH) instead of an amino group (-NH2)
At what pH is the carboxyl group of amino acids dissociated?
Approximately pH 7.4
What is the configuration of all the amino acids found in proteins?
L-configuration
Where are D-amino acids found according to the text?
In antibiotic produced by microorganisms
Proline contains an imino group (-NH) instead of an amino group (-NH2)
True
Only 19 amino acids found in proteins have a carboxyl group (-COOH) and an amino group (-NH2) bound to the same carbon atom called the α-carbon
False
All the amino acids found in proteins are of the D-configuration (amino group on the left of α-carbon)
False
There are approximately 20 amino acids present in various animal, plant, and microbial systems
False
At physiologic pH (approximately pH 7.4), the carboxyl group is dissociated, forming the negatively charged carboxylate ion (– COO –), and the amino group is protonated(– NH 3+)
True
Test your ability to identify and match page numbers with corresponding dates. This quiz presents 12 pages, each labeled with a date, and challenges you to correctly pair the dates with their respective page numbers.
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