Acidic

The individual properties of amino acids are determined by their side groups. Some amino acids are acidic, meaning that their side groups release a hydrogen ion and become negatively charged when in the environment of a living cell. One acidic amino acid is called aspartate and has a negatively charged carboxyl group as part of its side group. The other acidic amino acid is known as glutamate, and is also characterized by a carboxyl group with a negative charge. Of the twenty amino acids, only these two are acidic.

Question 1: What is the designation used for amino acid side groups?
  1. AA
  2. SA
  3. SG
  4. R


Answer 1 Answer - (d) R

Question 2: What makes some amino acids acidic?
  1. Losing a hydrogen ion from their side groups.
  2. Gaining a hydrogen ion from their side groups.
  3. Losing an electron from their side groups.
  4. Gaining an electron from their side groups.


Answer 2 Answer - (a) Losing a hydrogen ion from their side groups

Question 3: How many amino acids are there?
  1. 20
  2. 22
  3. 4
  4. 7


Answer 3 Answer - (a) 20

Question 4: What are the names of the two amino acids that have negatively charged side groups?
  1. Asparagine and glutamine.
  2. Aspartic acid and glutamic acid
  3. Aspartate and glutamate.
  4. Adenine and guanine.


Answer 4 Answer - (c) Aspartate and glutamate