Amino Acids and Protein Functions

The video tutorial introduces amino acids, explaining their structure, properties, and importance. It differentiates between essential and non-essential amino acids, listing examples of each. The tutorial also covers protein formation through peptide bonds and highlights the functions of proteins in the body, such as building cells, repairing tissue, and maintaining weight control.

What is the general formula of an amino acid?

• R-COOH-NH2

• R-CH-NH2-COOH

• R-CH2-COOH

• R-CH2-NH2

Which property is NOT associated with amino acids?

• Crystalline nature

• Metallic luster

• High melting points

• Water solubility

What is a zwitterion?

• A molecule with only positive charges

• A molecule with only negative charges

• A molecule with both positive and negative charges but a net charge of zero

• A molecule with no charge

How many amino acids are considered essential?

• 21

• 12

• 15

• 9

Which of the following is an essential amino acid?

• Glycine

• Glutamic acid

• Histidine

• Alanine

Which amino acid is NOT essential?

• Tryptophan

• Proline

• Methionine

• Lysine

What type of bond joins amino acids together in proteins?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Peptide bond

What is the primary function of proteins in the body?

• To build and repair tissues

• To act as a catalyst in chemical reactions

• To provide energy

• To store genetic information

Which of the following is NOT a function of amino acids?

• Storing energy

• Maintaining weight control

• Building muscle

• Carrying oxygen

How do proteins differ from one another?

• By the number and sequence of amino acids

• By the type of peptide bonds

• By their color

• By the amount of water they contain