Lesson (2) Chemical structure of living organisms' bodies

(Proteins and nucleic acids)

(Give reasons for (Rationlize

1- Proteins play an important role in life.

2- The importance of DNA

3- The importance of RNA

4- The importance of the primary structure of proteins

5- The importance of the secondary structure of proteins

6- The importance of the tertiary structure of proteins

7- The importance of the quaternary structure of proteins

8- When albumin protein disassociate, it produces amino acids only.

9- There are millions of different proteins although they are formed from the
same 20 amino acids.

 Choose the correct answer 

- ....... are the basic components of lymph and blood in human body.
 

 Polymers of proteins are composed of monomers called .......
 

The acidic functional group forming an amino acid is called.......
 

 The basic functional group forming an amino acid is called.......
 

 Proteins are formed from groups of amino acids linked together by ....... Bond
 

............. is from simple proteins.
 

.......... is from phosphoproteins.
 

 Casein is a protein which contains ......... element
 

Hemoglobin protein contains ......... element
 

- Thyroid gland secretes thyroxin hormone, the proteins of thyroxin hormone
contain....... element
 

 .......... carries the hereditary traits of living organisms.
 

 ......... acid helps in protein synthesis process which cause the appearance of
hereditary traits
 

 Write the scientific term
1- Biological macromolecules whose monomers are called amino acids.

2- A bond between two molecules form when the carboxyl group of an amino
acid reacts with the amine group in another one, which releases water molecule
(H2O)

3- Two amino acids linked by peptide bond.

4- protein chain formed from many amino acids.

5- They are composed of structural units called nucleotides.

6- A kind of protein found in milk

7- Protein which consist of only amino acids.

8- Proteins which consist of amino acids associated to other elements.

9- Protein found in blood and consists of amino acids bound to iron element

10- The building units of nucleic acids

11- A kind of pentose which forms the nucleotides of RNA

12- A kind of pentose which forms the nucleotides of DNA

- The nucleic acid which is responsible for transferring hereditary traits
through generations.

14- The nucleic acid which takes part in making proteins which are responsible
for the hereditary traits and organization of biological processes . through generations.