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Choose the correct answer

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  1. A new study looks at the relationship between media use and mental health, but does not answer a big question.
  2. A Read the text again and choose the correct ending to each sentence.
  3. A Write the questions for the answers below.
  4. A) Answer the following questions about yourself.
  5. A) Answer the questions and then compare your answers with the information given below.
  6. A- Correct the underlined words
  7. A. Answer the questions.

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

A- Proteins B- Carbohydrates C- Lipids D- Nucleic acids

2- Polymers of proteins are composed of monomers called …….

A- Nucleic acids B- Amino acids C- Citric acids D- Uric acid

3- The acidic functional group forming an amino acid is called…….

A- Amine B- Carboxyl C- Hydroxyl D- Phosphate

4- The basic functional group forming an amino acid is called…….

A- Amine B- Carboxyl C- Hydroxyl D- Phosphate

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

A- Ionic B- Hydrogen C- Hydrophobic D- Peptide

6- …………. is from simple proteins.

A- Albumin B- Casein C- Thyroxin D- Hemoglobin

7- ……….. is from phosphoproteins.

A- Casein B- Hemoglobin C- Albumin D- Insulin

8- Casein is a protein which contains ……… element

A- Iron B- Iodine C- Phosphorus D- Sulphur

9- Hemoglobin protein contains ……… element

A- Iodine B- Phosphorus C- Sodium D- Iron

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

A- Iodine B- Phosphorus C- Calcium D- Potassium

11- ………. carries the hereditary traits of living organisms.

A- DNA B- RNA C- Amino acid D- Phosphoric acid

12- ……… acid helps in protein synthesis process which cause the appearance of hereditary traits

A- Ribonucleic B- Deoxyribonucleic C- amino D- Sulphuric

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

13- 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.

Write short notes about

1- Importance of proteins

2- Importance of DNA

3- Importance of RNA

 

Choose the correct answer

1- Proteins

2- Amino acids

3- Carboxyl

4- Amine

5- Peptide

6- Albumin

7- Casein

8- Phosphorus

9- Iron

10- Iodine

11- DNA

12- Ribonucleic


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