Lesson (4) Chemical reactions inside organisms' bodies

Give reasons

1- Metabolism reactions are very important to living organisms.

2- Catabolism and Anabolism reactions are essential for living cells.

3- The biological importance of enzymes

4- Amylase is a simple enzyme, while Catalase is a complex one. Amylase is a simple enzyme .

5- Temperature affects enzyme activity

- When the temp. of an enzyme increases more than its optimum temperature, its activity decreases gradually until it stops..

7- pH of solutions affect enzyme activity.

 Choose the correct answer

1- A process by which simple molecules are used to build complex macromolecules through a group of chemical reactions which consume energy is called ………………

2- A process which breaks some molecules to release energy from them is called ………

3- The substance on which enzyme work is called …

4- Enzymes are made up of ……

5- …………. is from simple enzyme

6- ………. is from complex enzymes.

- ………….. is from monosaccharides

- …….. is a disaccharide whose polymer is composed of one glucose molecule and another fructose one

3- ……….. is from phosphoproteins.

(B) What happens if:-

1- Water didn't have high specific heat.

The temp. of an enzyme becomes zero

- Water didn't have high viscosity.

(C) Show the structures of the following

1- Amino acid

- Complex enzyme

Nucleotide.

Question

 (A) What's meant by:-

1- Carbohydrates.

2- Enzymes

3- Anabolism

(B) Correct the underlines words

 Animals store energy in the form of starch

 Amylase is form complex enzymes.

Amino acids form biological macromolecules called lipids

 Oils are lipids which form hormones inside human body.

(C) Give reasons for:-

The biological importance of enzymes.

 Water has low viscosity and high surface tension.

 Waxes cover the leaves of desert plants.

(A) Write the scientific term 

- Biological macromolecules whose general formula is (CH2O)n

- The cohesion of molecules of the surface of a fluid such as water

 Nucleic acids which take part in protein synthesis processes by copying genetic information.

- A process by which molecules are broken inside cells to release energy.

A complex sugar which forms the cell walls of plant cells.