Protein quiz online

What is the number of free carboxyl groups in the polypeptide chain that is consisting of 4 amino acids

• 1

• 3

• 4

• 5

The polypeptide chain that consists of 8 amino acids needs------------peptide bonds

• 4

• 6

• 7

• 8

The following graph illustrates the percentage of some nutrient elements in different types of food, study it, then answer:

Which type of food contributes to increasing the efficiency of gas exchange in the blood

• 1

• 2

• 3

• 4

The following graph illustrates the percentage of some nutrient elements in different types of food, study it, then answer:

Which type of food contributes greatly in the formation of thyroxine hormone

• 1

• 2

• 3

• 4

Milk helps in building the body tissues, because it contains

• casein

• fats

• lactose

• minerals

A person has an accident, that led to the occurrence of a deep wound in his right arm. Which of the following food would their eating help in healing the wound rapidly?

• fresh vegetables and milk

• fresh fruits and eggs

• meats and eggs

• milk and rice

By using the symbols, glucose (G) and amino acids (AA) which of the following represents a part of the pepsin enzyme

• a

• b

• c

• d

Each of the hooves and horns consists of different proteins, due to the difference in the...............in their building units

• number of water molecules that are present

• alkyl group

• free carboxyl group

• free amino groups

In which of the following ,Buriet's indicator gives a positive result

• grape juice

• peanut powder

• wheat powder

• bean seeds powder

The following figure repesents two experiments that are carried in (X) and (Y) food by using Sudan-4 reagent and Buriet's reagent what are the two substances

• malt powder - olive oil

• malt powder - wheat powder

• wheat powder - egg albumin

• olive oil - egg albumin