Proteins

What substance did Gerri Mulder discover in all living plants and animals?

• Carbohydrates

• Protein

• Fats

• Nitrogen

How are proteins made up structurally?

• Chains of amino acid units

• Chains of fatty acids

• Chains of glucose molecules

• Chains of nucleic acids

What health issues can arise due to a lack of vitamin B12, iron, and vitamin D, as mentioned in the text?

• Respiratory problems

• Digestive disorders

• Skin conditions

• Nervous system diseases, blood disorders (anaemia), and rickets

What is the primary function of proteins in the body, as mentioned in the text?

• Providing energy

• Enhancing brain function

• Facilitating digestion

• Regulating the process of living

Why do mixtures of certain vegetable foods complement each other?

• Because they are harder to cook

• Because they supply all the essential amino acids in necessary amounts

• Because they taste better separately

• Because they are more expensive

Proteins consist of chains of amino acid units, and the sequence of these units is specific, giving each protein its unique properties.

• True
• False

Unlike carbohydrates and fats, proteins do not contain nitrogen.

• True
• False

Animal proteins generally have a low biological value for humans because they are difficult to digest.

• True
• False

Some proteins can dissolve in water, but none of them can dissolve in salt water.

• False
• True

Only about 20 amino acids are used, but the number of ways in which they can be arranged is almost endless.

• true

• false