Biological molecules (Topic 4)

All biological molecules contain the following elements.

• nitrogen, carbon, oxygen

• helium, oxygen, carbon

• hydrogen, nitrogen, sulphur

• carbon, hydrogen, oxygen

Which of the following elements may be present in proteins but won't be present in carbohydrates or lipids?

• Hydrogen

• Carbon

• Oxygen

• Nitrogen

• Sulphur

Match the following classes of biological molecules.

• nucleic acids

• 
• carbohydrates

• 
• lipids

• 
• proteins

• 

Unscramble the answer.

Carbohydrates, lipids and proteins are made of long chains of...

• rs

• y

• po

• me

• l

The sub-units or building blocks for biological molecules are called...

Starch, glycogen and cellulose are examples of...

• nucleic acids

• proteins

• carbohydrates

• lipids

Triglycerides are examples of...

• nucleic acids

• proteins

• carbohydrates

• lipids

Hormones and enzymes are examples of...

• nucleic acids

• proteins

• carbohydrates

• lipids

DNA and RNA are examples of...

• nucleic acids

• proteins

• carbohydrates

• lipids

Antibodies and hemoglobin are examples of...

• nucleic acids

• proteins

• carbohydrates

• lipids