Biological molecules 1st year biology short question

Q :4 enlist bioelements that make 98% of living system.

These are the following elements that make 98% of our living system

Oxygen 65%

Carbon 18%

Hydrogen 10%

Nitrogen 3% 

Calcium 1.5% sulfur 0.25% 

Phosphorus 1%

Q 5: Why fats produce more energy than carbohydrates?

Because there are so many carbons in three fatty acids, and each 2-carbon unit can enter the citric acid cycle (Krebs cycle), one fatty acid molecule can generate much more ATP than one molecule of glucose

Q7: distinguish between saturated and unsaturated acyl glycerol

Unsaturated acyl glycerol (oils)

Unsaturated acyl glycerol are derived from plants

They are liquid at room temperature

They contain one or more double bonds between carbon carbon atoms in their chain

Saturated acyl glycerol

Saturated acyl glycerol are derived from animal source

They are solid at room temperature

They contain single bond between carbon atoms in their long chain