Answer: Here are the completed options
fuels
components of DNA and RNA
signalling
forming barriers between organelles
digesting enzymes
breaking up lipids for digestion
providing structure
The correct options are
most of the organic matter on our planet (cellulose, chitin, etc.)
Carbohydrates act as Body fuels
providing structure
Step-by-step explanation:
Carbohydrates are biological molecules and are constituents of starches, sugars, glucose e.t.c and are made up of carbon, hydrogen and oxygen which are the major constituents elements of the most organic matter on the planet.
Carbohydrates is a body fuel that act as the major energy source in the body. It gives and provide energy in the body needed for biological activities.
In plants, carbohydrates make up part of the cellulose, giving plants strength and structure. carbohydrates is to form a structure called the glycocalyx.