The most important difference is the order in which the elements are connected together, the functional groups as we say in chemistry. C,H and O can be arranged (in differing numbers) to make alcohols, aldehydes, ketones, acids and esters, to name just the obvious ones. When it comes to macromolecules you can get carbohydrates and fats for instance. The number of atoms also matters, so you can get many different examples within each class.
They have different ratios.
This gives each compound different properties.
They can be different due to the number of CHO contained in the molecule, the orientation (shape/ how the molecule is bending) of the CHO in the molecule, or a combination of both factors.
Different ratios
Macromolecules made of amino acids are called proteins.
Grains consist of carbohydrates mainly. There can be others too
Mainly enzymes are involved. They are made up of proteins
No, but most macromolecules are organic molecules (with a backbone made of carbon atoms). But it is possible to synthetically create macromolecules with a backbone made of silicon atoms (i.e. the silicones), boron atoms (i.e. the boranes), and a few others. The atoms attached to the backbone or forming side branches extending away from the backbone can be any element on the periodic table.
Mainly hydrogen and helium. The reason for this is simply that these are the most common elements in the Universe.
Stars are made from a lot of different elements, but when they are done they are mainly hydrogen and helium.
Stars are made from a lot of different elements, but when they are done they are mainly hydrogen and helium.
Molecules of carbons are known as orgains. Since carbon is the main atom of carbohydrates, proteins and other macromolecules they are said to be organic. There is no in organic macromolecules exist in our cell.
They are all formed from the same elements.
Because of gravity, the Earth's inner layers consist of the heavy elements, mainly metals. The heavy and radioactive ones are the origin of most of the heat.
Macromolecules made of amino acids are called proteins.
All elements are made of atoms.
Grains consist of carbohydrates mainly. There can be others too
Fats are made of the same elements as carbohydrates, but in different proportions.
which macromolecules are polymers made of nucleotides
Mainly hydrogen and helium with other trace elements.
Mainly enzymes are involved. They are made up of proteins