Yes.
Prokaryote mostly contain a single large DNA molecule (circular chromosome) while eukaryotes contain multiple linear chromosomes. Most prokaryote are haploid that means they contain only one copy of each gene.
This molecule contain only one atom from each component.
Methane is one. Molecules that contain only carbon and hydrogen are called hydrocarbons.
No, it contains two: hydrogen and nitrogen, It does however contain four different atoms: one of nitrogen and three of hydrogen.
What is composed of only one type of molecule
If it is a pure substance, than only one! Now that pure substance may contain many different elements (as many elements can make up a single pure compound), but a pure substance means only one compound.
One molecule that does not contain phosphate is methane (CH4), which is a simple hydrocarbon consisting of one carbon atom bonded to four hydrogen atoms.
No. Molecules that contain only one element are considered elements. An example is the diatomic molecule of oxygen O2.
Carbon monoxide contain one atom of carbon and one atom of oxygen.
Yes, although prokaryotic cells have only one DNA molecule, or chromosome. Eukaryotes have more than one.
A molecule of RNA contains one strand of nucleotides.
Oxygen is an element in its own right, so it only contains one element: oxygen.