What carbohydrates that are polymers?
Carbohydrates that are polymers include starch, cellulose and glycogen.
Simple carbohydrates (sugars) and complex carbohydrates (starches) are not commonly referred to as polymers, although the structures of each are somewhat similar. The term "Polymers" generally refers to either natural (i.e. polyisoprene) or synthetic (i.e. polyamide) compounds in which there is a repeating structural unit created by polymerization. Polymers are also called plastics or rubbers.
Identify and explain examples of monomers and polymers I'm carbohydrates proteins and nucleic acids?
It depends on the context. Colloquially, proteins and carbohydrates mean the polymers (polypeptides and polysaccharides) because there is no need to address the monomers - we eat the polymers. However, while studying Biochemistry, it is not sufficient to say just protein or carbohydrate. You would need to specify if your talking about a monomer or a polymer and what type.
Carbohydrates are a class of nutrients. All nutrients have monomers which are the organic building blocks of polymers. Under carbohydrates, there are the polymers, polysaccarides, and the monomers, monosaccharides. Monosaccharides are linked together through condensation (dehydration) reactions to form chains of disaccharides and polysaccarides.