Which of the following class of biomolecules is NOT considered as a true polymer?

Carbohydrates
Lipids
Proteins
Nucleic Acids

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

Describe the layers of the suns atmosphere?

Why has two different alleles for the same trait?