A student is reading about the chemical composition of a category of molecules. The molecules are found as repeating units of proteins. What type of molecule are the repeating units?
amino acids
fatty acids
monosaccharides
nucleotides

What is thought to have caused the mass extinction at the end of the cretaceous period?

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.

The nursing instructor has been observing nursing students initiate an iv infusion. which action(s), if made by the nursing student, indicates that further instruction is needed? (select all that apply.) the nursing student: