Which best describes the structure ofa nucleotide? O A. Cytosine and guanine
OB. Thymine and adenine
O C. A base and a protein
OD. Base, sugar ring, and phosphate

Which of the following statements is true of enzymes? a)they dont provide an active site for substrates to bind in a reaction b)they act on a specific type of substrate in a reaction c)they unusable after a reaction d)they change shape after a reaction

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

Si el equipo no fuera bueno no con el entrenador.