5. Una molécula de ADN contiene 300 pares de bases nitrogenadas. Si el 80% de las bases son de citosina (C), ¿cuántas guaninas habrá en esta molécula de ADN? 6. Siguiendo el ejemplo anterior, ¿cuántas adeninas tendrá la molécula de este ADN?

7. Las siguientes estructuras químicas son la base de la biosíntesis de las bases nitrogenadas del ADN.

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different

Identify the structures ! 20 points

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.