Which of the following is a component of a nucleotide?

Covalent bonds form when

Which of the following is a synthesis reaction?

Hydrogen bonds form between molecules containing ________ bonds; the hydrogen bond is between a hydrogen atom of one molecule and a partially ________ charged atom of another.

Which of the following statements best describes RNA?

The cavity of the body immediately inferior to the diaphragm is the ________ cavity.

When a sperm cell comes into contact with an egg cell, there is a change in the electrical charge across the plasma membrane and various channel proteins close. These channels would be called

In an x-ray film of the skeletal system, the dense tissue areas appear ________ because they ________ the x-rays; and the less dense tissues appear ________ because they ________ the x-rays.

Which of the following chemical reactions best represents the decomposition of ATP?

What type of attachment proteins attach cells to extracellular molecules?