Exam 2: Chemistry of Life

Both DNA and RNA contain uracil.

An atom's mass number is usually greater than its atomic number.

The magnesium atom has two electrons in its outer energy level and is willing to donate both of them.The sodium atom has seven electrons in its outer energy level and will accept one electron.The chemical formula for the compound formed by magnesium and sodium would be

A particular atom contains 28 protons,28 electrons,and 31 neutrons.What is its atomic mass? What is its atomic number?

The symbol for a sodium atom that has lost one electron would be Na.

Match the term with its definition or explanation. -This is an example of a functional protein.

Neutrons have no electrical charge.

Assume an atom of element X has two electrons in its outermost energy level.Two atoms of element Y each have seven electrons in their outermost energy level (eight is stable).Explain how an ionic bond would form among these three atoms and give the formula for the compound.

The proton of the atom is found in orbitals around the nucleus.

Explain the relationship between the number of H⁺ ions in solution and the pH value.

Which of the following is an example of a disaccharide?

Which of the following is an example of a polysaccharide?

The shape of proteins determines their role in body chemistry.

Which of the following is not true of triglycerides?

Which of the following is a nucleic acid with a double helix structure?

Water is the most abundant solute in the body.

Neutrons and electrons are found in the nucleus of the atom.