- Isotopes that are unstable and decay when their nucleus breaks up into elements with lower atomic numbers, emitting significant amounts of energy in the process, are called:
- Why did President Hoover's "associational action" fail? People were so deeply self-interested as a result of 1920s culture that they would not voluntarily help others. Most Americans had lost respect for the president long before his calls for charitable and collective measures. The economic decline was deeper than had been seen before and beyond saving by the few with means. It depended on goodwill and as the depression worsened, groups of people blamed rather than helped each other.
- Alcohol consumption adversely affects the synthesis of molecules involved in protein degradation, which can eventually lead to liver damage. Given this information, which organelle in liver cells is most directly affected by alcohol consumption?
- Oxygen has an atomic mass of 16 and an atomic number of 8. How many neutrons are present?
- Atoms containing specific number of protons are called
- In the crystal matrix of ordinary salt, the sodium and chlorine are held together by:
- A scientists conducts a procedure that causes nitrogen atoms to gain neutrons. The resulting atoms will be
- Proteins are polymers formed of structural units called:
- Nitrogen has a higher electronegativity than hydrogen. As a result you would expect that ammonia (NH3) molecules can form ____ with each other.
- All atoms posses the ability to do work. The term that is defined as the ability to do work is
- The area around a nucleus where are electron is most likely to be found is the:
- The digestive enzyme pepsin works in the acidic environment of the stomach to hydrolyze peptide bonds. As a result, pepsin affects which macromolecule?
- A circular molecule of DNA devoid of any histone proteins describes the chromosome of a (an):
- Bicarbonate ions in the blood can absorb hydrogen ions, keeping pH balanced. Bicarbonate is acting as a ____ in blood.
- Oxygen-16 is abundant and has 8 protons and 8 neutrons. Oxygen-18 has two extra neutrons. these two forms are:
- Vitamin D can be synthesized by the body from a derivative of cholesterol. Given this information, predict vitamin D's solubility
- Dennis has a history of heart disease in his family and was reducing his intake of saturated fats. Saturated means each carbon atom is bonded to as many hydrogen atoms as it can accept. If a carbon were bonded to two carbons, how many hydrogen could it accept?
- Relatively small organic molecules with a central carbon atom which is bonded to a carboxyl group, an amino group, a carbon containing group, and a hydrogen atom are called:
- Life is thought to have evolved from complex molecules formed by the interaction of smaller molecules in oceans and the atmosphere. The substance which brought these molecules together to interact is
- The pH of your small intestines is around 7.5 and the pH of your large intestine can be 5.5. As substances travel from the small intestines to the large intestines, what would happen to the H+ ion concentration?