A. A. A stress test can be used to test for heart disease. Stress tests are tests performed by a doctor and/or trained technician to determine the amount of stress that your heart can manage before developing either an abnormal rhythm or evidence of ischemia (not enough blood flow to the heart muscle).
The four types of organic compounds are carbohydrates, lipids, proteins and nucleic acids. Organic molecules contain the elements carbon and hydrogen, and they are found and made in living things. Keep Learning.
Four important classes of organic moleculesâcarbohydrates, lipids, proteins, and nucleic acidsâare discussed in the following sections. Carbohydrates Carbohydrates are classified into three groups according to the number of sugar (or saccharide) molecules present: 1  A monosaccharide is the simplest kind of carbohydrate. It is a single sugar molecule, such as a fructose or glucose (Figure 1). 2  A disaccharide consists of two linked sugar molecules.