5 Written questions
5 Matching questions
- Which elements are most common in the human body?
- How does the number of protons in a water molecule compare with the number of electrons?
- Explain the difference between saturated & unsaturated fats.
- What are the general difference between an organic molecule and an inorganic molecule?
- Distinguish between a molecule and a compound.
- a Carbon, hydrogen, oxygen, nitrogen, sulfur, phosphorus.
- b Molecule: two or more atoms may combine to form a distinctive type of particle.
Compound: substance composed of two or more chemically bonded elements.
- c Saturated: single carbon-carbon bond link all the carbon atoms; each carbon atom binds as many hydrogen atoms as possible & is thus saturated with hydrogen atoms.
Unsaturated: have one or more double bond between carbon atoms. Fatty acids with one double bond.
- d The number of protons equals the number of electrons.
- e Organic: compounds have carbon and hydrogen.
Inorganic: all other chemicals, chemicals that does not include both carbon and hydrogen atoms.
5 Multiple choice questions
- Because body functions result from cellular functions that in turn, result form chemical change
- Simple: sugars include monosaccharaides, disaccharides; straight chains or rings.
Complex: polysaccharides are built of simple carbohydrates made of many bonded glucose molecules chains of sugars, cant digest.
- Two atoms of hydrogen can combine with one atom of oxygen to produce a molecule of the compound water.
Atoms of the same element combine, they produce molecules of that element.
- DNA: molecules store the information for protein synthesis.
RNA: molecules use this information to construct specific protein molecules.
5 True/False questions
What is the relationship between matter and elements? → All matter is composed of fundamental substances.
Define electrolyte balance. → Energy or atomic fragments they emit.
Compare the characteristics of an acid, a base & a salt. → Acid: substance that releases hydrogen ion
Base: substance that release ions that can combine with hydrogen ions
Salt: substance formed by the reaction between and acid and a base.
List 3 main types of lipids found in cells. → fats, phospholipids, and steroids.
What is the difference between an electrolyte and a nonelectrolyte? → Electrolyte: substance that ionizes in a water solution
Nonelectrolyte: organic compounds that dissolve in water, usually do not release ions.