Across
- 2. Proteins form the structural parts of cells and tissues, such as keratin in hair and fingernail. Keratin makes up about 90 percent of your hair.
- 5. The _________________ is the product of the interaction between the side chains (R) of the amino acids composing the protein...Mutual attraction of adjacent peptide chains also results from the formation of numerous hydrogen bonds.
- 10. It serves as reserves of amino acids, which can be used later on to nourish the growth and development of organisms. These proteins are found in egg whites (albumin), seeds, and milk.
- 11. A peptide or ________ is a chain of amino acids linked by peptide bonds.
Down
- 1. The configuration, or conformation, of a protein is determined by mutual attraction or repulsion of polar or nonpolar groups in the side chains (R groups) of the amino acids.
- 2. The nitrogen and carbon atoms of a peptide chain cannot lie on a straight line, because of the magnitude of the bond angles between adjacent atoms of the chain; the bond angle is about 110°.
- 3. Hormones are signal proteins that regulate body functions. Growth factors are proteins that influence the growth and development of an organism. The hormone insulin regulates glucose concentration in the blood.
- 4. Another type of protein that plays an important role in the body's defense system against disease-causing foreign organisms and particles, like bacteria and viruses, is called antibody.
- 6. The presence of membrane proteins in the form of Channel and carrier proteins in the plasma membrane aid cells to be selective in moving substances into and out of the cell. Other transport proteins exist in the body, such as hemoglobin in red blood cells that help in oxygen transport.
- 7. All chemical processes in the body need a large amount of energy. Most of these processes require several hundred degrees centigrade. However, body temperature is only 37°C and any slight increase in temperature can be fatal.
- 8. Proteins it is in the form of actin and myosin are found in cells to allow movement and cause muscle contraction. Animals are capable of locomotory movement and substance movement inside the body due to the action of contractile proteins. In addition, these proteins also help regulate body temperature.
- 9. They are the most abundant organic compounds in living organisms, accounting for up to 15% of the body's dry weight.