6ch3

4. threadlike structures
6. smaller subunits of DNA
8. is a reaction by the body to substances such as dust, pollen, food products, or bee stings.
13. is the process by which DNA is copied
14. It helps red blood cells carry oxygen.
16. are characteristics, such as height and hair color passed from parents to offspring.
17. are chemical messengers
18. The set of events through which a cell moves from one cell division to the next in the life of a cell
20. it means plan
21. The protection by which cells “remember” foreign substances so they can respond faster if exposed to them again is called

1. buildinng blocks of protein
2. The process of building the proteins is called
3. are large molecules that are the building blocks for cells.
5. A cell goes through a series of steps to move proteins out of the cell during a process called
7. basic unit of heredity
9. cells that respond to hormones
10. a process when the genetic code on the RNA is read and proteins are built
11. the three bases in RNA
12. It is made of two strands of DNA twisted around each other.
15. They are abnormal cells that grow and divide, crowding the neighboring, healthy cells.
19. also called white blood cells