5 Written questions
5 Matching questions
- Describe a disulfide bond?
- What is hypertonic?
- What is facilitated diffusion and how does it work?
- Where is genetic coding found?
- Identify the layers of epithelium
- a A solution with a higher salt concentration than in the cells
(cells shrink) LESS WATER THAN IN CELL
- b molecules move through a membrane from an area of greater concentration to an area of lesser concentration with the help of a carrier enzyme
(Example: intake of glucose by most cells)
- c In the DNA of our chromosomes or our genome. It is found in the cell nucleus.
- e covalent bond formed between two atoms of sulfur
(ex: strand of hair maintains its shape)
5 Multiple choice questions
- synthesis reactions: bonds are formed to join two or more atoms to make a new compound
(ex: proteins are sythesized by the bonding of many amino acids)
decomposition reactions: bonds are broken and a large molecule is changed to two or more smaller ones
(ex: digestion of starch into many smaller glucose molecules)
- A buffer system is a chemical or pair of chemicals that minimizes changes in pH by reacting with strong acids or strong bases
(ex: buffer bonds to H+ ions when body fluid is becoming too acidic or release H+ ions when fluid becomes too alkaline)
- movement of molecules from an area of greater concentration to an area of lesser concentration along the concentration gradient. Very slow process. FOR MOLECULES
(Example: exchange of gases in lungs or body tissues)
- Force or attraction between positive and negative charges that keeps atoms closely together
5 True/False questions
What is the cell nucleus and what is its function? → outer boundary of a cell made up of phospholipids, cholesterol and proteins.
its main job is to protect the cell and acts as a barrier for communication and assists in transport
What are the different kinds of bonding atoms? → 1. Chemical bonds
2. Ionic bonds
3. Covalent bonds
4. Disulfide and Hydrogen bonds
What is a gene? → A genetic code for protein
What is hypotonic? → A solution with lower salt concentration than in the cells
(cells burst) MORE WATER THAN IN CELL
What is a positive feedback mechanism? → the response to stimuli does not stop but rather keeps the sequence of events going. (requires an external brake)
EX: cervical stretching during childbirth