Chemistry & Cells – Review Unit 2

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Presentation transcript:

Chemistry & Cells – Review Unit 2

Chemistry - Review List the 4 organic compounds responsible for building all living organisms. ____________________

Chemistry - Review Fill in the table below: COMPOUND ROLE/FUNCTION Transport, immune system, catalysts CARBOHYDRATE Store / transmit genetic information LIPID

Chemistry - Review Compare the terms listed below: Reactant – product Protein – enzyme – catalyst Substrate – active site Chemical reaction – activation energy Homeostasis – metabolism

Chemistry 1. During strenuous exercise, the body temp increases. The body responds to the increase in temp by sweating, which helps to reduce the body temp. Which is demonstrated in this situation? Excretion Metabolism Homeostasis Synthesis

Chemistry 2. Which describes the relationship in the shape between an enzyme and a substance? Competitive Regenerative Symmetrical Complementary

Chemistry 3. What name is given to the condition of stability enabled by a set of processes such as those involved in the maintenance of internal body temperature? Respiration Metabolism Homeostasis Metamorphosis

Chemistry 4. What type of organic molecules are enzymes? Carbohydrates Lipids Nucleic Acids Proteins

Chemistry 5. Which enzyme would you expect to find in a bacterium growing in a hot spring?

Chemistry 6. What type of molecule do whales use for energy storage and insulation? DNA Glucose Fat Starch

Chemistry 7. Which is a property of water? The water molecule is non polar. Solid water is denser than liquid water. Water molecules repel other water molecules. Water has the ability to dissolve many different substances.

Cells & Cell Transport - Review There are two types of eukaryotic cells, they are _________ and _________. All living organisms are composed of _________. 3. Using a “T chart” show the differences and similarities between a plant and animal cell.

Cells & Cell Transport - Review Label each cell as Eukaryotic or Prokaryotic Label each cell as Bacteria, Animal or Plant Label the distinguishing features of the cell that helped you identify its cell type.

Cells & Cell Transport - Review In this figure the selectively permeable membrane only allows Molecule D to move across the membrane. Predict which direction molecules will move and how many molecules will move across the selectively permeable membrane to maintain homeostasis. Direction molecules D will move? ___________________________ How many molecules will move? __________________________ Number of molecule D on each side? _________________________

Cells & Cell Transport - Review A cell has a 68% salt concentration. It is put into a solution with a 32% salt concentration. What type of solution is this? (Hypotonic, Hypertonic, Isotonic)   A cell has a 43% salt concentration. It is put into a solution with a 57% salt concentration Will water move into the cell, move out of the cell or have no net movement? A cell is placed into a solution. After one hour, the cell has not expanded or shrank. What type of solution was the cell put in? Hypotonic, Hypertonic or Isotonic

Cells & Cell Transport - Review Cell Membrane: Using the diagram complete the chart about the processes of Passive and Active Transport. Uses Energy? Direction Molecules Move? Passive Transport Active Transport

Cells & Cell Transport 8. A freshwater plant is placed in a container of saltwater. What is most likely happen to the cells of the plant? They will swell because water will move into them. They will swell because salt will move into them They will shrink because water will move out of them. They will shrink because salt will move out of them.

Cells & Cell Transport 9. What is the main function of a selectively permeable cell membrane? Storage of water Storage of chemicals Breaks down molecules within the cell Regulates what enters and leaves the cell

Cells & Cell Transport 10. Which structure is primarily responsible for directing all processes of a plant cell? Chloroplast Lysosome Mitochondria Nucleus

Cells & Cell Transport 11. Which of these would most be least likely to diffuse across the phospholipid bilayer of a cell membrane? Water Oxygen Sodium Ions Carbon Dioxide

Cells & Cell Transport 12. A molecule can easily pass through the selectively permeable membrane of an animal cell. Which of these most likely describes the molecule? The molecule is very small and charged The molecule is very large and charged The molecule is very small and not charged The molecule is very large and not charged

Cells & Cell Transport 13. What will happen if an animal cell that has a solute concentration of 1% is placed in a 5% saltwater solution? It will shrink because there is more water moving out of the cell. It will burst because there is more water moving into the cell It will burst because there is more salt moving into the cell It will remain the same size because there is an equal amount of water moving into and out of the cell

Cells & Cell Transport 14. Which is present only in plant cells? Nucleus Large Vacuole Mitochondria Cell Membrane

Cells & Cell Transport 15. What is the function of mitochondria? To make new DNA through DNA replication To make protein through the process of translation To convert sunlight into glucose through photosynthesis To convert pyruvate into ATP through cellular respiration

Cells & Cell Transport 16. Which serves as the outer boundary of a cell? Golgi apparatus Plasma Membrane Nuclear Membrane Endoplasmic reticulum

Cells & Cell Transport 17. If energy is needed to move materials into or out of a cell, what is most likely occurring? Active transport Passive transport Osmosis Diffusion

Cells & Cell Transport 18. Which cellular structure produces proteins using coded instructions from DNA? Ribosome Lysosome Golgi Apparatus Endoplasmic reticulum

Cells & Cell Transport 19. How are prokaryotic and eukaryotic cells similar? Both contain a nucleus Both contain ribosomes Both contain membrane-bound organelles Both contain cell walls

Cells & Cell Transport 20. Which would be the best evidence that a cell is using active transport to move a substance across its cell membrane? Substances are moving rapidly across the cell membrane ATP is being rapidly consumed near the cellular membrane Substances are moving from high to low concentrations Substances are moving through channels in the cell membrane

Cells & Cell Transport 21. Which function do structures X and Y have in common? Digestion Gathering Food Movement Reproduction

Cells & Cell Transport

Cells & Cell transport 22. This diagram shows a plant cell. Which structure is found in a plant cell but is absent in an animal cell? 1 2 3 4

Cells & Cell transport