1. Do Now: Explain what enzymes do

2. Agenda

3. Show Me A Card! Remember: Work Silently Don’t call out
Put up your card at the same time as others
Let’s get competitive!

10. 2. A green plant is kept in a brightly lighted area for 48 hours
2. A green plant is kept in a brightly lighted area for 48 hours. What will most likely occur if the light intensity is then reduced slightly during the next 48 hours?
1.Photosynthesis will stop completely.
2.The rate at which nitrogen is used by the plant will increase.
3.The rate at which oxygen is released from the plant will decrease.
4.Glucose production inside each plant cell will increase

11. An inorganic molecule required by green plants for the process of photosynthesis is
1.oxygen
2.starch
3.carbon dioxide
4.glucose

12. Enzymes
A protein that speeds up the rate of a chemical reaction

13. Functions of Enzymes
Digestion (Breaks down)
Synthesis
(to make)

14. Digestive Enzyme
The enzyme(X) attaches to the starch and breaks it up into glucose products

15. Synthesis Enzyme
Helps simple compounds combine to make complex compounds

16. Enzymes Substrate- the molecules that attaches to the enzyme
Active Site- the area on an enzyme where the substrate attaches

18. Optimum Temperature
The temperature that an enzyme works best

19. Temperature change Increase in temperature increases enzyme rate
Decrease in temperature decreases enzyme rate

20. Extreme temperature change
Inactivates the enzyme because it destroys its shape

21. Optimum pH
Most enzymes work the best at a certain pH

22. An enzyme and four different molecules are shown in the diagram below.
The enzyme would most likely affect reactions involving
molecule A, only
molecule C, only
molecules B and D
4.molecules A and C

23. Which characteristic allows enzymes to function in a specific way?
1.Enzymes are complex compounds composed of starch.
2.Each enzyme has a characteristic shape.
3.Enzymes are long, complex fats.
4.Each enzyme is made up of four subunits

24. Compound X increases the rate of the reaction below.
Compound X is most likely
an enzyme
a lipid molecule
an indicator
an ADP molecule

25. Substances X and Y are examples of which kind of molecule?
simple sugar
amino acid
fat
hormone

26. The diagram illustrates a biochemical process that occurs in organisms
The diagram illustrates a biochemical process that occurs in organisms.  The substance labeled “catalyst” is also known as
a hormone
an enzyme
an antibody
an inorganic compound

27. The graph shows the relative rates of action of four enzymes, A, B, C, and D. Which two enzymes would function in a region of the human body having a neutral pH?
enzymes A and B
enzymes B and C
enzymes C and D
enzymes B and D

28. Base your answer on the graph and on your knowledge of biology
Base your answer on the graph and on your knowledge of biology. Which is a true statement about the relationship between pH and enzyme action?
All enzymes work best at a neutral pH.
Adding more acid does not affect the rate of activity of an enzyme.
Enzymes function only in a pH range of 4.0 to 5.5.
The activity of an enzyme is affected by pH

29. Uni-cellular Organisms
Organelles carry out life functions in simple organism

30. Unicellular vs Multi-celluar
Organelles
Organ Systems
Digestive System
Circulatory System
Respiratory System
Excretory System
Vacuoles -Store and digest foods
Cytoplasm- Circulates materials around the
Cell membrane- lets oxygen into the cell
Cell membrane- lets waste out of the cell

31. Multi-cellular Organisms
These organisms are complex
Organ systems carry out life processes in these organisms

32. Digestive System
To break down food into smaller particles such as glucose
Glucose is small enough to enter the cell

33. Circulatory System Structures- includes the heart, vessels and blood
Function- is to transport or circulate substances to and from the cells

34. Respiratory System
Function- to bring about gas exchange of oxygen and carbon dioxide between blood, the air and cells

35. Excretory System
Function-To remove waste products from the body

36. Human Organ Systems
They all have the common goal of maintaining homeostasis

37. Homeostasis Maintaining balance
Read pages and write an essay explaining what homeostasis is. Explain how feedback loops are used in homeostasis.
Maintaining balance

38. The table below provides some information concerning organelles and organs.
Based on this information, which statement accurately compares organelles to organs?
Functions are carried out more efficiently by organs than by organelles.
Organs maintain homeostasis while organelles do not.
Organelles carry out functions similar to those of organs.
Organelles function in multi-cellular organisms while organs function in single-celled organisms

39. The life function of transport in an organism directly involves those activities used to
1.absorb and distribute materials
2.obtain and hydrolyze materials
3.release energy from food
4.produce cellular waste products

40. When most proteins, fats, and carbohydrates are digested completely, they are converted to end products that
1.are soluble and can easily pass through cell membranes
2.contain long chains of amino acids and fatty acids
3.contain atoms of carbon, hydrogen, oxygen and nitrogen
4.are a direct result of dehydration synthesis

41. Class Assignment Select one human organ system
Draw a diagram of this system on construction paper. Color each part.
Label all the parts
Write an essay explaining its function. Choose a second organ system that works together with this organ system in the human body. Explain how they work together in the body to maintain homeostasis

42. Human Organ Systems
Digestive
Respiratory
Circulatory
Excretory

43. Cells
The basic unit of life

44. Its all about the cells
Human organ systems interact in order to keep cells alive by maintaining internal balance

45. Interaction
Interaction is similar to working together as in teamwork

46. Team Work
Once the respiratory system takes in oxygen, what system takes the oxygen to the cells?
Circulatory system