Do Now: Explain what enzymes do

Agenda

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!

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

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

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

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

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

Synthesis Enzyme Helps simple compounds combine to make complex compounds

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

Optimum Temperature The temperature that an enzyme works best

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

Extreme temperature change Inactivates the enzyme because it destroys its shape

Optimum pH Most enzymes work the best at a certain pH

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

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

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

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

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

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

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

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

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

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

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

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

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

Excretory System Function-To remove waste products from the body

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

Homeostasis Maintaining balance Read pages 895- 896 and write an essay explaining what homeostasis is. Explain how feedback loops are used in homeostasis. Maintaining balance

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

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

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

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

Human Organ Systems Digestive Respiratory Circulatory Excretory

Cells The basic unit of life

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

Interaction Interaction is similar to working together as in teamwork

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