Biology EOC Review: Understanding the Physical, Chemical and Cellular Basis of Life | Lecture notes Chemistry

Biology EOC Review

Goal 2: Learner will develop an understanding of the physical, chemical and cellular basis of life.

Analyze the matter-energy relationships of living and non-living things:

1. What are the differences between living and non-living things: List the 8 characteristics of life: (Page 16)

Made of Cells

Reproduce

Based upon a universal

genetic code

Grow and develop

Obtain and use materials

and energy

Respond to their

environment

Maintain a stable internal

environment

As a group, change over

time

2. What are the ways that living things get energy to live? They have a way to break down materials called

metabolism.

3. What are some of the ways that living things use energy? Chemosynthesis, Photosynthesis, Cell respiration

4. What are some ways that cells maintain homeostasis? Sweating, Panting, Shivering, Cell Membrane

5. How do biological materials respond to acids and bases? (Pages 42-43) What is a buffer? In Acids, H+ ions

are made and in Bases OH- ions are made. A buffer is a solution that prevents sharp changes in pH (about

7).

The chemistry of living things. (Pages 45-47)

6. What element makes all things “organic?” CARBON

(Question 7) 2.01 Compare and contrast the structure and functions of the following organic molecules:

Macromolecules

Function

Subunits

Carbohydrates

Short Term Energy

Glucose

Proteins

Makes up living tissues & organs, also used as enzymes.

Amino Acids

Lipids

Long Term Energy Storage, Protection, Insulation

Glycerol, 3 fatty acid chains

Nucleic Acids

Store Genetic Information

5-carbon sugar, Nitrogen base,

Phosphate group.

Specific Molecule

Function

Subunits

Starch

A macromolecule of sugar used for short term or quick

energy.

Glucose

Cellulose

A macromolecule of sugar used to make cell walls in

plants.

Glucose

Insulin

A protein used in the breakdown of sugar made by the

pancreas. Without it, causes Diabetes.

Amino Acids

Glycogen

Storage of excess sugar in the liver and used when glucose

levels in the blood is low. (Secondary storage also called

“Animal Starch.”)

Glucose

A molecule used to create Glycogen, sugars needed by the

brain for life functions.

Carbon, Oxygen, Hydrogen

Enzymes

Proteins used to lower activation energy to cause

chemical reactions to occur.

Amino Acids

Hemoglobin

The protein used to bind to Oxygen to carry it in the red

blood cells.

Amino Acids

Fats

Long term energy storage, protection and insulation

Fatty acid & 3 glycerol chains

DNA

Genetic code of Life used in replication & transcription.

T, A, G, C

RNA

Genetic code of Life used in transcription & translation.

U, A, G, C

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Goal 2: Learner will develop an understanding of the physical, chemical and cellular basis of life. Analyze the matter-energy relationships of living and non-living things:

What are the differences between living and non-living things : List the 8 characteristics of life: (Page 16) Made of Cells Reproduce Based upon a universal genetic code Grow and develop Obtain and use materials and energy Respond to their environment Maintain a stable internal environment As a group, change over time 2. What are the ways that living things get energy to live? They have a way to break down materials called metabolism.
What are some of the ways that living things use energy? Chemosynthesis, Photosynthesis, Cell respiration
What are some ways that cells maintain homeostasis? Sweating, Panting, Shivering, Cell Membrane
How do biological materials respond to acids and bases? (Pages 42-43) What is a buffer? In Acids, H+ ions are made and in Bases OH- ions are made. A buffer is a solution that prevents sharp changes in pH (about 7). The chemistry of living things. (Pages 45-47)
What element makes all things “organic?” CARBON (Question 7) 2.01 Compare and contrast the structure and functions of the following organic molecules: Macromolecules Function Subunits Carbohydrates Short Term Energy Glucose Proteins Makes up living tissues & organs, also used as enzymes. Amino Acids Lipids Long Term Energy Storage, Protection, Insulation Glycerol, 3 fatty acid chains Nucleic Acids Store Genetic Information 5 - carbon sugar, Nitrogen base, Phosphate group. Specific Molecule Function Subunits Starch A macromolecule of sugar used for short term or quick energy. Glucose Cellulose A macromolecule of sugar used to make cell walls in plants. Glucose Insulin A protein used in the breakdown of sugar made by the pancreas. Without it, causes Diabetes. Amino Acids Glycogen Storage of excess sugar in the liver and used when glucose levels in the blood is low. (Secondary storage also called “Animal Starch.”) Glucose Glucose A molecule used to create Glycogen, sugars needed by the brain for life functions. Carbon, Oxygen, Hydrogen Enzymes Proteins used to lower activation energy to cause chemical reactions to occur. Amino Acids Hemoglobin The protein used to bind to Oxygen to carry it in the red blood cells. Amino Acids Fats Long term energy storage, protection and insulation Fatty acid & 3 glycerol chains DNA Genetic code of Life used in replication & transcription. T, A, G, C RNA Genetic code of Life used in transcription & translation. U, A, G, C

Describe the following nutrient tests: What is used to test for them? Nutrient Type of Test Positive Test Example of…? Starch Iodine When present, goes from brown to red. Pasta Lipids Paper Bag Test When present, causes a greasy stain. Chips, Butter Monosaccharides Benedicts When heated turns from blue to orange. Milk, fruit Protein Biurets When present turns blue to purple. Meats, some legumes 2.02 Investigate and describe the structure and function of cells including cell organelles, cell specialization, and communication among cells within an organism. Cell theory and Organelles. (Chapter 7)
1. What does the term “membrane bound organelles mean?” What cell type are they found in? “ Tiny organs” with unique functions covered in a fatty membrane. They are found in Eukaryotic cells ONLY!
2. What are the three parts of cell theory? 1. All living things are composed of cells. 2. Cells are the basic units of all living things. 3. New cells are produced from preexisting cells. The diagram below shows many proteins and other molecules embedded in a cell membrane. (Page 182)
3. What is the function of the cell membrane? It is a fluid-mosaic. It is a semi-permeable barrier that allows only certain molecules in & out of the cell.
4. What are some of the functions of these proteins and other molecules? Some proteins on the surface are used for detecting materials, channel proteins let certain substances pass through. Cholesterol prevents the sticky phospholipids heads from sticking to one another. The hydrophilic areas attract water molecules and the hydrophobic areas repel water molecules.
Put the following steps for making a wet mount slide in order. A. Once the object is located, without moving the adjustment, change to medium power. B. Put the tissue on the slide. C. Switch to high power and bring the object into clear focus again. D. Add a coverslip. E. Place the slide on the stage of the microscope. F. Add a drop of water. G. Try to locate the object using low power and coarse adjustment. H. Use fine adjustment to bring the object into clear focus. Order: B, F, D, E, G, A, C, H
Why must you use stain to look at certain items under the microscope? Because certain substances and organisms are clear and need stain in order to be visible under the microscope.
Draw how the letter “e” would look as view through a microscope? Upside down and backwards.
Put the following in order from smallest to largest: Organ systems Cells Organs Tissues Key: 4 1 3 2
What structures produce hormones? What is the function of hormones? (Pages 634, 997) They are slow acting chemical messengers released by the endocrine system. They are chemical substances that control growth, development and responses to the environment.
How do hormones travel throughout a body? Since many hormones are lipids, they pass through cell membranes.

2.03 Investigate and analyze the cell as a living system including: maintenance of homeostasis, movement of materials into and out of cells, and energy use and release in biochemical reactions. Chemical Bonding.

What are chemical bonds? (Pages 38 - 39) What are the two major types? Bonds that keep atoms together. Ionic bonds are transferred electrons between metals and non-metals and Covalent bonds are shared electrons between nonmetals.
Describe the relationship between breaking and forming bonds and the release or use of energy. When a bond is broken, this releases energy. When bonds are formed, this uses energy.
What do the lines between chemical symbols represent? (Page 35) +/- attraction due to electrons.
Do all bonds have the same strength? Explain (Pages 38-39) No, hydrogen bonds are the weakest with ionic bonds next. Covalent bonds are the strongest types of bonds.
What are valence electrons and how are they involved in bonding? They are the outermost electrons and are only used in bonding. Explain what has happened in the diagram to the left.
1. Why did the large dark molecules NOT move to the left? They are too large to pass through the semi-permeable membrane.
2. How is the semi-permeable membrane like a cell membrane? Allows some substances through while keeps other out.
3. If the dark molecule is starch, where is the starch concentration greatest (left or right)? Neither, Equal.
If the white molecule is water, where is the water concentration greatest at first? It is highest on the left.
In osmosis, water moves from an area of higher concentration to an area of lower concentration. (higher/lower)
If the dark molecules could move, in what direction would they move? Why? To the left, it is lower there.
In diffusion, molecules move from an area of higher concentration to an area of lower concentration. (higher/lower)
What is osmotic pressure? It is the balance between the intake and loss of water; prevents the cell from bursting.
Which way wate r will move in each of the following situations: a. Salt inside the cell 65% and outside the cell 40%. Water will move inside the cell (lower.) b. Sugar inside the cell 27% and outside 80%. Water will move outside the cell (lower.)
What is homeostasis? Maintaining a balance of chemicals, fluids, etc inside of a living organism.
How do cells maintain homeostasis? They use the cell membrane (cell wall in plants) as well as stimulus/response, buffers, hormones, cell organelles, and internal (positive and negative) feedback loops 47. Comparison of active and passive transport PASSIVE TRANPORT ACTIVE TRANSPORT Requires energy? NO YES Low to high concentration or high to low concentration? High to Low Low to High Examples Osmosis Muscle pumps

Energy use and release in biochemical reactions.

Use the following diagram to show where energy is released and where energy is used. Also use arrows on the lines attached to the circles to indicate the direction of the energy.
How many phosphates? ATP? 3 ADP? 2 AMP? 1
What cellular process produces ATP? ATP synthesis by ATP synthetase in the mitochondria
What is ATP energy used for? (Page 202) Give examples. Making proteins, replicating DNA, cell responses, pumps working, muscle contraction, everything! 2.05 Investigate and analyze the bioenergetic reactions.
What are the reactants and products for each of these? (Chapter 9) Process Reactant Product Example? Photosynthesis Water, Sunlight, Carbon Dioxide (CO2) Sugar & Oxygen (O2) Plants/Autotrophs/Producers Cellular Respiration (Aerobic) Sugar & Oxygen (O2) Water, Carbon Dioxide (CO2), 36 ATP Humans/Heterotrophs/ Consumers Cellular Respiration (Anaerobic) Sugar Carbon Dioxide (CO2), 2ATP Tired Muscles, yeast 53. Which reaction makes the most ATP? Aerobic Respiration (Makes up to 36 ATP) What gas is the final electron acceptor? Oxygen
How do factors such as pH, temperature, light and food availability affect these reactions? Extremes may decrease the effectiveness of this reaction.
Label the following molecules in these equations ( water (H2O), glucose (C6H12O6) oxygen (O2), carbon dioxide (CO2), ethyl alcohol (C2H5OH )

A)

B)

C)

Which of the above reactions is photosynthesis? A
Which of the above reactions is fermentation (anaerobic cellular respiration)? C
Which of the above reactions is cellular respiration (aerobic)? B
Which reaction(s) requires or stores energy? All require some form of energy, A stores it.
Which reaction(s) release energy (ATP)? All release some form of energy, mostly B and C
Which reaction releases the most energy? B because it uses oxygen as the final electron acceptor. 62. Which reaction requires chlorophyll? A, chlorophyll traps light energy for photosynthesis. Which reaction requires light? A, light begins the light dependent reaction for photosynthesis.
Which organisms carry out process A? Plants, Autotrophs and other Producers (Algae)
Which organisms carry out process B? Most Animals, Heterotrophs and Consumers 65. Which organisms carry out process C? Yeast and other anaerobic organisms.
Which process uses chloroplasts in eukaryotes? Process A only. (Plant Cells)
Which process uses mitochondria in eukaryotes? Processes A and B (Plant and Animal Cells)
Compare and contrast: Alcoholic Fermentation and Lactic Acid Fermentation. (# ATP, where it occurs) Alcoholic Fermentation occurs in yeast and releases alcohol as a byproduct whereas lactic acid fermentation occurs in tired muscle cells deprived of oxygen resources. Both produce only 2 ATP.

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A)

B)

C)