Show:
What is biology?
Chemistry
Organic Molecules
Cell Structure/Function
100
Give an example of a physical science and a life science.
Physical science-chemistry and physics Life science-biology, botany, and zoology
100
Name 3 parts of the atom and their charges.
Protons-positive charge Electrons-negative charge Neutrons-neutral charge
100
What is the difference between organic and inorganic molecules?
Organic-contains carbon Inorganic-does not contain carbon
100
What is the basic unit of structure and function in living organisms?
Cells
200
List the 5 steps of the scientific method.
1. Make observation 2. Ask questions 3. Form hypothesis 4. Test hypothesis 5. Draw conclusion
200
How do you figure out the atomic weight and mass?
Atomic mass= protons+neutrons Atomic weight= weighted average of the isotopes (bottom number on periodic table)
200
What is so important about glucose?
Major source of energy for all living organisms
200
What do eukaryotic cells have that prokaryotic cells do not?
Membrane-bound organelles
300
List organization of living things from smallest to largest (11 of them).
Atoms, molecules, cells, tissues, organs, organ systems, organisms, populations, community, ecosystem, biosphere
300
Which bond (covalent or ionic) shares electrons?
Covalent bond
300
Name the four types of organic compounds.
Carbohydrates Proteins Lipids Nucleic acid
300
What is the main function of the mitochondria?
Produce energy currency of the cell (a.k.a. ATP)
400
What is the difference between a hypothesis and a theory?
Theory-widely accepted statement about fundamental concepts that explain why things happen Hypothesis-tentative explanation for a specific case
400
What are 3 characteristics of water?
Liquid at room temperature Universal solvent Good transport medium Gradual change in temperature High heat of vaporization Denser than ice
400
What is the difference between DNA and RNA?
DNA-double stranded helix; has no oxygen; genetic code RNA-single stranded helix; the copy
400
What makes rough endoplasmic reticulum "rough"?
Ribosomes
500
What is a controlled experiment and the two variables involved?
It changes one variable at a time with constant element Independent variable: what is being tested Dependent variable: data that can be quantitative or qualitative
500
What is the difference between hydrolysis and dehydration synthesis?
In hydrolysis, water is added and molecules split apart. In dehydration synthesis, reaction occurs and water is removed.
500
Amino acids are monomers of which organic compound?
Proteins
500
What happens when a cell is hypotonic? Hypertonic?
Hypotonic-concentration of water outside the cell is greater than inside the cell and the cell expands Hypertonic-concentration of water outside the cell is lower than inside the cell and the cell shrinks