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Biology Exam 2
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38
Biology
09/29/2011

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Term
What is an Element?
Definition
All matter can be broken down into basic elements. An element is one pure substance
Term
What are the three different types of elements?
Definition
Bulk (essential in large quantities), Trace (essential in small amounts), and Minerals (and element other than C, H, O, and N
Term
What is an Atom?
Definition
The smallest unit of elements
Term
What is an Isotope?
Definition
Atoms with a different number of neutrons.
Term
An unstable ion is..
Definition
Radioactive
Term
3 parts of an atom
Definition
Electron, Neutron, and Proton
Term
Mass, charge and location of protons
Definition
Has mass, positively charged, in nucleus
Term
Mass, charge, and location of Neutrons
Definition
Has mass, no charge, and in the nucleus
Term
Mass, charge, and location of electrons
Definition
No mass, negative charge, and in orbitals around cells
Term
Atomic number
Definition
The number of protons and electrons
Term
Atomic Mass
Definition
protons and neutrons
Term
3 different types of bonds
Definition
Ionic, Covalent, and Hydrogen
Term
Covalent bonds
Definition
Atoms share electrons, can be polar (unequal sharing) or non-polar (equal sharing)
Term
Ionic Bonds
Definition
one atom transfers electrons to another. Attraction between two oppositely charged ions, forms when one atom strips one or more electrons from another
Term
Hydrogen Bonds
Definition
Attraction of opposite charges on molecules
Term
Ions
Definition
An atom that has gained or lost electrons, has a net negative or positive charge
Term
Examples of Ions
Definition
Hydrogen (H+), sodium (Na+), chloride (Cl-)
Term
Is water cohesive or adhesive?
Definition
Both
Term
Solvent capability of Water
Definition
Water is a universal solvent
Term
Hydrophilic
Definition
Polar and charged
Term
Hydrophobic
Definition
non-polar
Term
Can water dissolve hydrophobic or hydrophilic?
Definition
Hydrophilic
Term
Heat capacity of water
Definition
Boils at 100 C, regulates body temp by resisting change and evaportation
Term
How do you make water acidic?
Definition
Add h+
Term
How do you make water basic?
Definition
Add OH- or remove H+
Term
Water neutral
Definition
H+=OH-
Term
Buffer systems
Definition
Regulate PH
Term
Which bonds does Carbon always make?
Definition
Covalent
Term
Large Organic molecules are made up of
Definition
Subunits
Term
Subunits, called. Join to form two
Definition
Monomers, polymers
Term
What are the 4 macromolecules?
Definition
Carbs, Lipids, Proteins, and Nucleic Acids
Term
Subunits of Carbs
Definition
Simple sugars
Term
Types of Carbs
Definition
Monosaccharides, disacchardies, and polysaccharides
Term
Lipid sub units
Definition
3 fatty acids and glycerol
Term
Examples and purpose of Carbs
Definition
Glucose. Quick energy
Term
Types of lipids
Definition
Triglycerides, sterols, waxes, phospholipids
Term
Examples of lipids
Definition
Canola oil
Term
Saturated and unsaturated
Definition
No double bonds and at least one double bond