How can we help?

You can also find more resources in our Help Center.

38 terms

Chapter 1, 2, and 3

The Chemistry of Life
STUDY
PLAY
Scientific Method
series of steps that helps us answer questions
Hypothesis
a tentative explanation a scientist proposes for a specific phenomenon that has been observed.
Experiment
test or trial that helps gain knowledge about something unknown
Variable
capable of being changed
Independent Variable
what is being changed
Dependent Variable
responds to IV
Control
trial that is kept the same
Data
gathered info.
Inferring
guessing based on previously gathered knowledge
Theory
a prediction to what happened
Fact
a true statement
Opinion
an outlook from someone else
Fat
a large lipid molecule made from glycerol and 3 fatty acids; a triglyceride. Most fats function as energy-storage molecules
Lipid
a biological molecule that does not mix with water
Oil
similar to a fat, but saturated
Saturated lipid
fat that consists of triglycerides containing only saturated fatty acid radicals.
Nucleic acid
a polymer consisting of many nucleotide monomers; serves as a blueprint for proteins and, through the actions of proteins, for all cellular structures and activities. The 2 types of nucleic acids are DNA and RNA
Nucleotide
an organic monomer consisting of a five-carbon sugar covalently bonded to a nitrogenous base and phosphate group. Nucleotides are the building blocks of nucleic acids
RNA
ribonucleic acid, a type of acid consisting of nucleotide monomers with a ribose sugar and the nitrogenous bases
DNA
Deoxyribonucleic acid, the genetic material that organisms inherit from their parents
Metabolism
the many chemical reactions that occur in organisms
Atom
the smallest unit of matter that retains the properties of an element
Nucleus
an atom's central core containing protons and neutrons
Element
a substance that can't be broken down by chemical means
Molecule
group of 2+ atoms held together by covalent bonds
Covalent bond
the bond formed by the sharing of a pair of electrons by two atoms
Non-polar bond
two of the same atoms comes together
Polar bond
shares electrons unequally
Polar molecule
a molecule that has opposite charges on opposite ends
Hydrogen bond
type of weak chemical bond formed when the partially positive H atom in one molecule is attracted to the partially negative atom of a neighboring molecule
pH
measure of the acidity
Acid
increases H conc.
Base
increases OH conc.
Solution
a fluid mixture of 2+ substances
Carbon
most important element in the world
Monomer
building block of polymer
Polymer
large molecule with smaller, identical units
Carbohydrate
class of biological molecule