(element)ary
All elements are made of these
atoms
Name three of the four elements that make 90% of living things.
carbon, hydrogen, oxygen and nitrogen
What are the starting substances in a chemical rxn called
reactants
What are examples of carbohydrates?
sugars and starches
What is the positive particle in atoms
proton
This characteristic of water helps water striders and paper clips float.
surface tension; polarity
What does the letter R represent in amino acids?
The variable or different part that identifies the amino acid
Chemical bonds are formed when electrons are rearranged, lost or shared. Name the bonds caused by the transfer and sharing of electrons.
ionic - transfer of electrons; covalent - sharing of electrons
All atoms are identified by and have a unique number of these
protons
Name the negative and neutral particles in an atom
electron and neutron
water molecules have a + and - side the name for this can also mean a very cold area of earth
What is polar
What biomolecule stores genetic information?
nucleic acids
electrons are rearranged, bonds are broken and remade
Atoms of the same element but different numbers of neutrons are -
Isotopes
Water molecules are attracted to each other by opposite electrical charges. This attraction makes this type of bond
hydrogen
Name a difference between carbs and proteins
All chemical energy of molecules is stored here.
in the bonds.
how many subunits does a nucleic acid have? Name one.
What is 3; sugar, phosphate group and base
what do atoms become when they gain or lose electron(s)
ions
Draw three water correctly arranged showing the charges on the atoms.
Hydrogen and oxygen close together. H+ and O-
Name a difference between proteins and nucleic acids
nucleic acids have P and three subunits - sugar, phosphate group and base
Draw a uncatalyzed and catalyzed reaction on a graph
The curve should show reactants with higher energy than products(EXO) and two hills/barriers in the middle. Top hill = uncat. and lower high = catalyst
what does an enzyme/catalyst do in a rxn?
lowers activation energy; makes it easier(less energy req'd) to form a product