Terms
One of several forms of an element, each containing the same number of protons but a different number of neutrons
What is Isotope
particles found in the nucleus of an atom
What are protons and neutrons?
A covalent bond forms when:
two atoms share a pair of electrons
How many total atoms are in one molecule of C22H44O?
There are 22 C's, 44 H's, and one O. Total of 67 atoms.
Hydrogen bonding
What holds the two helixes in DNA together?
An attractive force that holds molecules of the same substance together
When an atom loses an electron....
It becomes a positively charged ion
A solution with a pH of 5 is:
acidic
If the following molecule is a carbohydrate, what is the value of x? C7HxO2
A carbohydrate has the same ratio of H's to O's as water (2:1) If there are two O's, then there will be four H's
A lipid made from fatty acids that have no double bonds between atoms
What is saturated fat?
A student reports on an atom that has 11 protons, 10 neutrons, and 10 electrons. Why is this incorrect?
An atom must have the same number of protons as electrons.
The 20 amino acids vary only in their
side groups
What is an unsaturated fatty acid molecule?
there is at least one double bond within the fatty acid chain. (see picture)
What is Activation Energy?
Two atoms have the same number of neutrons but different numbers of protons....
They do not belong to the same element
substrate
What determines the properties of a protein?
type, number, and order of amino acids linked together
Two different molecules that have the same chemical formula
What is Isomers
The element sulfur is comprised of all atoms that have 16 protons. How many neutrons are in sulfur-34...
18 neutrons
What does an enzyme do:
lowers the activation energy of a reaction
What part of the nucleotide is responsible for the way DNA stores its information?
The nitrogenous base (nucleotide) is what determines the DNA.