Elements
Chemical Reactions
Enzymes
pH
Macromolecules
100
Where can you find all the known elements in one place?
Periodic Table
100
What is a chemical reaction?
The process by which atoms or groups of atoms in substances are reorganized into different substances.
100
What is activation energy?
The minimum energy needed to start a chemical reaction.
100
What is pH?
Measure of the amount of hydrogen ions in a solution.
100
What element is found in proteins but not in carbs or lipids?
Nitrogen
200
What is the nucleus of an atom?
The positively charged center
200
What is an ionic bond? What does it form between?
When two atoms that have opposite charges transfer electrons between them. Metals and nonmetals
200
What is a catalyst?
A substance that lowers the activation energy required for a reaction.
200
What is an acid? What is the pH range?
A solution that has a higher number of hydrogen ions. 0-6.9
200
What plays a role as an energy source? What is an example?
Carbohydrates. Glycogen
300
What is an element?
A pure substance made up of only one kind of atom, it cannot be broken down.
300
What is a covalent bond? What does it form between?
When electrons are shared between atoms. Two nonmetals.
300
What is an enzyme?
A biological catalyst.
300
What is a base? What is the pH range?
A solution with a higher concentration of hydroxide ions. 7.1 - 14
300
What do amino acids make up?
Proteins
400
What are the 3 particles in an atom, what are their charges and where are they located?
neutron - neutral, in the nucleus. proton - positive, in the nucleus. electron - negative, around the outside of the nucleus
400
What is the name for attractive forces between molecules?
Van der Waals forces.
400
What is the active site?
The location where a substrate binds to an enzyme.
400
What is a buffer?
Something that keeps the hydrogen ions and hydroxide ions near neutral.
400
What is the role of DNA and nucleic acids?
store genetic information
500
What are isotopes?
Atoms of the same element that have different numbers of neutrons in the nucleus.
500
What is an atom?
The basic building block of matter.
500
What is a hydrogen bond?
A bond that forms between the hydrogen atom of one molecule and the oxygen atom of another molecule.
500
Why are buffers important for blood?
blood needs to be kept at a pH of 7.4
500
What is the difference between saturated and unsaturated fats?
Saturated fats have only single bonds between the carbon atoms. Unsaturated fats have at least one double bond between carbon atoms.
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