Chemistry of Life 1
A substance that cannot be broken down further into simpler matter.
What is an element?
A uniform mixture of two or more substances
What is a solution?
Acidity is measured on this scale.
What is the pH scale?
The sum of all the biochemical reactions in an organism is called this.
What is metabolism?
This is the reaction that generates heat/light energy that is expelled toward the external environment.
What is exothermic reaction?
Subatomic particle with a positive charge.
What is a proton?
Uneven distribution of charge
What is polarity ?
or
What is a polar molecule?
Type of ions produced by bases
What is hydroxides?
The valence electrons of an element of Carbon.
What is 4?
This reaction absorbs heat energy but requires high amount of activation energy.
What is endothermic reaction?
What is a chemical bond?
Made up of atoms of two or more elements in fixed proportions
What are compounds?
A solution that has a high concentration of hydrogen ions.
What is an acid?
In ice-cream making, this is what salt does to the ice-cream mixture.
What is heat absorption to lower the ice temperature?
An atom or a molecule with an electrical charge
What is an ion?
What is a hydrogen bond?
This is what the model of enzyme-substrate complex is called.
What is Lock-and-Key model?
This is the substance that can lower the activation energy in a chemical reaction.
What is an catalyst?
Chemical bond in which electrons are shared.
What is a covalent bond?
How many times does a solution with pH 7 have more [H+] than a solution with pH 12?
105 or 100,000 times
The energy needed to start a chemical reaction
What is activation energy?
This is the site where enzyme combines with substrate to form enzyme-substrate complex.
What is active site?
This is a biological substance that can lower the activation energy in a chemical reaction.
What is an enzyme?