Question | Answer |
True or False:The ability of water to retain heat helps cells maintain Homeostasis | True |
T/F:Nonpolar molecules dissolve well in water | False |
T/F:Water molecules attract nonpolar molecules such as oil | False |
T/F:Organic compounds contain carbon atoms are covalently bonded to other elements typically hydrogen oxygen and other carbon atoms | True |
True or false: DNA stores hereditary information that can be used to make proteins | True |
T/F:The amount of energy needed to cause a chemical reaction to start is called activation energy | True |
True or false enzymes speed up a chemical reaction by increasing the activation energy of the reaction | False |
T/F: When an enzyme binds with its substrate the activation energy needed for the chemical reaction occur is increased | False |
Hydrogen bonds can form between regions of polar molecules that are... | Oppositely charged |
The attraction among molecules of different substrates is called... | Adhesion |
Why is water necessary to your body? | It dissolves and transports substances |
Which phrase best describes a solvent? | Present in a greater concentration than solutes |
A solution with a high concentration of Hydrogen ions is... | Very acidic |
Fats oils and cholesterol are all types of... | Lipids |
DNA and RNA are two types of... | Nucleic Acids |
Chemical reactions change substances into different substances by... | Breaking and forming chemical bonds |
Which phrase best describes an exothermic chemical reaction? | Releases more energy than it absorbs |
Which phrase best describes the effect of a catalyst on a chemical reaction? | Decreases the activation energy |
Enzymes affect chemical reactions in living organisms by... | Weakening bonds in reactants |
The specific reactants that an enzyme acts on are called... | Substrates |
The chemical formula shows the... | Kinds of elements found in the Compound |
Nonpolar molecules have... | No negative or positive poles |
When Placed in the same container, oil and water do not mix because... | Water is polar and oil is nonpolar |
Acidic solutions have a pH that is... | Less than seven |
What is the following is not organic macromolecule carbohydrates ice lipids nucleic acid | Ice |
Which of the following organic molecules are classified as carbohydrates amino acids fatty acids nucleotide sugars | Sugars |
all Organic compounds contain the element... | Carbon |
Polysaccharides are... | Carbohydrates |
Lipids are... | Nonpolar molecules |
Long chains of amino acids are found in... | Proteins |
Which of the following is not a lipid saturated fat, starch, cholesterol, earwax | Starch |
Lipids are soluble in... | oil |
Which of the following organic molecules are most closely related to lipids amino acids,fatty acids,nucleotide,sugars | Fatty acids |
Liquid fats called oils contain... | mostly unsaturated fatty acids |
The shape of the protein is primarily determined by... | the shape and sequence of amino acids |
The two types of nucleic acids are... | DNA and RNA |
DNA stores... | Heredity information |
Reducing activation energy... | is accomplished by the action of catalysts on reactants |
A Cell contains... | Thousands of different kinds of enzymes each promoting a different chemical reaction |
The digestive enzyme pepsin works with hydrochloric acid to break down proteins in the stomach. pepsin probably works best in a PH of... | 3 |