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BIO 112 Chapter 2
Chapter 2
131
Biology
Undergraduate 1
01/13/2021

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Term
Chemistry
Definition
____ deals with the composition of matter and how it changes
Term
Matter
Definition
____ is anything that has mass (weight) and volume (takes up space)
Term
Elements
Definition
Matter is made up of substances known as ____, of which there are about 90 different naturally occurring substances.
Term
Name the 6 elements that make up 98% of the human body
Definition
Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur
Term
Trace
Definition
Iron, copper, and zinc are examples of _____ elements needed by the body.
Term
Solid, liquid, gas
(no particular order)
Definition
The three states of matter are ___, ____, and ____
Term
atom
Definition
The simplest, complete particle of matter is the ___
Term
Molecule
Definition
A ___ is formed when two or more atom chemically combine.
Term
Compound
Definition
A molecule that is made up of atoms of different elements can also be called a _______
Term
Molecules
Definition
A substance that is made of 2 or more atoms chemically combine that are atoms of the same elements are usually referred to as _______
Term
Protons, neutron, electrons
Definition
Name the 3 particles that make up an atom
Term
Periodic Table of Elements
Definition
Each element has its own type of atom identified on the _____ by the number of protons in the atom
Term
Protons
Definition
_____ are atomic particles that have a positive charge and are located within the nucleus of an atom
Term
Neutron
Definition
_____ are atomic particles that have a neutral (no) charge and are located within the nucleus of an atom
Term
Electrons
Definition
___ are atomic particles that have a negative charge and are in orbitals (energy levels) surrounding the nucleus of an atom
Term
Proton, Neutron
Definition
Which two atomic particles make up the mass of an atom?
Term
Proton
Definition
The atomic number of each element, on the Periodic Table, represents the number of ____ in the atom of an element
Term
Protons, Neutrons
Definition
The atomic mass number for each element, on the Periodic Table, is the total number of ____ and ____ found in the nucleus of an average atom for an element
Term
Atomic mass number – Atomic number = #of neutrons
Definition
Describe how to calculate the number of neutrons in the nucleus of an average atom for an element
Term
Isotopes
Definition
Atoms of the same elements, with different atomic masses are known as _______.
Term
Neutrons
Definition
Isotopes are atoms of the same element with different numbers of _____ in their nucleus, causing different atomic mass numbers. Example C12 vs C14
Term
Protons
Definition
For a balanced atom, the number of electrons equals the number of _____ for the atom of an element
Term
20
Atomic number
Definition
Use the Periodic Table to answer the following question:
How many protons are in an atom of Calcium (Ca)?
Term
20
39 – 19 = 20
Atomic mass number – Atomic number
Definition
Use the Periodic Table to answer the following question:
How many neutrons are in an atom of Sodium (Na)?
Term
16
Atomic number
Number of protons = electrons in a balanced atom
Definition
Use the Periodic Table to answer the following question:
How many protons are in a balanced atom of Sulfur (S)?
Term
2
Definition
Atomic structure
How many electrons fill the orbital (energy level) closest to the nucleus of an atom? (first energy level)
Term
8
Definition
Atomic structure
How many electrons fill the 2nd orbital (energy level) from the nucleus of an atom?
Term
Nucleus
Definition
Atomic structure
When filling orbitals (energy levels) with electrons, you fill the orbitals closest to the ____ before moving to the next orbital (energy level)
Term
Valance
(outer most)
Definition
Which orbital (energy level) is important for chemical bonding?
Term
Ionic bond
Definition
Chemical Bonds
A chemical bond formed between ions is known as a _____
Term
Ion
Definition
A/An ___ is an atom that that lost or gained electrons
Term
Cation
(positive ion)
Definition
A/An ____ is an atom of an element that has lost an electron
Term
Anion
(negative ion)
Definition
A/An is an atom of an element that has gained an electron
Term
Na
(Sodium)
Definition
In the compound NaCl, which element’s atom is the cation?
Term
Cl
(chlorine)
Definition
In the compound NaCl, which element’s atom is the anion?
Term
Cation
(positive ion)
Definition
A hydrogen atom that has lost an electron forms a _____?
Term
Anion
Negative ion)
Definition
The polyatomic ion (OH)- is a/an ____ ion
Term
Hydroxide
(hydroxyl)
Definition
(OH)- is also known as the functional group ____ in macromolecules
Term
Covalent
Definition
A ____ bond is formed with atoms form molecules by sharing electrons.
Term
Polar
Definition
A ____ covalent bond is form when atoms unequally share electrons to from molecules
Term
Nonpolar
Definition
A ___ covalent bond is formed when atoms equally share electrons to from molecules
Term
Charged
(+, -)
Definition
There will be ____ areas within molecules that are formed by polar covalent bonds
Term
Nonpolar
Definition
Molecules formed with ____ covalent bonds do not have charges
Term
Hydrogen
Definition
An attraction between charged areas within molecules or between different charged molecules is known as a/an ______ bond
(example: attraction between water molecules)
Term
Chemical reaction
Definition
A _______ occurs as bonds are formed or broken between atoms, ions, or molecules.
Term
Reactants
Definition
Atoms or molecules changed during a chemical reaction are the ______
Term
Products
Definition
Atoms or molecules produced during a chemical reaction are the ____
Term
Synthesis
Definition
Chemical reactions where smaller molecules are joined into larger molecules are known as _____ reactions
Term
Decomposition
Definition
Chemical reactions where larger molecules are broken into smaller molecules are known as ____ reactions
Term
Dehydration synthesis
Definition
A synthesis reaction where molecules are joined to form larger molecules by removing a molecule of water is known as a ____ reaction
Term
Hydrolysis
Definition
A decomposition reaction where molecules are broken into smaller molecules by the addition of water is known as a ____ reaction
Term
Catalyst
Definition
A ____ is a substance that affects the speed of a chemical reaction.
Term
Enzymes
Definition
______, specialized proteins, are known as biological catalyst that speed up chemical reactions in the body
Term
Electrolytes
Definition
Substances that release ions when dissolved in water are known as ____
Term
Acids
Definition
Substances that release H+ (hydrogen ions) in water are known as ____
Term
Bases
Definition
Substances that release (OH)- (hydroxyl ions) in water are known as ______
Term
pH
Definition
The ___ is a measure of the concentration of H+ ions in a solution
Term
Acid
Definition
A substance with a pH below 7 is known as a/an ____.
Term
Base
Definition
A substance with a pH above 7 is known as a/an ___
Term
Homeostatic
Definition
Changes in pH within the body are monitored through ______ mechanisms to keep the pH within a specific range.
Term
Buffer
Definition
A ___ is a substance that resist a change in pH
Term
Neutral
Definition
A substance with a pH of 7 is said to have a/an ___ pH
Term
7.4
Definition
Human blood has a normal pH of ____
Term
Tenfold
Definition
Between each whole number of the pH scale there is a ____ difference in hydrogen ion concentration.
Term
100
Definition
On the pH scale a substance with a pH of 4 has a concentration of H+ ions ____ times more than a substance with a pH of 6.
Term
Organic
Definition
____ Compounds always contain both carbon and hydrogen at the same time and are formed with covalent bonds and maybe large molecules
Term
Inorganic
Definition
____ Compounds do not contain carbon and hydrogen at the same time, most are formed with ionic bonds, and are usually smaller molecules
Term
Inorganic
Definition
Water, H2O, is classified as a/an ____ molecule
Term
Solvent
Definition
Water is an important ______ so that metabolic reactions can occur
Term
Oxygen
Definition
The inorganic molecule ____ is needed so that energy can released from food molecules during aerobic cellular respiration
Term
Carbon dioxide
Definition
The inorganic substance ____ is released during energy releasing metabolic processes as a waste product
Term
Inorganic
Definition
Carbon dioxide, CO2, is classified as a/an ___ molecule.
Term
Organic
Definition
Methane, CH4, is classified as a/an ____ molecule
Term
Macromolecules
Definition
Large organic molecules that are made up of repeating units and are important to life, are known as __________
Term
Carbohydrates, Lipids, Proteins, Nucleic Acids
Definition
Name the four classifications of macromolecules important for life
Term
Carbohydrates
Definition
_______ is a group of macromolecules that provide energy for cellular activities and are composed of carbon, hydrogen, and oxygen.
Term
Monosaccharides
Definition
The monomer (basic unit) for carbohydrates is the ________
Term
Glucose, fructose, galactose also ribose and deoxyribose could be named
Definition
Name three examples of monosaccharides
Term
Disaccharides
Definition
Two carbohydrate monomers linked together form __________
Term
Polysaccharides
Definition
Three or more carbohydrate monomers linked together form ________
Term
Sucrose
Definition
_____ is a disaccharide form from linking together a glucose and a fructose molecule.
Term
Starches
Definition
A polysaccharide made up of many glucose molecules, produced by plants, are the ______. Used for glucose storage in plants
Term
Glycogen
Definition
A polysaccharide used for glucose storage in our bodies is ____, which is stored in muscles and the liver.
Term
Glucose and Galactose
Definition
Which two monosaccharides make up the disaccharide lactose?
Term
2 glucose molecules
Definition
Which two monosaccharides make up the disaccharide maltose?
Term
Lipids
Definition
______ are organic substances (macromolecules) that are insoluble in water and include triglycerides (fats), phospholipids, and steroids.
Term
Glycerol
Fatty acid chains
Definition
Fats are made up of one ____ joined to three ______
Term
Saturated
Definition
A ____ fat has no double bonds within the fatty acid chains
Term
Unsaturated
Definition
A/an ____ fat has at least one double bond within the fatty acid chains
Term
Saturated
Definition
____ fats are usually solids at room temperature and produced by animals
Term
Unsaturated
Definition
____ fats are usually liquids at room temperature and produced by plants
Term
Phospholipids
Definition
_____ are specialized lipids making up cell membranes
Term
Phospholipids
Definition
______ are made up of a glycerol, two fatty acids and a phosphate
Term
Steroids
Definition
_____ are made up of four complex rings and include cholesterol.
Term
Proteins
Definition
_______have a great variety of functions in the body--as structural materials, as energy sources, as certain hormones, as receptors on cell membranes, as antibodies, and as enzymes to catalyze metabolic reactions.
Term
Amino acids
Definition
The monomers (basic units) of proteins are the ________
Term
Peptide
Definition
Amino acids are linked together with a special bond called a ______ bond
Term
Primary,
secondary, tertiary, quaternary
Definition
Name the four levels of structure that can be found in protein molecules
Term
Primary
Definition
The order of the amino acids with the polypeptide chain makes up the ____ level of protein structure
Term
Secondary
Definition
Folding or twisting of the polypeptide chain due to hydrogen bonds, make up the ____ level of protein structure.
(forms alpha helix or beta sheets)
Term
Tertiary
Definition
Forming of the unique structure of a protein makes up the ____ level of protein structure.
Term
Quaternary
Definition
Interaction between two or more polypeptide chains to from a complete protein makes up the ____ level of protein structure.
Term
Nucleic Acids
Definition
_____ are macromolecules that make up genes
Term
Nucleotide
Definition
The monomers (basic units) of nucleic acids are known as _____
Term
Sugar (ribose or deoxyribose), phosphate group, nitrogen base
(A, T, G, C, U)
Definition
Name the three major parts of a nucleotide
Term
Nucleic Acids
Definition
DNA, RNA and ATP are classified as ______
Term
Deoxyribonucleic Acid
Definition
DNA stands for _____
Term
Ribonucleic Acid
Definition
RNA stands for ____
Term
Adenosine Triphosphate
Definition
ATP stands for _____
Term
Double helix
Definition
DNA has the shape of a ______
Term
Stores
Definition
DNA ____ genetic information which are the instructions for protein synthesis
Term
Deoxyribose
Definition
The sugar in DNA is _____
Term
Adenine, Thymine, Guanine, Cytosine
Definition
The four nitrogenous bases in DNA are _______________
Term
Thymine
Definition
In a DNA molecule, Adenine is hydrogen bonded to ______
Term
Cytosine
Definition
In a DNA molecule, Guanine is hydrogen bonded to _____
Term
Single helix
Definition
RNA has the shape of a _______
Term
Ribose
Definition
The sugar in RNA is _____
Term
RNA
Definition
_____ decodes the protein instruction of DNA for protein synthesis
Term
Adenine, Uracil, Guanine, Cytosine
Definition
The nitrogenous bases found In RNA are _____________
Term
Energy
Definition
ATP is produced during cellular respiration and is the source of cellular ________
Term
Ribose sugar, Adenine and Three phosphates
Definition
Describe the basic structure of ATP
Term
Glucose
Definition
[image]
Term

Triglyceride

Definition
[image]
Term
Saturated
Definition

[image]

Is this molecule an example of a saturated or unsaturated fat?

Term

Unsaturated fat

(last fatty acid chain contains a double bond)

Definition

[image]

Is this molecule an example of a saturated or unsaturated fat? 

Term
Amino acid
Definition
[image]
Term

DNA

Deoxyribonucleic Acid

Definition
[image]
Term

RNA

Ribonucleic Acid

 

Definition
[image]
Term

ATP

Adenosine Triphosphate

 

Definition
[image]
Term
Basic steroid structure
Definition
[image]
Term
Phospholipid
Definition
[image]
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