CSU BIO EXAM 1 WITH ALL CORRECT & 100% VERIFIED
ANSWERS (UPDATED TO PASS)
Cell Correct answer-lowest level of organization that can perform activities required for life
Basic Features of a Cell Correct answer-1. Enclosed by a membrane
2. Use DNA as genetic information
Eukaryotic Cells Correct answer-has membrane enclosed organelles, cytoplasm, and nucleus w/
DNA
Prokaryotic Cells Correct answer-has DNA in bundles, no nucleus; simple
Taxonomy (Biggest to Smallest) Correct answer-Domain, Kingdom, Phylum, Class, Order, Family,
Genus, Species
Domains Correct answer-Bacteria, Archaea (Prokaryotes)
Eukarya (Exist in extremely hot/salty environments)
Trace Elements Correct answer-required in small amounts
Carbon Atoms Correct answer-Oxygen: 2
Carbon: 4
Hydrogen: 1
Nitrogen: 3
Atomic Number Correct answer-number of protons in a nucleus
Atoms are Composed of Correct answer-Protons, Neutrons (make up nucleus)
Electrons (form a cloud around the nucleus)
John Dalton Correct answer-proposed molecular make of anything
Mass Number Correct answer-sum of protons and neutrons in the nucleus
Atomic Mass Correct answer-total mass; approximated by mass number
Isotopes Correct answer-two atoms of the same element w/ a different number of neutrons
Radioactive Isotopes Correct answer-decay; give off energy particles (ex. 3^H)
Uses for Isotopes Correct answer--Date fossils
-Trace metabolic process of atoms
-Diagnose disorders
Valence Electrons Correct answer-outermost shell (valence shell) that determines chemical
behavior
Covalent Bond Correct answer-sharing of a pair of electrons by two atoms
Molecule Correct answer-consists of two or more atoms held together by a covalent bond
, Electronegativity Correct answer-attraction for the electrons covalent bonds (pulls shared electron
toward itself)
Solution Correct answer-liquid that is a completely homogeneous mixture of substances
Solvent Correct answer-dissolving agent of a solution
Solute Correct answer-substance that is dissolved
Aqueous Solution Correct answer-solution in which water is the solvent
Hydrophilic Correct answer-attracted to water
Hydrophobic Correct answer-not attracted to water
Avagrado's Number Correct answer-6.02 x 10^23 (1 mol)
Molarity Correct answer-moles of solute per liter of solution
pH Scale Correct answer-created to describe a basic/acidic solution
Acid Correct answer-substance that increases the H+ concentration
Basic Correct answer-substance that reduces the H+ concentration
[] Correct answer-concentration
pH Correct answer-the negative log of H+ concentration (pH= -log[H+])
-Acidic solutions have less than 7
-Basic solutions have more than7
-7 means neutral
Buffers Correct answer-substances (acid base pair) that minimize changes in concentrations of H+
and OH- in a solution; holds pH constant
Organic Chemistry Correct answer-study of compounds that contain Carbon
Identifying Carbon Molecules Correct answer-1. Length
2. Branching
3. Position
4. Rings
-two carbons: ethane
-three carbons: propane
-four carbons: butane
-five carbons: pentane
Isomers Correct answer-compounds w/ the same molecular formula but different structures and
properties
-iso'=same 'mers=parts
ANSWERS (UPDATED TO PASS)
Cell Correct answer-lowest level of organization that can perform activities required for life
Basic Features of a Cell Correct answer-1. Enclosed by a membrane
2. Use DNA as genetic information
Eukaryotic Cells Correct answer-has membrane enclosed organelles, cytoplasm, and nucleus w/
DNA
Prokaryotic Cells Correct answer-has DNA in bundles, no nucleus; simple
Taxonomy (Biggest to Smallest) Correct answer-Domain, Kingdom, Phylum, Class, Order, Family,
Genus, Species
Domains Correct answer-Bacteria, Archaea (Prokaryotes)
Eukarya (Exist in extremely hot/salty environments)
Trace Elements Correct answer-required in small amounts
Carbon Atoms Correct answer-Oxygen: 2
Carbon: 4
Hydrogen: 1
Nitrogen: 3
Atomic Number Correct answer-number of protons in a nucleus
Atoms are Composed of Correct answer-Protons, Neutrons (make up nucleus)
Electrons (form a cloud around the nucleus)
John Dalton Correct answer-proposed molecular make of anything
Mass Number Correct answer-sum of protons and neutrons in the nucleus
Atomic Mass Correct answer-total mass; approximated by mass number
Isotopes Correct answer-two atoms of the same element w/ a different number of neutrons
Radioactive Isotopes Correct answer-decay; give off energy particles (ex. 3^H)
Uses for Isotopes Correct answer--Date fossils
-Trace metabolic process of atoms
-Diagnose disorders
Valence Electrons Correct answer-outermost shell (valence shell) that determines chemical
behavior
Covalent Bond Correct answer-sharing of a pair of electrons by two atoms
Molecule Correct answer-consists of two or more atoms held together by a covalent bond
, Electronegativity Correct answer-attraction for the electrons covalent bonds (pulls shared electron
toward itself)
Solution Correct answer-liquid that is a completely homogeneous mixture of substances
Solvent Correct answer-dissolving agent of a solution
Solute Correct answer-substance that is dissolved
Aqueous Solution Correct answer-solution in which water is the solvent
Hydrophilic Correct answer-attracted to water
Hydrophobic Correct answer-not attracted to water
Avagrado's Number Correct answer-6.02 x 10^23 (1 mol)
Molarity Correct answer-moles of solute per liter of solution
pH Scale Correct answer-created to describe a basic/acidic solution
Acid Correct answer-substance that increases the H+ concentration
Basic Correct answer-substance that reduces the H+ concentration
[] Correct answer-concentration
pH Correct answer-the negative log of H+ concentration (pH= -log[H+])
-Acidic solutions have less than 7
-Basic solutions have more than7
-7 means neutral
Buffers Correct answer-substances (acid base pair) that minimize changes in concentrations of H+
and OH- in a solution; holds pH constant
Organic Chemistry Correct answer-study of compounds that contain Carbon
Identifying Carbon Molecules Correct answer-1. Length
2. Branching
3. Position
4. Rings
-two carbons: ethane
-three carbons: propane
-four carbons: butane
-five carbons: pentane
Isomers Correct answer-compounds w/ the same molecular formula but different structures and
properties
-iso'=same 'mers=parts
