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Biology 101 Final Exam Questions with Correct Answers
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Biology 101 Final Exam Questions with Correct Answers
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Biology 101 Final Exam Questions withCorrect Answers
Neutron - Answer-A particle with no charge (neither positive nor negative) that is
present in the nucleus is called Neutron
Proton - Answer-a subatomic particle that has a positive charge and that is found in the
nucleus of an atom
Electron - Answer-an elementary particle with negative charge, negatively charged
particle; located outside the atomic nucleus
Mass number - Answer-the total number of protons and neutrons in the nucleus of an
atom
atomic number & mass number - Answer-atomic number- number of protons in one
atom of the element.
mass number- number of protons + number of neutrons in one atom of the element
Isotope - Answer-atoms of the same element that have different numbers of neutrons
ionic bond - Answer-a chemical bond resulting from the attraction between oppositely
charged ions
nonpolar covalent - Answer-Bond formed when electron pairs are shared equally
between atoms.
polar covalent - Answer-a type of bond that forms when electrons are not shared
equally
hydrogen bonds - Answer-very weak bonds; occurs when a hydrogen atom in one
molecule is attracted to the electrostatic atom in another molecule
adhesion - Answer-the clinging of 1 substance to another by means of hydrogen bonds
cohesion - Answer-tendency of molecules of the same kind to stick to one another
surface tension - Answer-A measure of how difficult it is to stretch or break the surface
of a liquid. Water has a high surface tension because of the hydrogen bonding of
surface molecules.
solute - Answer-the dissolved substance in a solution
, solution - Answer-a homogeneous mixture of two or more substances
solvent - Answer-a liquid substance capable of dissolving other substances
acid - Answer-compound that donates H+ ions to an aqueous solution and measures
less than 7 on the pH scale
base - Answer-any substance that forms hydroxide ions in water and has a pH above 7
ph - Answer-A measure of hydrogen ion concentration equal to -log [H+] and ranging in
value from 0 to 14.
4 classes of macromolecules - Answer-A. Carbohydrates. B. Lipids. C. Proteins. D.
Nucleic Acids.
dehydration synthesis - Answer-A chemical reaction in which two molecules covalently
bond to each other with the removal of a water molecule.
hydrolysis - Answer-Breaking down complex molecules by the chemical addition of
water
proteins - Answer-contains carbon, hydrogen, oxygen, and nitrogen. source of energy.
needed by tissue for repair and growth. made up of 20 amino acids.
carbohydrates - Answer-compound made up of carbon, hydrogen, and oxygen atoms;
major source of energy for the human body
lipids - Answer-biochemicals that do not dissolve in water (fats, oils, and waxes) make
up cell membranes, store energy
nucleic acids - Answer-Polymers assembled from individual nucleotides; used to store
and transmit hereditary, or genetic, information; the two kinds of nucleic acids are
ribonucleic acid (RNA) and deoxyribonucleic acid (DNA) (p. 47).
4 structural levels of a protein - Answer-Primary (First), Secondary (Second), Tertiary
(Third), Quaternary (Fourth)
monomer - Answer-a simple compound whose molecules can join together to form
polymers
polymer - Answer-a naturally occurring or synthetic compound consisting of large
molecules made up of a linked series of repeated simple monomers
function of nucleic acid - Answer-stores genetic info and holds instructions for building a
protein
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