BIO 201 Unit 1 Exam ACTUAL UPDATED
Exam Questions and CORRECT Answers
What is an atom? - CORRECT ANSWER - The smallest unit of matter
What is a molecule? - CORRECT ANSWER - A structure consisting of two or more
atoms chemically bonded together
What are macromolecules? - CORRECT ANSWER - Large molecules formed by
polymerization
An example of a macromolecule is - CORRECT ANSWER - DNA, RNA
Can elements be broken down to be smaller? - CORRECT ANSWER - No
Structure = ? - CORRECT ANSWER - Function
Periods on the periodic table are what? What do they tell you? - CORRECT ANSWER -
Periods = rows. They tell you the number of electron shells they have.
What are groups on the periodic table? What do they tell you? - CORRECT ANSWER -
Groups = columns. They tell you the number of electrons they have in the outer shell.
If an element has the same number of protons, but a different amount of neutrons, what is it? -
CORRECT ANSWER - Isotope
What is an ion? - CORRECT ANSWER - An atom that has lost or gained charges due to
losing or gaining an electron
, What is a cation? - CORRECT ANSWER - A positively charged ion
What is an anion? - CORRECT ANSWER - A negatively charged ion
What is electronegativity? - CORRECT ANSWER - The ability for an atom to attract
electrons
What is an ionic bond? - CORRECT ANSWER - A bond that's formed when an electron
gets TRANSFERRED from one atom to another
What is a covalent bond? - CORRECT ANSWER - A bond formed when electrons are
SHARED between atoms
What is a polar covalent bond? - CORRECT ANSWER - unequal sharing of electrons (can
share up to 2 bonds)
What are non-polar covalent bonds? - CORRECT ANSWER - Equal sharing of electrons
because of similar electronegativities
What are hydrogen bonds? - CORRECT ANSWER - a weak polar covalent bond (can
share up to 4 bonds)
What do hydrogen bonds do? - CORRECT ANSWER - They create the 3D structure of
important molecules (proteins, nucleic acids, etc.)
What is ionization? - CORRECT ANSWER - electrically neutral atoms are converted to
charged atoms
What can water be ionized into? Is it reversible? - CORRECT ANSWER - H+ and OH-.
Yes.
Exam Questions and CORRECT Answers
What is an atom? - CORRECT ANSWER - The smallest unit of matter
What is a molecule? - CORRECT ANSWER - A structure consisting of two or more
atoms chemically bonded together
What are macromolecules? - CORRECT ANSWER - Large molecules formed by
polymerization
An example of a macromolecule is - CORRECT ANSWER - DNA, RNA
Can elements be broken down to be smaller? - CORRECT ANSWER - No
Structure = ? - CORRECT ANSWER - Function
Periods on the periodic table are what? What do they tell you? - CORRECT ANSWER -
Periods = rows. They tell you the number of electron shells they have.
What are groups on the periodic table? What do they tell you? - CORRECT ANSWER -
Groups = columns. They tell you the number of electrons they have in the outer shell.
If an element has the same number of protons, but a different amount of neutrons, what is it? -
CORRECT ANSWER - Isotope
What is an ion? - CORRECT ANSWER - An atom that has lost or gained charges due to
losing or gaining an electron
, What is a cation? - CORRECT ANSWER - A positively charged ion
What is an anion? - CORRECT ANSWER - A negatively charged ion
What is electronegativity? - CORRECT ANSWER - The ability for an atom to attract
electrons
What is an ionic bond? - CORRECT ANSWER - A bond that's formed when an electron
gets TRANSFERRED from one atom to another
What is a covalent bond? - CORRECT ANSWER - A bond formed when electrons are
SHARED between atoms
What is a polar covalent bond? - CORRECT ANSWER - unequal sharing of electrons (can
share up to 2 bonds)
What are non-polar covalent bonds? - CORRECT ANSWER - Equal sharing of electrons
because of similar electronegativities
What are hydrogen bonds? - CORRECT ANSWER - a weak polar covalent bond (can
share up to 4 bonds)
What do hydrogen bonds do? - CORRECT ANSWER - They create the 3D structure of
important molecules (proteins, nucleic acids, etc.)
What is ionization? - CORRECT ANSWER - electrically neutral atoms are converted to
charged atoms
What can water be ionized into? Is it reversible? - CORRECT ANSWER - H+ and OH-.
Yes.
