Bio250 Exam 2025 Questions with Accurate
Solutions
What is metabolism?
a broad term that includes the sum of chemical reactions that occur within the body
What is matter?
Anything that has mass and takes up space
What is Immunology
study of the immune system and how the body fights infection and defends itself
What is Serology?
The study of blood serum, that carries disease fighting chemicals
What do Vaccines do for the body?
protect itself from repeated diseases by the same organism
What are "Magic bullets"
fleming - penicillin 1st true antiboiotic
Domagk- sulfa first synthetic antimicrobial
Describe the structure of an atom
Atoms consist of electrons surrounding a nucleus that contains protons and neutrons.
mass number= proton and neutrons
atomic number= protons
What are the different interactions between atoms?
Covalent bonds- share electrons between H2O
Ionic bonds- donation of electron NaCl
Van der waal forces
, What is the relative electronegativity scale?
What does it determine?
Nonpolar - E shared equally atoms have no charge
H2, CH4
polar - E shared unequally
NH3 H2O
True or false: water is nonpolar
False
True or false: Atoms with more than one unpaired electron in the valence shell can form
double or triple covalent bond
True
True or false: the loss and gain of an electron causes atoms to have a charge (ionic bonds)
True
Cations- positive loss of electrion Na+
Anions- negative gain of electron Cl-
What do all organic molecules have in common?
C and H linked by covalent bonds
most have O, N, P, S
What are the four classes of macromolecules?
Protein
carbohydrates
nucleic acids
lipids
Describe the classes of chemical reactions
Solutions
What is metabolism?
a broad term that includes the sum of chemical reactions that occur within the body
What is matter?
Anything that has mass and takes up space
What is Immunology
study of the immune system and how the body fights infection and defends itself
What is Serology?
The study of blood serum, that carries disease fighting chemicals
What do Vaccines do for the body?
protect itself from repeated diseases by the same organism
What are "Magic bullets"
fleming - penicillin 1st true antiboiotic
Domagk- sulfa first synthetic antimicrobial
Describe the structure of an atom
Atoms consist of electrons surrounding a nucleus that contains protons and neutrons.
mass number= proton and neutrons
atomic number= protons
What are the different interactions between atoms?
Covalent bonds- share electrons between H2O
Ionic bonds- donation of electron NaCl
Van der waal forces
, What is the relative electronegativity scale?
What does it determine?
Nonpolar - E shared equally atoms have no charge
H2, CH4
polar - E shared unequally
NH3 H2O
True or false: water is nonpolar
False
True or false: Atoms with more than one unpaired electron in the valence shell can form
double or triple covalent bond
True
True or false: the loss and gain of an electron causes atoms to have a charge (ionic bonds)
True
Cations- positive loss of electrion Na+
Anions- negative gain of electron Cl-
What do all organic molecules have in common?
C and H linked by covalent bonds
most have O, N, P, S
What are the four classes of macromolecules?
Protein
carbohydrates
nucleic acids
lipids
Describe the classes of chemical reactions
