BI 121 TEST QUESTIONS AND ANSWERS GRADED A+
✔✔The specific function of a protein is determined by the: - ✔✔Exact sequence of
amino acids.
✔✔If a substance measures 7 on the pH scale, that substance: - ✔✔Has equal
concentrations of H+ and OH- ions.
✔✔Most biological molecules are joined by: - ✔✔Covalent bonds.
✔✔Phospholipids are unusual yet important to cell membrane structure because they: -
✔✔Have a polar and an a nonpolar end.
✔✔Which of the following provides long-term energy storage for plants? - ✔✔Starch.
✔✔The concept of evolution is based on: - ✔✔Survival and successful reproduction in
organisms with favorable variations.
✔✔Which of the following biological molecules are composed of amino acid subunits? -
✔✔Proteins.
✔✔What type of chemical results in the breakdown of organic polymers into their
respective subunits? - ✔✔Hydrolysis.
✔✔The hydrogen bond between two water molecules forms because water is: -
✔✔Polar.
✔✔Which of the following map possess primary, secondary, tertiary, and quaternary
structures? (Lipids, Proteins, Nucleic acids, Carbohydrates) - ✔✔Proteins.
✔✔A carefully formulated scientific explanation that is based on extensive observations
and is in accord with scientific principles is called a: - ✔✔Theory.
✔✔Atoms or molecules that have gained or lost electrons are called: - ✔✔Ions.
✔✔Polar covalent bonds form when: - ✔✔Electrons are shred unequally between
atoms.
✔✔A basic difference between a prokaryotic cell and a eukaryotic cell is that the
prokaryotic cell: - ✔✔Lacks a nucleus.
✔✔How do buffers work? - ✔✔They accept or release H+.
✔✔The specific function of a protein is determined by the: - ✔✔Exact sequence of
amino acids.
✔✔If a substance measures 7 on the pH scale, that substance: - ✔✔Has equal
concentrations of H+ and OH- ions.
✔✔Most biological molecules are joined by: - ✔✔Covalent bonds.
✔✔Phospholipids are unusual yet important to cell membrane structure because they: -
✔✔Have a polar and an a nonpolar end.
✔✔Which of the following provides long-term energy storage for plants? - ✔✔Starch.
✔✔The concept of evolution is based on: - ✔✔Survival and successful reproduction in
organisms with favorable variations.
✔✔Which of the following biological molecules are composed of amino acid subunits? -
✔✔Proteins.
✔✔What type of chemical results in the breakdown of organic polymers into their
respective subunits? - ✔✔Hydrolysis.
✔✔The hydrogen bond between two water molecules forms because water is: -
✔✔Polar.
✔✔Which of the following map possess primary, secondary, tertiary, and quaternary
structures? (Lipids, Proteins, Nucleic acids, Carbohydrates) - ✔✔Proteins.
✔✔A carefully formulated scientific explanation that is based on extensive observations
and is in accord with scientific principles is called a: - ✔✔Theory.
✔✔Atoms or molecules that have gained or lost electrons are called: - ✔✔Ions.
✔✔Polar covalent bonds form when: - ✔✔Electrons are shred unequally between
atoms.
✔✔A basic difference between a prokaryotic cell and a eukaryotic cell is that the
prokaryotic cell: - ✔✔Lacks a nucleus.
✔✔How do buffers work? - ✔✔They accept or release H+.
