BIO 253 EXAM 1 2026 FINAL PAPER COMPLETE
QUESTIONS AND ANSWERS FULL SOLUTION
◉ Ionic Bond.
Answer: Electrical attraction between oppositely charged ions.
◉ Covalent Bond.
Answer: Sharing of electrons between atoms.
◉ Hydrogen Bond.
Answer: Weak bond between polar molecules.
◉ pH Scale.
Answer: Measures acidity or alkalinity of a solution.
◉ Acids.
Answer: Substances that donate protons in solution.
◉ Bases.
Answer: Substances that accept protons in solution.
, ◉ Carbohydrates.
Answer: Organic compounds primarily used for energy.
◉ Lipids.
Answer: Nonpolar molecules, essential for energy storage.
◉ Proteins.
Answer: Polymers of amino acids performing various functions.
◉ Nucleic Acids.
Answer: Molecules made of nucleotides; DNA and RNA.
◉ Cell Membrane.
Answer: Barrier made of lipid bilayer and proteins.
◉ Cytoplasm.
Answer: Fluid within cells containing organelles.
◉ Mitochondria.
Answer: Organelles that produce ATP through respiration.
◉ Microvilli.
QUESTIONS AND ANSWERS FULL SOLUTION
◉ Ionic Bond.
Answer: Electrical attraction between oppositely charged ions.
◉ Covalent Bond.
Answer: Sharing of electrons between atoms.
◉ Hydrogen Bond.
Answer: Weak bond between polar molecules.
◉ pH Scale.
Answer: Measures acidity or alkalinity of a solution.
◉ Acids.
Answer: Substances that donate protons in solution.
◉ Bases.
Answer: Substances that accept protons in solution.
, ◉ Carbohydrates.
Answer: Organic compounds primarily used for energy.
◉ Lipids.
Answer: Nonpolar molecules, essential for energy storage.
◉ Proteins.
Answer: Polymers of amino acids performing various functions.
◉ Nucleic Acids.
Answer: Molecules made of nucleotides; DNA and RNA.
◉ Cell Membrane.
Answer: Barrier made of lipid bilayer and proteins.
◉ Cytoplasm.
Answer: Fluid within cells containing organelles.
◉ Mitochondria.
Answer: Organelles that produce ATP through respiration.
◉ Microvilli.