BIOS 251 Anatomy & Physiology Exam Questions and Answers | Graded A+ | Latest Update 2026

BIOS 251 Anatomy & Physiology Exam Questions and Answers | Graded A+ | Latest Update 2026 Which of the following would you classify as a molecule? Cu Fe N S2F - answer-S2F Which of these subatomic particles is found outside of the nucleus of an atom? Nucleons Protons Neutrons Electrons - answer-electrons Which of the following would you classify as a cation? OHK+ S2- FeO - answer-K+ If we cut a chunk of iron into smaller pieces, is it still iron no matter how small the pieces are? - answer-Yes, an atom of iron would be iron no matter how small the pieces became.A molecule with 14 total electrons and 12 total protons has a charge of? - answer--2 An atom with 55 protons and 54 electrons has a charge of? - answer-+1 An atom with 12 protons and 10 electrons has a charge of? - answer-+2 A molecule with 76 electrons and 73 protons has a charge of? - answer--3 Which of the following would be a molecule? Li CuO Mg C - answer-CuO An atom has a mass number of 48 and 22 neutrons. How many protons would this atom have? - answer-26 Select all the terms we could use to describe an Al atom with a charge of +3. Select all that apply. Anion Ion Molecule Cation - answer-ion, cation If I had an ion with 26 protons, and 28 neutrons, and 27 electrons, what would be the charge of this ion? - answer--1Which of the following compounds would you expect to be an electrolyte? N2 O2 KCI CH4 H2O - answer-KCl An ion has 26 protons, 28 neutrons, and 24 electrons. Which element is this ion? - answer-iron Fe Which of the following terms would you use to describe Mg2+. Select all that apply. Ion Molecule Subatomic particle Element - answer-ion, element What subatomic particle is transferred or shared to make chemical bonds? - answer-electrons What is the name of the bonding type that involves the sharing of electrons? - answer-covalent bonding This type of intermolecular bond is key to how water molecules interreact with each other: - answer-hydrogen bonding Hydrogen bonds are a type of: - answer-intermolecular bond Which of the following solutions would you consider acidic?pH 10 pH 4 pH 7 pH 8 - answer-pH 4 If you were to dissolve 2.5 grams of NaCl in 150 g of water, I would call the NaCl the: - answersolute I mix two liquids together and shake them up. I see that I have microscopic droplets of one liquid suspended in the other. I would call this - answer-emulsion Let us think back to our original cup of tea. We remove the teabag from the cup of tea pictured above. Do you think that this cup of tea is a homogenous or heterogenous solution? Assume when the teabag is removed, no tea leaves remain in the cup. - answer-homogenous solution - answer-Solute particles cannot be visually distinguished from solvent or one another. Cannot be separated by a membrane or by settling out. Usually transparent. colloid suspension - answer-Contains particles large enough to scatter light, and appear cloudy. Can be separated by a membrane but NOT by settling out. Often have gel like consistencies. emulsion - answer-One liquid suspended, but not dissolved in another liquid. Often one liquid is water based and the other is oil based. what are examples of solutions? - answer-salt water, bleach, liquid food coloring what are examples of colloid suspensions? - answer-silica nanoparticles in water, proteins in bloodwhat are examples of emulsions? - answer-Homogeneous mixture of oil and water, butter, homogenized milk You have a mixture that consists of small droplets of olive oil suspended in another liquid. The mixture seems stable. I would call this mixture: - answer-emulsion Seven grams of a salt is dissolved in eight hundred ml of water. The water would be considered the: - answer-solvent universal solvent? - answer-water You add a few drops of a strong acid to a beaker of liquid with a pH of 4.6. After you add the drops of strong acid, the pH remains 4.6. I would estimate that the liquid in the beaker as a: - answer-buffer In a chemical reaction, H3PO4 reacts with another substance and becomes H2PO4-. Based on this, I would expect that this compound acted as - answer-an acid in this reaction key properties of water? - answer-Water is able to dissolve many substances Water molecules are attracted to other water molecules. This property is known as cohesion. Water molecules are able to stick to nearby molecules in a process known as adhesion. Water has a high heat capacity (ability to absorb heat) Water can participate in many chemical reactions. Select all the following solutions that would be expected pH values for basic solutions? Select all that apply. pH 5pH 12 pH 9 pH 10 pH 7 - answer-pH 12, 9, 10 pH of blood? - answer-7.35-7.45 pH of pure water - answer-7 The molecule ethanol would be considered a(n): Amine Ester Carboxylic acid Alcohol - answer-alcohol Select the term for a complex structure made from many small molecules linking together. - answer-polymer In an organic reaction, you observe the formation of water from the mixture of two organic compounds. You may expect this reaction to be a: - answer-dehydration reaction What type of organic molecule would you expect CH3CH2CH2CH2NH2 to be based on the structural formula? why? Carboxylic acid Alcohol Amine Ester - answer-Amine; has a NIf a molecule is made of many small molecules joined together into a large molecule, I would expect this large molecule to be a: - answer-polymer Based on what we have learned in this lesson, which of the following terms would describe the formation of proteins in the body? Select all that apply. Dehydration Hydrolysis Polymerization Catabolism - answer-dehydration, polymerization what is the atom most vital for life? - answer-carbon propane, butane, octane, and methane are.. - answer-hydrocarbons which are the back bone of organic chemistry what are key properties of carbon that are vital for the formation of organic compounds? - answer-Four valance electrons The ability to bond to atoms of other elements The ability to form four bonds What is a key function of carbohydrates in our bodies? - answer-Short term energy What is the term for the simplest type of carbohydrate - answer-monosaccharide Which of the following molecules is a polysaccharide? Select all that apply. Amylose