University of New England (UNE )

(Lab Techniques lab) The metric prefix "kilo-" has a decimal equivalent of correct answer: 1000 (Lab Techniques lab) A measure of how close the value of a measurement agrees with a known or accepted value correct answer: accuracy (Lab Techniques lab) The determination of the reproducibility of a measurement correct answer: precision (Lab Techniques lab) To measure the length of an object, the equipment used would be a correct answer: meterstick (Lab Techniques lab) Using signif...

A solid _____________ compound, such as PbCl2 in water, that is classified as insoluble will dissociate ____________. correct answer: ionic, slightly A __________________________ process will only occur under a specific set of conditions when ______________ is continually added. correct answer: non-spontaneous, energy What is defined as a specific configuration of locations and energies for all particles in a system? (one word) correct answer: Microstate If a process is thermodynamic...

A cathode correct answer: is an electrode where reduction occurs In an electrochemical cell based on the following reaction Zn(s) + Cu2+(aq) ⟶ Zn2+(aq) + Cu(s) Which species acts as the anode? correct answer: Zn(s) In the reaction Mg(s) + 2 Ag+(aq) ⟶ Mg2+(aq) + 2 Ag(s) What is the reduction half-reaction? correct answer: 2 Ag+(aq) + 2e- ⟶ 2 Ag(s) When paired with the anode half-reaction Co(s) ⟶ Co2+(aq) + 2 e-; E° = -0.28 V Which of the following cathode half-reactions...

Which of the following is always true? -Spontaneous changes cause an increase in the entropy of the universe -Heat will flow from a cooler object to a hotter object -Processes that involve an increase in entropy of the system are spontaneous -The change in entropy of the universe is the same as the change in entropy of the surroundings correct answer: Spontaneous changes cause an increase in the entropy of the universe A pure, perfectly crystalline solid at 0 K correct answer: has zero ...

When are solubility equilibria established correct answer: when the dissolution and precipitation of a solute species occur at equal rates A solute with finite solubility can yield a saturated solution when it is added to a solvent in an amount exceeding its solubility, resulting in a ______ mixture of the saturated solution and the excess, undissolved solute. correct answer: heterogeneous Equilibrium constant for solubility equilibria correct answer: solubility product constant Ksp ...

intermolecular forces correct answer: the various forces of attraction that may exist between the atoms and molecules of a substance due to electrostatic phenomena kinetic energies correct answer: the energy required to overcome the attractive forces and thus increase the distance between particles Intramolecular forces correct answer: within the molecule that keep the molecule together Intermolecular forces correct answer: attractions between molecules, which determine many of the ...

Intermolecular forces (IMFs) correct answer: the forces of attraction between molecules of covalent compounds (weak) Intramolecular forces correct answer: forces within molecules. Forces caused by the attraction and repulsion of charged particles (strong) Dispersion forces correct answer: present in all molecules attractions between molecules caused by the electron motion on one molecule affecting the electron motion on the other through electrical forces; these are the weakest inter...

solution correct answer: consists of a solvent (dissolving medium) and one or more solutes; most of its properites are dependent on the properties of the solute Colligative properties correct answer: properties of a solution that depend only on the number of particles dissolved in it, not the properties of the particles themselves. The main ones are boiling point elevation and freezing point depression. Boiling point correct answer: temeperature where vapor pressure equals atoms on the ...

A hydrogen bond is characterized by A. the attraction of temporary dipoles produced by the random asymmetries in electron motion B. the electrostatic attraction between the permanent dipoles in any polar molecule C. the highly concentrated partial charge between an H atom and F, O, or N atoms D. the covalent sharing of electrons between two atoms in a molecule correct answer: C. the highly concentrated partial charge between an H atom and F, O, or N atoms (Ref: Week 1 Quiz) A....

The phase in which a substance exists depends on the relative extents of its- correct answer: Intermolecular forces and kinetic energies of its molecules van der Waals forces correct answer: a slight attraction that develops between the oppositely charged regions of nearby molecules Londen dispersion forces correct answer: attraction between two rapidly fluctuating, temporary dipoles; significant only when particles are very close together instantaneous dipole correct answer: a flee...

An enzyme has a mutation within the substrate-binding site that reduces the binding of the coenzyme needed for covalent catalysis. Which of the following is likely to result as a consequence of this mutation? a. the enzyme will use and alternative coenzyme for the reaction b. the enzyme will not be able to bind to the substrate c. The enzyme will not be able to form the transition state complex d. The enzyme will function normally correct answer: c. The enzyme will not be able to form the t...

A 16-year-old girl complains that she often feels light-headed and dizzy just before lunch at school. She tells you that she often does not eat breakfast. She almost always feels better after lunch. You explain to her that she is experiencing hypoglycemia. Under these conditions, you would expect: correct answer: Glycogen phosphorylase kinase to be phosphorylated and active A 3-year old male presents to the emergency room with hypoglycemia folloign a brief seizure. His parents put him to bed...

Cleavage of fructose 1-phosphate into dihydroxyacetone-phosphate and glyceraldehyde 3-phosphate is facilitated by which enzyme? correct answer: aldolase Red blood cells lack mitochondria, therefore glucose is primarily oxidized to which of the following compounds? correct answer: lactate Galactose 1-phosphate is initially converted to glucose 1-phosphate and requires which of the following compounds? correct answer: UDP-glucose Which of the following cofactors is required for transke...

What is the role of adipose in metabolism? correct answer: Storage of triacylglycerols as a source of energy that can be released as FFAs under fasted state conditions; other roles include body weight homeostasis, coagulation, immunity, vascular tone control, appetite regulation, glucose/lipid metabolism, reproduction, angiogenesis what are the direct products of B-oxidation? correct answer: NADH + FADH2 (used in ETC to produce ATP), Acetyl CoA (substrate for ketogenesis, allosteric activat...

In the fasted state, fatty acyl-CoAs are transported across the mitochondrial membrane. The transport of fatty acids via carnitine palmitoyl transferase 1 can be directly inhibited by which of the following compounds? correct answer: Malonyl-CoA An individual is on a hunger strike and has not eaten in 13 days. Which of the following best describes their metabolic state? correct answer: The brain will be preferentially oxidizing ketones. Ketonuria, hyperglycemia and severe acidosis are pr...

Under cellular conditions when cholesterol is low, which of the following is a true statement regarding the sterol response element binding protein ? correct answer: It will be associated with the the sterol response element (SRE) in the DNA Secondary bile salts are generated by bacterial modification of primary bile salts in the intestinal lumen. These modification have which of the following impacts on bile salt solubility? correct answer: decrease solubility LCAT esterifies cholestero...

Cysteine is a nonessential amino acid as it can be synthesized from: correct answer: Methionine All transaminiation reactions require: correct answer: Pyridoxal Phosphate Synthesis of Tyrosine requires: correct answer: Tetrahydrobiopterin (BH4) PKU results from a heritable defect in: correct answer: Phenylalanine hydroxylase Phenylkentonuria can also present as a result of a deficiency in: correct answer: Tetrahydrobiopterin (BH4) Metabolism of Glycine requires: correct answe...

Which of the following reactions is commonly used to replenish intermediates of the citric acid cycle? correct answer: glutamate --> ketoglutarate Which of the following statements is true regarding the activity of the ribonuceltide reductase? correct answer: The enzyme is required to convert nucleotides from the ribose form to the deoxyribose form required for DNA synthesis A Southern blot with a probe (denoted as XXXX in the figure) to DNA isolated from an individual who has both a ...

Which oxidation reaction requires the coenzyme FAD because it involves oxidation of a carbon-carbon single bond to a double bond? correct answer: oxidation of succinate to fumarate Pyruvate dehydrogenase kinase will facilitate which of the following reactions? correct answer: The pyruvate dehydrogenase kinase will phosphorylate and inactivate the pyruvate dehydrogenase complex. Explanation: When the PDC is phosphorylated by pyruvate dehydrogenase kinase, the PDC will become inactive. ...

The second messenger in the signaling cascade initiated by glucagon is: correct answer: cAMP Explanation: The second messenger for glucagon is cAMP. Review Module 2 GPCR signaling cascades When insulin is bound to its receptor an autophosphorylation event occurs and the IRS binds these phosphorylated sites through interactions with the: correct answer: SH2 domain Explanation: SH2 domains bind with phosphorylation sites and allow for docking of the IRS with the insulin receptor. Insulin...