University of New England (UNE )

mass correct answer: the amount of matter in the object weight correct answer: the force of gravity on the object volume correct answer: length in three dimensions accuracy correct answer: how close a measurement is to the true value precision correct answer: how close the measurements are to one another acid correct answer: something that produces hydrogen ions (or protons) in a solution base correct answer: something that produces hydroxide ions in a solution monopr...

Which of the following formulas does not represent an organic compound? a. CH3CH2NH2 b. CH4 c. CH3CH2CH3 d. All are organic compounds correct answer: d. All are organic compounds Which of the following is an example of an alkane? a. CH3OH b. C2H4 c. C2H6 d. C6H12O6 correct answer: c. C2H6 How many of carbon's electrons are unpaired and available for bonding according to an sp3 hybridization model? a. 1 b. 2 c. 3 d. 4 correct answer: d. 4 How many hyd...

Acid + Base -> correct answer: Salt + Water Molarity (M) correct answer: Number of moles per liter Titration of Vinegar correct answer: First drops will cause brief appearance of pink that quickly fades Near endpoint, more of the flask will turn pink but still fade after a few seconds Endpoint When entire flask turns pink and stays that way without adding another drop Buffer correct answer: - Solution that resists a change in pH when a small amount of acid or base is added ...

derivatives of ammonia (NH3), where one or more hydrogen atoms have been replaced by an organic (R) group correct answer: amines primary amine secondary amine tertiary amine alphabetically link the names of the alkyl or aromatic groups bonded to the nitrogen and attach -amine so the name is one word use di- or tri- prefixes for identical alkyl groups correct answer: how to common name amines methylamine dimethylamine ethylmethylamine correct answer: examples...

The smallest identifiable unit of an element correct answer: Atom Two or more atoms joined in a specific arrangement correct answer: Molecule The study of matter; the study of the behavior of atoms and molecules correct answer: Chemistry Anything that has mass and occupies space correct answer: Matter In which state of matter do atoms have a fixed volume and rigid shape, vibrate but cannot move past one another, and are tightly packed together in a specific arrangement? correct a...

Mass correct answer: the amount of matter in the object and is independent of where the object is. (Exp.1) Weight correct answer: The force of gravity on the object and is dependent of where the object is. (Exp.1) Volume correct answer: Length is 3 dimensions. (Exp.1) Density correct answer: d=mass/volume in g/mL (Exp.1) Experiment 1 correct answer: Involves finding the density of a pre-1983 penny, a post 1983 penny, an unknown liquid, and an unknown solid. Measuring the pennies...

Succinate is a substrate for which complex in the electron transport chain? a.) Complex 1 (NADH-1 oxidoreductase) b.) Complex IV (Cyt c oxidase) c.) Complex V (ATP synthase) d.) complex II (Succinate-Q reductase) correct answer: Complex II (succinate-Q reductase) (D) Which of the following would be consistent with an exergonic reaction? a.) ∆S would be negative b.) ∆G would be negative c.) ∆S would be positive d.)∆G would be positive correct answer: ∆G woul...

What enzyme is used by the gluconeogenic pathway but NOT in the glycolytic pathway? correct answer: Phosphoenolpyruvate Carboxykinase PEPCK Newborn screening results show a biotinidase deficiency in a 2 day old infant. The deficiency impairs the infant's ability to reuse and recycle biotin. Due to the enzymatic deficiency, the activity of what enzyme is likely impaired? correct answer: Pyruvate carboxylase If unregulated, which of the following pairs of enzymes would represent a futile ...

An

primary structure of protein correct answer: linear sequence of amino acids in the polypeptide chain secondary structure of protein correct answer: alpha helix and beta pleated sheet alpha helix correct answer: formed when the carbonyl group of peptide bond forms a hydrogen bond with the amide nitrogen of another peptide 4 aa down the chain; proline is not commonly found among these structures beta sheets correct answer: can be parallel or antiparallel peptide chains forming rows or...

Under low energy conditions, AMP will bind to phosphofructokinase I and glycogen phosphorylase at site unique to the active site. This enhances the activity of these enzymes. This is an example of which of the follow types of enzyme regulation? correct answer: Allosteric activation An example of enzyme activation by cleavage is best illustrated by which of the following? correct answer: Activation of chymotrypsinogen to chymotrypsin Children with cystinosis have growth delay and both ren...

A 19-year-old boy is diagnosed with Creutzfeldt-Jakob disease which is caused by the introduction of an amyloid fold in the disease-causing protein. The introduction of this fold causes the protein to transition from a primarily alpha helical structure to an aggregate of mostly beta sheets. This change in protein structure (leading to disease) is best attributed to changes in which of the following? correct answer: folding of the secondary structures Which of the following is the best descri...

α-helices and β-sheets are primarily stabilized by which of the following interactions? correct answer: hydrogen bonding Domains are common structural elements that retain a particular function within the protein. Which of the following is an example of a protein domain? correct answer: An arrangement of β-strands connected by α-helices (βαβαβ) How do most enzymes reduce the activation energy needed to move a reaction forward? correct answer: Providing an active site most compl...

Which of the following proteins is likely to have quaternary structure? correct answer: A multimeric protein that contains multiple peptide chains Prosthetic groups are complex nonprotein molecules that participate in catalysis by providing functional groups that form a covalent intermediate between the enzyme and the substrate. Which of the following is an example of a coenzyme or cofactor that participates in a covalent catalysis reaction? correct answer: Pyridoxal phosphate Which of t...

A family presents for genetic counseling. The couple has two female children who are alive and well; however, their infant son recently died in the nursery with severe hemolysis (lysis of red blood cells) and jaundice. The wife recalls she lost a brother in infancy with severe hemolysis, induced after a viral infection. The physician suspects a glucose-6-phosphate dehydrogenase deficiency, this would result in a deficiency in which of the following compounds in red blood cells? correct answer: ...

How do most enzymes reduce the activation energy needed to move a reaction forward? correct answer: Providing an active site most complementary the transition state An enzyme has a mutation within the substrate binding of the coenzyme needed for covalent catalysis. Which of the following is likely to result as a consequence of this mutation? correct answer: The enzyme will not be able to form the transition state complex Hemoglobin has the ability to display cooperative binding while myo...

Succinate is a substrate for which complex in the electron transport chain? a.) Complex 1 (NADH-1 oxidoreductase) b.) Complex IV (Cyt c oxidase) c.) Complex V (ATP synthase) d.) complex II (Succinate-Q reductase) correct answer: Complex II (succinate-Q reductase) (D) Which of the following would be consistent with an exergonic reaction? a.) ∆S would be negative b.) ∆G would be negative c.) ∆S would be positive d.)∆G would be positive correct answer: ∆G woul...

Allopurinol is an inhibitor of Xanthine Oxidase. Addition of this compound will result in a decrease in what compound? correct answer: Uric Acid DNA replication occurs during which phase of the cell cycle? correct answer: S phase The affinity for DNA and histones within a chromosome can be increased by which of the following histone modifications? correct answer: Deaceytlation DNA replication on both the leading and the lagging strand proceeds in the 5' to 3' direction. The remaini...

Dinitrophenol is an example of an: correct answer: uncoupler Explanation: DNP is an uncoupler of the electron transport chain dissipating the proton gradient across the inner mitochondrial membrane. Succinate is a substrate for which complex in the electron transport chain? correct answer: Complex II Explanation: Complex II or Succinate dehydrogenase is coupled to the TCA cycle and accepts succinate rather than malate as a substrate. The oxidation of double bonds is coupled to correct ...

In the malate aspartate shuttle, glutamate is converted to _________ in the mitochondria while aspartate is converted to ___________ in the cytosol correct answer: α-ketoglutarate; oxaloacetate Which of the following describes a correct and complete electron transfer pathway necessary for oxidative phosphorylation? From NADH to ATP synthase correct answer: NADH → complex I → CoQ → complex III → cyt c → complex IV The synthesis of large molecules from smaller compounds is an e...