Enzymes

1. What are the intermediate( s) in an enzyme catalyzed reaction? The superscript'" sign indicates a transition state. a. ES, EX'" and EP b. ES and EP c. EX'" d. EP 2. A hypothetical enzyme in which the active site is complementary to the substrate will: a. Increase the rate of the reaction. b. Decrease the rate ...continues

Galileo and Gravity

Describe what Galileo did in terms of the scientific method with his gravity experiment? What question did he ask of the universe ? What test did he use to obtain an answer? What did he observe and how did he interpret his observations?

Cells

Which of the following is not a force-generating protein, driven by ATP hydrolysis? a.Tubulin b.Myosin c.Kinesin d.Dynesin 27.Although all the following are inhibitors of microtubule polymerization, which is not used in cancer chemotherapy? a.Vinblastine b.Colchicine c.Vinca alkaloids d.Vincristine 28.Kin ...continues

Find the Concentration of the final solution in terms of molarity.

A standard solution is prepared for the analysis of fluoxymesterone (C20H29FO3), an anabolic steroid. A stock solution is first prepared by dissolving 10.0 mg of fluoxymesterone in enough water to give a total volume of 500.0 mL. A 100.0 microliter aliquot (portion) of this solution is diluted to a final volume of 100.0 mL. Calc ...continues

synthesis/RNA/DNA

1.The basic differences between RNA and DNA are: a.The organic bases only b.Bases, ribose units, and the phosphodiester linkage c.Bases, ribose units, and the glycosidic bond type d.Bases and the ribose units only. 2.The solubility characteristics of the pyrimidine or purine bases and the corresponding nucleosides di ...continues

rna/dna

16.Digestion of the oligonucleotide AGUACAA by pancreatic RNase A would result in which set of products? a.AGUp, ACp. M b.AGU, pAC. pM c.AGp. UAp, CM d.AG. pUA, pCCA 17.How is the radioactivity incorporated into the newly synthesized DNA using the chain termination protocol for sequencing DNA? a.The dideoxynucleoti ...continues

DNA/RNA - 24 Questions

16. What statement is incorrect about the different RNA molecules? a.tRNA contain numerous intramolecular hydrogen bonds between bases. b.There are more distinct tRNA molecules than there are rRNA molecules. c.rRNA are complexed to proteins in the ribosomes. d.The most abundant RNA molecule in the cell is mRNA. 17. D ...continues

Amino acids

Which statement is incorrect about the classification of amino acids? a. Alanine and valine are neutral, nonpolar amino acids. b. Lysine and arginine are basic amino acids. c. Tryptophan and phenylalanine are aromatic amino acids. d. Aspartic acid and aspargine are acidic amino acids. Which of the following amino aci ...continues

Cells/molecules

Which of the following characteristics is associated with the plasma membrane in an eukaryotic cell? a.Signal transduction b.Transport of glucose c.Cell-cell interactions d.All of the above Membrane lipids in a liquid bilyaer are held together primarily by: a.hydrophobic forces b.hydrogen bonds c.electrostatic ...continues

Peptides/DNA

Insulin is a polypeptide hormone that contains two short polypeptide chains linked by two interstrand disulfide bonds. The most logical order of events to perform in order to sequence this protein would be: A: The peptides are reduced with mercaptoethanol. B: The peptides are sequenced using Edman chemistry . C: The peptid ...continues