Which of the following would be least likely to form a fossil?
a. a marine organism
b. an organism living in a lake
c. an animal with an exoskeleton
d. an animal with an endoskeleton
e. an organism in the tropical rain forest
e
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Which of the following is not true about Kirby-Bauer disk diffusion method?
A. The diameters of the zones of inhibition are measured to the nearest millimeter. B. The plate is placed at 35°C for 16 to 18 hours of incubation. C. After inoculation of bacteria, the agar surface is dried for about 5 minutes and the appropriate antibiotic test disks are placed on it. D. Bacteria used to swab plate should be at least a week old.
________ is a polymer of glucose.
A. Triglyceride B. Cellulose C. DNA D. Protein E. RNA
Which of the following depicts the correct sequence of protein activity in clot formation?
a. thrombin ? prothrombin ? fibrinogen ? fibrin b. prothrombin ? thrombin ? fibrinogen ? fibrin c. prothrombin ? thrombin ? fibrin ? fibrinogen d. prothrombin ? thrombin ? fibrin e. prothrombin ? thrombin ? fibrinogen ? erythrocytes
Which statement concerning feedback inhibition is false?
A.) feedback inhibition is difficult to reverse B.) feedback inhibition can work almost instantaneously C.) feedback inhibition regulated the flow through biosynthetic pathways D.) feedback inhibition is a feedback system for controlling enzyme activity E.) in feedback inhibition, an enzyme acting early in a reaction pathway is inhibited by a later product of that pathway