Salmonella (lactose NON-fermenter &hydrogen sulfide producing bacteria) growing on the Salmonella-Shigella Agar will appear as
A. Clear colonies with have black centers due to precipitation of iron salt
B. Clear or amber colonies
C. Blue-black colonies
D. Pink or red colonies
E. Blue-black colonies with green metallic sheen
Answer: A. Clear colonies with have black centers due to precipitation of iron salt
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How is a nerve impulse generated when most sensory receptors are activated?
A. The action potential is converted to a binary code. B. The membrane becomes hyperpolarized. C. The membrane becomes repolarized. D. The membrane becomes depolarized.
Select the following phylum that includes protostome animals that are segmented, bilaterally symmetric, and have a chitinous exoskeleton.
A. Arthropoda B. Annelida C. Mollusca D. Brachiopoda E. Platyhelminthes
Which is NOT true of human chromosomes?
a. The haploid number is 23. b. The diploid number is 46. c. There are 23 pairs of chromosomes. d. Human gametes end up with two of each type of 23 chromosomes. e. Human gametes end up with one of each type of 23 chromosomes.
What Personal Protective Equipment (PPE) should you wear when staining bacteria? (Choose all that apply)
> Biosafety cabinet > Latex or nitrile gloves > Lab coat > Safety glasses or goggles > Respiratory protection