If the hydrogen ion concentration of ammonia is 0.00000000001 mol/L, then what is its pH value?

a. 1
b. 10
c. -10
d. 11
e. -11


d

Biology & Microbiology

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A researcher is studying eukaryotic cells that shows an abnormal pattern of surface glycosylation. The researcher determines that these cells have normal levels of glycolipids and integral membrane proteins with O-linked glycosylation. The researcher discovers that there are no N-linked glycosylated proteins on the cell surface and unusually high levels of glycosylated in the ER membrane. What is a reasonable hypothesis to explain this observation?

A. The cell is defective in synthesizing of carbohydrates B. The cell is defective in assembling carbohydrate trees C. The cell has a defective oligosaccharide transferase D. The cell has a defect in its protein sorting pathway E. The cell has a defect in its ER localization signal

Biology & Microbiology

Decapod crustaceans (shrimps, lobsters, and crabs) all lack  

A.  a carapace, a dorsal cephalothorax shield. B.  a ventral line of appendages, swimmerets. C.  a tail spine, telson. D.  chelicerae.

Biology & Microbiology

To best isolate mutant bacteria that are threonine auxotrophs from a larger population, threonine-rich media should be inoculated and any colonies that form are presumptive auxotrophic mutants.

Answer the following statement true (T) or false (F)

Biology & Microbiology

All living organisms are part of the natural world because __________.

Biology & Microbiology