Which enzyme adds new nucleotides to the end of a growing strand?

A. helicase
B. polymerase
C. gyrase
D. ligase
E. endonuclease


Answer: B

Biology & Microbiology

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External gills that are later replaced by paired lungs are found in:

a. fish b. amphibian larvae c. frogs d. reptiles e. mammals

Biology & Microbiology

An ECG measures ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Constriction where sister chromatids of a chromosome are held together.

What will be an ideal response?

Biology & Microbiology

If you isolate a pancreatic beta cell and put it in the proper growth conditions, it will divide by mitosis and produce new beta cells, but it will not produce pancreatic alpha cells or pancreatic cells that release digestive enzymes.  The pancreatic beta cell is

A. unipotent. B. pluripotent. C. impotent. D. totipotent. E. multipotent.

Biology & Microbiology