Suppose a segment of DNA contains five restriction sites for a particular restriction enzyme. How many fragments of DNA will remain after the enzyme is used to cut the DNA?

A.) 4
B.) 5
C.) 6
D.) 10


Ans: C.) 6

Biology & Microbiology

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The first oncogene to be discovered:

A. is a gene that contributes to uncontrolled cell division or cancer. B. was first discovered in a Rous sarcoma virus that causes cancer. C. is a protein kinase that acts as a cell division trigger. D. has a less-active normal counterpart called a proto-oncogene. E. All of these choices are correct.

Biology & Microbiology

Heat treatment is an effective method for sterilization or disinfection of all materials

Indicate whether this statement is true or false.

Biology & Microbiology

Which of the following is not a bone? 

A. malleus B. incus C. stapes D. tympanum

Biology & Microbiology

Cnidarians have two basic body forms, medusae and ________.

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

Biology & Microbiology