Which two enzymes do DNA researchers need to cut and paste DNA from different sources?

a. restriction enzymes and DNA ligase
b. restriction enzymes and DNA polymerase
c. DNA ligase and DNA polymerase
d. restriction enzymes and helicase


e. helicases and DNA polymerase


ANSWER: a

Biology & Microbiology

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All unicellular organisms belong to the same domain of life

Indicate whether the statement is true or false.

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What is the key concept addressed by the question?

What will be an ideal response?

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You find an Arabidopsis plant in your greenhouse that lacks stamens and carpels, and has two rows of petals and sepals. What happened to cause this abnormal flower development?

A. a mutation in gene C B. an overexpression of gene B C. a mutation in gene A D. a mutation in gene C and overexpression of gene E E. mutations in gene C and gene A

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Which of the following scientists suggested

that RNA may have been the first informational molecule?

a. Crick and Orgel b. Crick and Watson c. Crick and Chargaff d. Watson and Orgel e. Watson and Chargaff

Biology & Microbiology