Four of the five enzymes listed below are used in genetic engineering. Select the exception
a. ligase
b. reverse transcriptase
c. restriction
d. replicase
e. DNA polymerase
D
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This chemical is produced at the terminus of the axon, is typically a protein, and diffuses across the synaptic cleft to cause the neural message to be continued in the receiving cell
a. ATP b. ACH c. ACTH d. TSH e. neurotransmitter
The smallpox vaccine uses the ________ virus.
A. smallpox B. variola C. human herpesvirus 6 D. vaccinia E. herpes simplex
Which of the following is not true of cellulose?
A. It is the most abundant organic compound on Earth. b. it differs from starch because of the configuration of glucose and the geometry of the glycosidic linkage. c. It may be hydrogen-bonded to neighboring cellulose molecules to form microfibrils. d. Few organisms have enzymes that hydrolyze this glycosidic linkages. e. Its monomers are glucose with nitrogen containing appendages
Which phylum do roundworms belong to?
A. porifera B. arthropoda C. nematoda D. cnidaria