If the copy number of a proto-oncogene is increased by gene duplication then the proto-oncogene has undergone
A. a missense mutation.
B. gene amplification.
C. a chromosomal translocation.
D. retroviral insertion.
E. a nonsense mutation.
B. gene amplification.
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A polysome is ____
a. the combination of a large and a small ribosomal subunit b. the complex where mRNA splicing occurs c. the promoter assembly at the site of transcription initiation d. an mRNA transcript to which multiple ribosomes are attached e. the complex that adds a poly(A) tail onto an mRNA
What is a requirement for glycolysis to proceed?
a. Glucose must enter the mitochondria. b. There must be an input of energy from ATP. c. Oxygen must be available. d. Heat must be supplied. e. Carbon dioxide must be available.
HIV
A. is a retrovirus. B. infects most mammals. C. can be killed with antibiotics. D. causes liver cancer. E. can be transmitted through the skin.
Which of the following is NOT associated with an electron microscope?
A) an electron beam B) magnetic fields C) a prism D) a fluorescent screen E) a vacuum