To make a transgenic Huntington Disease mouse, a copy of the mutant human HD gene was cloned into a vector, and the next step was to _____
1.transfer the vector directly into the foster mother mouse
2.microinject the vector into the nucleus of a fertilized mouse egg
3.transform bacteria using the engineered plasmid
4.insert the sequence into the genome of a virus and infect a mouse with the virus
2
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Biologists usually classify things according to their:
a. appearance b. habitat c. when they lived
Which of the following statements is a correct distinction between autotrophs and heterotrophs?
A) Cellular respiration is unique to heterotrophs. B) Only heterotrophs have mitochondria. C) Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic. D) Only heterotrophs require oxygen.
The avian erythroblastosis virus contains an oncogene called erbB that encodes ___________.
a) an underexpressed nuclear protein b) an elongated auxillary protein of the cytoskeleton c) an altered insulin receptor that binds insulin with lower affinity d) an altered transcription factor that turns on hemoglobin synthesis e) an altered EGF receptor that is missing part of the extracellular domain that binds to the growth factor
In eukaryotes a so-called cap consisting of ________ is attached to the 5' end of the molecule during posttranscriptional modification of hnRNA to produce functional mRNA.
Fill in the blank(s) with the appropriate word(s).