One feature of "engineered" plasmids that is helpful in the isolation and analysis of cloned DNA is:
a. they can only handle DNA fragments of up to 10 kb.
b. that they are an integral part of all eukaryotic cells.
c. they contain no genetic material of their own so that the cloned fragment is truly isolated.
d. the presence of genes that allow transformed cells to survive on different media.
e. the base sequence of one strand reads the same asits complement
D
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Which component of the complex described enters the exit tunnel in the large subunit of the ribosome?
A) tRNA with attached lysine (#1) B) tRNA with polypeptide (#2) C) tRNA that no longer has attached amino acid D) newly formed polypeptide E) initiation and elongation factors
Which receptor is associated with the perception of pain?
A. thermoreceptor B. chemoreceptor C. nociceptor D. photoreceptor
Which of the following represents a density-independent cause for the extinction of wooly mammoths?
a. human hunting b. reduction of habitat c. climate change d. disease
Visual information is processed in the
A) frontal lobes. B) parietal lobes. C) temporal lobes. D) hippocampus. E) occipital lobes.