Which of the following life history traits of mice is NOT an advantage for its use as a model
organism?
a. Reproductive rate.
b. Generation time.
c. Small size.
d. Maintenance in the laboratory.
e. Large size.
E
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The end of the retraction fiber touching the cell culture plate still contains the cell equivalent of super glue.
a. true b. false
A(n) (operon/codon/gene) is a specific sequence of nucleotides that codes for a protein or an RNA molecule
What will be an ideal response?
The human gene for a protein hormone has been isolated. Scientists want to introduce this gene into a bacterial host, modifying the bacteria so that it can be used to produce this hormone. After successfully introducing the gene on a plasmid, the bacteria produced the protein hormone, but the protein was defective, longer than normal, with intervening stretches of amino acids not found in the native protein. What is the most likely explanation?
A. The bacteria can't transcribe the human gene. B. Bacterial ribosomes make errors when transcribing human mRNAs. C. The gene that was introduced contained introns. D. Bacterial cells cannot translate mRNAs transcribed from human genes.
Structures covering the body and comprised of stratified squamous epithelium and dense connective tissue are known as
What will be an ideal response?