Defend why codon usage must be considered when cloning a gene into another organism
What will be an ideal response?
Answer: The primary concern for codon usage is that one organism might natively make a large quantity of a particular amino acid, so proteins rich in this particular amino acid can maintain a high level of translation, yet the cloning host does not make high levels of the amino acid. This results in unexpectedly low levels of the engineered gene product.
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Xylem is able to extract water from soil because it is in direct contact with the soil
A. true B. false
Which of the following are part of the inflammatory response? (Check all that apply.)
_____ Antibodies and interferons are produced against the antigens. _____ Histamine and other chemicals are released, which produce redness, warmth, and edema. _____ Invading agent causes the release of pyrogens, which produce a fever. _____ Neutrophils and macrophages attack the invading microbes and contribute to the pus.
Where does normal fertilization of an egg by a sperm in a human female occur?
A. at the ovary upon ovulation B. in the uterus after the egg has implanted C. in the uterus before the egg has implanted D. near the cervix before the egg leaves the female E. in the Fallopian tube
Four of the five structures listed below can be used to
describe fungal reproductive structures. Select the exception. a. asci b. rhizoids c. zygospores d. conidia e. spores