Continuous cell cultures are developed from (embryonic/haploid/neoplastic) cells.
Fill in the blank(s) with the appropriate word(s).
neoplastic
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Which of the following statements is TRUE of restriction enzymes?
A. They are not naturally produced by bacteria, but are bioengineered by them. B. They protect bacterial cells from invasion by foreign DNA. C. There are less than 10 restriction enzymes known. D. They cleave the DNA backbone at only one location. E. They cleave DNA only at sites of adjacent thymine bases.
In a lysosomal storage disease, the hydrolases of lysosomes are released from the cells, rather than being isolated into vesicles. What is one possible mechanism for this result?
A) A proton gradient within vesicles was not generated. B) The ER was unable to produce lysosomal vesicles. C) Lysosomal enzymes were not phosphorylated in the rER. D) There is a lack of mannose-6-phosphatase activity. E) There is a mutation in all hydrolase genes that results in loss of the signal peptide.
________ are a group of cytokines produced by some eukaryotic cells in response to a viral infection.
Fill in the blank(s) with the appropriate word(s).
A recessive allele on the X chromosome causes color deficiency. A noncolor-deficient woman (whose father is color deficient) marries a color-deficient man. If they have a son, what is the chance that he will be color deficient?
A) 25% B) 0% C) 100% D) 75% E) 50%