If the formation of the endoderm does not take place in an embryo, yet the embryo, for whatever reason, continues to develop, which of the following structures will NOT develop?
A) Skin
B) Nervous system
C) Heart
D) Kidneys
E) Stomach
E
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How does the RecA protein contribute to the increased expression of SOS genes?
A. RecA protein competes with LexA protein for binding to the operator sequences. B. RecA protein binds to LexA protein bound to the operator, directly lowering the affinity of LexA protein for DNA. C. RecA protein binds to free LexA protein, mediating the self-cleavage of the repressor. D. RecA protein binding to the promoter region recruits RNA polymerase.
If multiple fragments from a genome have been cloned into bacteria, how can a researcher identify the
bacteria that contains the particular sequence they are interested in?
a. The bacteria containing the gene of interest are antibiotic resistant and unable to digest Xgal. b. The DNA purified from individual colonies of bacteria is probed with a short, single stranded DNA fragment that is complementary to the gene of interest. c. The scientists have to sequence all of the DNA from all of the white bacterial colonies; fortunately computers let us automate this process. d. The scientists have to sequence all of the DNA from all of the blue bacterial colonies; fortunately computers let us automate this process. e. We have to isolate the DNA of interest before transforming it into the bacteria. That is the only way to know which bacteria have the DNA of interest.
Alcohol dehydrogenase converts alcohol into _____________________. Fill in the blank(s) with the appropriate word(s)
Inflammatory and degenerative conditions
What will be an ideal response?