________ produces the second messenger diacylglycerol (DAG).
Fill in the blank(s) with the appropriate word(s).
Phospholipase C
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Which of the following observations supports the endosymbiotic theory for mitochondria? a. Mitochondria divide independently of nuclear division
b. All of the choices. c. Mitochondria have their own DNA. d. Membranes within mitochondria resemble plasma membranes of bacteria.
The tryptophan codons of the attenuator sequence help speed up transcription of downstream trp genes at high concentrations of tryptophan
Indicate whether the statement is true or false
When gene duplication occurs to its ultimate extent by doubling all genes in a genome, what has occurred?
A) pseudogene creation B) creation of a gene cluster C) creation of a polyploid D) creation of a diploid
In the textbook, the stomach was given as an example of an organ. Which of the following is a valid description of the work of one of its tissues?
A) Its epithelial tissue secretes substances that help with digestion. B) Its muscle tissue forces secretions out of glands and into the stomach. C) Its connective tissue helps drain the stomach contents. D) Its nervous tissue communicates directly with the intestines to coordinate digestion.