A bacterium's pH optimum reflects the optimal pH of its intracellular environment
Indicate whether the statement is true or false.
Answer: FALSE
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Scientists have found that extracellular matrix components may induce specific gene expression in embryonic tissues such as the liver and testes. For this to happen there must be direct communication between the extracellular matrix
and the developing cells. Which kind of transmembrane protein would most likely be involved in this kind of induction? A) integrins B) collagens C) actins D) fibronectins
Resident staphylococci in the ________ seldom cause disease
A) eyes B) upper respiratory tract C) lungs D) kidneys
The development of organisms is based on
a. which genes are active in a given cell. b. when the genes function. c. what gene products appear. d. the amount of cellular products generated. e. all of these.
Type 1 fucosidosis is a rare human disease. Patients cannot hydrolyze the disaccharide fucose, and as a result have severe neurological decline and die by age 6. The disease is due to a defect in the gene that encodes the lysosomal enzyme that breaks down fucose (?-1-fucosidase), and is inherited in an autosomal recessive manner. Jane and John have a child who has Type 1 fucosidosis. What is the probability that their next two children will not have the disease?
A. 1/8 B. None (all of their children will have the disease) C. 3/4 D. 1/2 E. 9/16