Which structure is associated with the outer ear?
A. tympanic membrane
B. round ear
C. cochlea
D. semicircular canals
E. auditory canal
Answer: E
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Which of the following is not a characteristic of the transcriptional ground state in higher eukaryotes?
A. Gene promoters are essentially inactive in the absence of regulatory proteins. B. RNA polymerase initiates efficient transcription in the absence of repressors. C. Access to promoters is restricted by the structure of chromatin. D. Virtually every gene requires activation.
In normal cells, cell adhesion molecules are partially responsible for the cell's ability to ____
a. migrate to new locations in the body b. recognize other cells as "self" c. exocytosis d. both migrate to new locations in the body and recognize other cells as “self” e. recognize linkages between cells in muscle and bone
The genes that determine the development of limbs in lizards as opposed to snakes are called hox
genes.
Indicate whether the statement is true or false.In the phospholipase C signal transduction pathway, which two second messengers are produced?
a. IP3 and DAG b. PIP2 and IP3 c. cAMP and IP3 d. phospholipase C and protein kinase A e. phospholipase C and G protein