The protein Sonic Hedgehog (SHH) plays a role in specifying the identity of digits (such as fingers and toes) in mammals. Several digits arise directly from cells that both express and respond to secreted SHH. What type of signaling would this be considered?

A. Autocrine
B. Direct contact
C. Synaptic
D. Paracrine
E. Endocrine


Answer: A

Biology & Microbiology

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Answer the following statement true (T) or false (F)

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Consider the events that describe the progress of a protein that will be secreted from the cell.

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What is the function of the E. coli proteins MreB, PBP2, and RodA?

What will be an ideal response?

Biology & Microbiology