Tyrosine contains a phenolic R-group and has pK1, pk2, pkR values of 2.20, 9.11, and 10.07 At which pH will all the tyrosine be in their fully protonated form?

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#Question id: 6986

#Unit 5. Developmental Biology

The use of segments as a developmental strategy in vertebrates is evident in:

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#Question id: 6987

#Unit 5. Developmental Biology

Which of the following statements about axon-guidance is TRUE?

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#Question id: 6988

#Unit 5. Developmental Biology

Many cells in the body divide only rarely, if at all; neurons, red blood cells, and keratinocytes are extreme examples. In which portion of the cell cycle would such cells be considered to be?

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#Question id: 6989

#Unit 5. Developmental Biology

Adult human bone:

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#Question id: 6990

#Unit 5. Developmental Biology

Insects such as Drosophila undergo three molts before becoming a pupa and undergoing metamorphosis. Molting, which is also called 'ecdysis', is controlled by what hormone?

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#Question id: 6991

#Unit 5. Developmental Biology

Metamorphosis of amphibians is triggered by environmental cues that act on the: