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: 6948

#Unit 5. Developmental Biology

Which of the following genes is expressed at the posterior margin of each parasegment

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#Question id: 23115

#Unit 2. Cellular Organization

The assay which is used in DNA foot-printing to identify the nitrogenous base sequences

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#Question id: 1834

#Unit 4. Cell Communication and Cell Signaling

Lepromatous leprosy is characterized by:

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#Question id: 28406

#Unit 5. Developmental Biology

Noggin is a secreted protein that is able to accomplish two of the major functions of the organizer, such function involve__ 

a) It induces dorsal ectoderm to form neural tissue

b) It induces dorsal ectoderm to form epidermal tissue

c) It dorsalizes mesoderm cells that contribute to the ventral mesoderm

d) It dorsalizes mesoderm cells that contribute to the dorsal most mesodermal cell

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#Question id: 13034

#Unit 13. Methods in Biology

Which the following statements is/are true about the stacking gel?

i. The stacking gel solution contains acrylamide.

ii. It is on the top of the separating gel.

iii. It is used to dilute the protein sample before it enters the main separating gel.

iv. It is into this gel that the wells are formed and the proteins loaded.