Activation of resting B-cells by T-helper cells depends directly upon costimulatory interaction between:

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#Question id: 11482

#Unit 7. System Physiology – Animal

The umami receptor in the sense of taste detects ________.

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#Question id: 33310

#Unit 1. Molecules and their Interaction Relevant to Biology

Identify the plot shown

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#Question id: 15271

#Unit 13. Methods in Biology

During RNA extraction, the homogenate is first treated with

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#Question id: 15837

#Unit 8. Inheritance Biology

You are interested in a new type of autosomal dominant mutation that gives purple eyes in Drosophila. You have a true-breeding purple-eyed line carrying a mutation that you call pr-1. You have isolated a second purple-eyed mutation that you call pr-2, which you have established in a true-breeding line that also carries a recessive marker st, which gives stubby legs. You cross a fly from the pr-1 line to a fly from the st, pr-2 line producing F1 females which you then cross to males from a true breeding st line (normal eyes). From this cross, 1000 progeny flies can be categorized into four different phenotypic classes:

                      

What is the relative order of st, pr-1 and pr-2?

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#Question id: 15291

#Unit 5. Developmental Biology

Cell to cell communication is important in development of an organism. The ability of cells to respond to a specific inductive signal is called