If the apical ectodermal ridge is surgically removed from an embryo, it will lose ________.

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#Question id: 1840

#Unit 4. Cell Communication and Cell Signaling

What does the term variolation refer to?

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#Question id: 387

#Unit 1. Molecules and their Interaction Relevant to Biology

For a weak acid with a pKa of 6.0, What would be the ratio of acid to salt at pH 5.

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#Question id: 14765

#Unit 2. Cellular Organization

Following statements are regarding to the formins which involve in filament assembly.

A. All formin family members have two adjacent domains in common, the so called FH1 and FH2 domains (formin-homology domains 1 and 2).

B. Two FH2 domains from two individual formin monomers associate to form a doughnut-shaped complex can form a dimer and nucleate filament assembly.

C. The FH1 domain of formin is rich in proline residues, which serve as sites for the binding of several profilin molecules.

D. The FH2 domain behaves as a landing site for profilin–ATP–G-actin to increase the local concentration of these complexes.

E. Formins are activated by membrane bound Rho-GTP, a Ras-related small GTPase.

Which of the following combination is correct?

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#Question id: 15902

#Unit 12. Applied Biology

The pair of hormones required for a callus to differentiate are____

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#Question id: 1869

#Unit 4. Cell Communication and Cell Signaling

Which of the following HIV antigens provides a potential target for neutralizing antibody?