During early sea urchin development, which embryonic cells have similar organizer activity to that of amphibian Spemann organizer?

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#Question id: 2747

#Unit 2. Cellular Organization

How many contacts are observed between the DNA and the histone core protein?

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#Question id: 7254

#Unit 5. Developmental Biology

Following statements regarding to the micromeres specification and regulatory input  in sea urchin embryo. Which of the following statement is correct?

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#Question id: 28733

#Unit 2. Cellular Organization

Vesicles coated with GGA proteins and clathrin bind to proteins containing___

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#Question id: 14502

#Unit 13. Methods in Biology

The chances of a person being alive who is now 35 years old, till he is 75 are 8 : 6 and of another person being alive now 40 years old till he is 80 are 4 : 5. The probability that at least one of these persons would die before completing 40 years hence is

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#Question id: 32517

#Unit 1. Molecules and their Interaction Relevant to Biology

A typical mitochondrion can be thought of as a cylinder 1 µm in diameter and 2 µm in length. If the pH in the matrix is 7.8, how many protons are contained in the mitochondrial matrix?