Which best describes the structure of a nucleosome core particle?

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#Question id: 15443

#Unit 4. Cell Communication and Cell Signaling

The caspases have which amino acid residues in their catalytic site and what is the cleavage site of these effector proteases;

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#Question id: 2668

#Unit 2. Cellular Organization

The toxic shock syndrome toxin is produced by some Salmonella species when there is not sufficient iron present. When iron is present, it prevents transcription of the TSS-toxin gene. Iron therefore serves as __________.

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#Question id: 3419

#Unit 11. Evolution and Behavior

Which of the following is correct statement?

A. Co-evolution occurs when two or more species reciprocally affect each other's evolution through the process of natural selection.

B. Co-evolution is likely to happen when different species have close ecological interactions with one another.

C. Plant and insect is classical example of co-evolution to maintain ecological interaction

D. Co-evolution is likely to evolution of similar trait in different species

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#Question id: 12036

#Unit 7. System Physiology – Animal

A fasting animal whose energy needs exceed those provided in its diet will draw on its stored resources in which order?

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#Question id: 12473

#Unit 10. Ecological Principles

You are observing a population of lizards when you notice that the number of adults has increased and is higher than previously observed. One explanation for such an observation would include