Consider a species with a diploid (2n) number of 16 chromosomes. How many chromosomes would be found in a trisomic body cell?

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#Question id: 678

#Unit 1. Molecules and their Interaction Relevant to Biology

Which is not true about β-sheets?

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#Question id: 12095

#Unit 10. Ecological Principles

It is now thought that the atmosphere of the primitive Earth was composed largely of carbon dioxide, nitrogen, and water vapor. The composition of certain iron-containing minerals suggests that the carbon dioxide began to be replaced by oxygen about 2 billion years ago.   Which of the following is the best explanation for the change in atmospheric composition?

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#Question id: 4391

#Unit 3. Fundamental Processes

What family of proteins plays an essential role in the repression of genes that help to direct the formation of specific tissues and organs in a developing embryo?

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#Question id: 21808

#Unit 12. Applied Biology

Which one of the following sensors measures electrical conductance?

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#Question id: 544

#Unit 1. Molecules and their Interaction Relevant to Biology

One of the enzymes involved in glycolysis, aldolase, requires Zn2+ for catalysis. Under conditions of zinc deficiency, when the enzyme may lack zinc, it would be referred to as the: