A 7-year-old boy is evaluated for short stature. His average circulating growth hormone level is within the normal range for his age, but levels of IGF-I are reduced. His growth failure is most likely due to a defect in:

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#Question id: 31085

#Unit 4. Cell Communication and Cell Signaling

IP3/DAG signaling is terminated when: 

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#Question id: 5787

#Unit 8. Inheritance Biology

A spontaneous mutation usually originates as an error in

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#Question id: 490

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one of the following statements about gluconeogenesis is false?

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#Question id: 17267

#Unit 8. Inheritance Biology

In humans, albinism (unpigmented skin, hair, and eyes) is due to an enzymatic deficiency, and it is an autosomal recessive trait. Suppose that in a small country of one million people (“Generation 1”), there are 500 aa albinos and 9000 Aa heterozygous carriers. Estimate q, the frequency of allele a, in Generation 1. Show your calculations. 

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#Question id: 3284

#Unit 11. Evolution and Behavior

The fitness of three genotype are A1A1 < A1A2 = A2A2) Which of the following observation correct?