About 25 of the 92 natural elements are known to be essential to life. Which 4 of these 25 elements make up approximately 96% of living matter?

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#Question id: 32390

#Unit 2. Cellular Organization

What happens when Ca²⁺ binds to troponin C?

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#Question id: 5843

#Unit 8. Inheritance Biology

 In homologous recombination in E. coli, the protein that assembles into long, helical filaments that coat a region of DNA is:

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#Question id: 28919

#Unit 4. Cell Communication and Cell Signaling

Given some statements about Hedgehog processing and secretion;

a) autoproteolytic activity that cleaves off the C-terminus to reveal a signal sequence that marks the protein for secretion 

b) autoproteolytic activity that cleaves off the N-terminus to reveal a signal sequence that marks the protein for secretion 

c) Secretion requires the addition of cholesterol and palmitic acid

d) Secretion requires the  modification of Hh by Glycosylation

Which of the following is correct prediction about processing and secretion of Hh?

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#Question id: 27947

#Unit 1. Molecules and their Interaction Relevant to Biology

For each molecule of glucose degraded to pyruvate, two molecules of ATP are generated from ADP and Pi, and two molecules of NADH are produced by the reduction of NAD+. The hydrogen acceptor in this reaction is NAD+  this NAD+ bound to a

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#Question id: 5782

#Unit 8. Inheritance Biology

A ____ mutation is intentionally caused.