A base change resulting in a codon specifying an amino acid which is different than in the wild-type polypeptide

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#Question id: 2321

#XL - T Zoology

The endosymbiont theory proposes that chloroplasts and mitochondria evolved from ________ and were engulfed by larger ________.

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#Question id: 3925

#XL - Q Biochemistry

Constitutive genes

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#Question id: 1114

#XL - Q Biochemistry

Sutherland discovered that the signaling molecule epinephrine is responsible for which of the following events?

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#Question id: 11647

#XL - T Zoology

After menopause, hormone replacement therapy with estrogen-like compounds is effective in preventing the progression of osteoporosis. What is the mechanism of their protective effect?

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#Question id: 15609

#XL - S Microbiology

Most bacteria, some protozoans  and even archaea use poly-β-hydroxybutyrate, a polymerized form of β-PHB, as