In the presence of a large excess of _______ the disulfides (cystines) are fully converted into sulfhydryls (cysteines).

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#Question id: 9608

#Unit 9. Diversity of Life Forms

Darwin analogized the effects of evolution as the above-ground portion of a many-branched tree, with extant species being the tips of the twigs. The common ancestor of two species is most analogous to which anatomical tree part?

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#Question id: 536

#Unit 1. Molecules and their Interaction Relevant to Biology

Glucose 6-phosphate allosterically inhibits

A) hexokinase I.

B) glucokinase.

C) hexokinase II.

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#Question id: 5768

#Unit 8. Inheritance Biology

Exposure to gamma radiation leads to severe damage to DNA.  The bacterium Deinococcus radiodurans is able to survive exposure to levels of gamma radiation that would kill any other known organism.  This organism is able to survive because

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#Question id: 12182

#Unit 2. Cellular Organization

The cell cycle is controlled by protein kinases that comprise a catalytic subunit and a regulatory subunit. Which of the following statement is correct regarding to these subunits?

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#Question id: 132

#Unit 1. Molecules and their Interaction Relevant to Biology

Proline is distinct among the 20 commonly found amino acids because