Helix can form in polypeptides consisting of either L- or D-amino acids but never exist to contain both types.

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#Id: 5628

#Unit 7. System Physiology – Animal

Sensory receptors show adaptation, when a constant stimulus is applied for a period of time. Pattern of adaptation are phasic (adapt rapidly to the stimulus)& tonic(adapt slowly to the stimulus)

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#Id: 8353

#Unit 2. Cellular Organization

A second NPF is a large protein complex called WAVE

and requires small GTP-binding protein Rac1.

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#Id: 3216

#Unit 4. Cell Communication and Cell Signaling

Carcinogens

1. Environmental DNA-damaging agents

2.Prevent DNA damage from being repaired with high fidelity

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#Id: 5493

#Unit 10. Ecological Principles

If survival of juveniles and adult is poor - Selection favors a single act of reproduction

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#Id: 9634

#Unit 4. Cell Communication and Cell Signaling

The GAP for RAS (called a RAS-GAP) works by inserting one of its arginine side chains into the Ras active site, thus stabilizing an intermediate in the

hydrolysis reaction.