Super secondary structures that contain recognizable combinations of α-helices, β-strands and loops (e.g. the Greek Key) are called ________.

#Question id: 4949

#Unit 11. Evolution and Behavior

What probably accounts for the switch to DNA-based genetic systems during the evolution of life on Earth?

#Question id: 12461

#Unit 10. Ecological Principles

A diagram of a food web, for the following questions. (Arrows represent energy flow and letters represent species.)

If this were a marine food web, the smallest organism might be

#Question id: 5690

#Unit 8. Inheritance Biology

Species I is diploid (2n =4) with chromosomes AABB; related species II is diploid (2n = 6) with chromosomes MMNNOO .Which of the following chromosome  in allotriploid individuals?

#Question id: 887

#Unit 1. Molecules and their Interaction Relevant to Biology

Polypeptides fold rapidly by a stepwise process, how does the polypeptide chain arrive at its native conformation?

#Question id: 466

#Unit 1. Molecules and their Interaction Relevant to Biology

When a reduction half-reaction is ________ (negative, positive), electrons flow to the more readily reduced substance which is ________ (negative, positive) in value.