What is meant by the term helix-turn-helix (HTH)?
What will be an ideal response?
A geometric conformation is formed by two adjacent alpha helices separated by a "turn" of several amino acids. Such motifs bind to the major grooves of DNA and interact with the DNA backbone.
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Which of the following is the least important characteristic that geneticists look for in a model organism?
A) ease of cultivation B) rapid reproduction C) small size D) small genome
Root hair development is under the control of two genes that code for transcription factors
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What is the process in which one activated receptor can give rise to thousands of
final products? a. signal transcription
b. signal transmission c. signal transduction d. signal termination e. signal amplification
Mycoplasmas are pleomorphic because they
A. have no cell walls. B. are low G + C content Gram-positive bacteria. C. exhibit snapping division. D. have sterols in their cytoplasmic membranes. E. produce endospores.