If an optic vesicle from a Xenopus laevis embryo is placed underneath head ectoderm in a different part of the head from where the frog’s optic vesicle normally occurs then what happens?

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#Question id: 12372

#Unit 10. Ecological Principles

In a particular case of secondary succession, three species of wild grass all invaded a field. By the second season, a  single species dominated the field. A possible factor in this secondary succession was

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#Question id: 15844

#Unit 8. Inheritance Biology

You have isolated two temperature-sensitive mutations in phage l that you suspect may be in the same gene. These phage mutants are called ts-1 and ts-2. Each mutant will form plaques at 35˚C but not at 42˚C. You cross ts^-1 to ts^-2 phage by coinfecting E. coli at the permissive temperature of 35˚C. When the resulting phage lysate is plated at 35˚C you count 10,000 plaques per ml of phage lysate, but when the same phage lysate is plated at 42˚C, there are only 80 plaques per ml.  

If the total size of the phage is 5 x 10⁴ bp and the total genetic map length of the phage is 100 m.u., about how far apart are the mutations in base pairs?

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#Question id: 32328

#Unit 1. Molecules and their Interaction Relevant to Biology

G-1-phosphate is converted into fructose 6-phosphate in two successive reactions. The Keq for this coupled reaction will be

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#Question id: 28778

#Unit 2. Cellular Organization

In the nucleation phase the  G-actin molecules binds to form a trimer, which makes__

a) the entire group relatively weakly to each other

b) the entire group more stable

c) the group acts as a nucleus for polymerization

d) the clump act as a secondary structure

Which of the following statements is correct?

TLS Online TPP Program

#Question id: 27984

#Unit 1. Molecules and their Interaction Relevant to Biology

Correct order of Electron transfer through Complex IV is