Which part of the lac operon produces a regulatory protein that is trans-acting?

What will be an ideal response?


lacI

Biology & Microbiology

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You are asked to determine whether sulfur bacteria are active in a particular area of an estuary. What observations or tests can you perform to confirm this activity?

What will be an ideal response?

Biology & Microbiology

If a population has an allele frequency of 1.0, you would say that

A) the allele frequency is ideal. B) genetic variation of that allele is low. C) genetic variation of that allele is high. D) that allele is under selection.

Biology & Microbiology

Which of the following examples of successional processes illustrates how disturbance can lead to alternate stable states (climaxes) in the same habitat?

A) succession of carrion feeders in the African savanna B) replacement of pines by deciduous tree species in the Piedmont of North Carolina C) grazing-induced invasion of cheatgrass and its promotion of fire in western North America D) development of beech-maple forests on Lake Michigan sand dunes

Biology & Microbiology

There are 5 independently assorting genes named A, B, C, D and E. If you bred individuals with these genotypes: AABbCcddEE x AaBbCcDDEE, what would be the expected proportion of offspring that would have the following genotype: AABbccDdee?

a) 0 b) 1/16 c) 1/8 d) 1/32

Biology & Microbiology