Which of the following mutations is dominant over wild-type lacI+ in a partial diploid experimental cell?

A) lacA-
B) lacO-
C) lacI-
D) lacIS
E) C and Donly


D

Biology & Microbiology

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Adenylyl cyclase is to cAMP as ________ is to IP3.

A. protein kinase A B. protein kinase C C. calmodulin D. Raf1 E. phospholipase C

Biology & Microbiology

A tRNA with the anticodon sequence 5? IUA 3? will not normally exist because

A) 5? UAA 3? is a stop codon. B) I is not a base present in tRNAs. C) it will recognize codons for different amino acids. D) 5? UAU 3? and 5? UAC 3? both specify tyrosine.

Biology & Microbiology

When a population has inhabited an area for a long time and the population size has stabilized, then

A) the environmental resistance declines. B) density-independent factors are involved. C) the carrying capacity of the area has been reached. D) predation decreases. E) density dependence is clearly not involved in the population growth.

Biology & Microbiology

The biologically available carbon that is produced within large, lentic rivers and lakes is called ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology