In one experiment, mice were genetically engineered to overexpress a particular set of miRNAs. These animals developed lymphomas. The genes encoding these miRNAs were acting as _________.

a) tumor suppressors
b) sex-linked dominant alleles
c) holandric genes
d) oncogenes


Ans: d) oncogenes

Biology & Microbiology

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If extinction is a natural process that occurs on an ongoing basis, how do extinctions occurring now differ from those of any other mass extinction periods?

What will be an ideal response?

Biology & Microbiology

In Jacob and Monad’s analysis of mutant E. coli strains in their study of the lac operon, the absence of the ?-

galactosidase enzyme, but presence of the lactose permease and galactosidase transacetylase enzymes, indicated that the mutation occurred in the _____ of the lac operon. a. regulatory region b. lacZ gene c. lacA gene d. lacY gene e. heterochromatin

Biology & Microbiology

A plant grows taller through ________, which involves cell division in the ________

A) primary growth... vascular cambium B) secondary growth... vascular cambium C) primary growth... apical meristem D) secondary growth... cork cambium

Biology & Microbiology

The amphibian kidney is identical to that of

A. insects. B. marine fish. C. freshwater fish. D. birds. E. humans.

Biology & Microbiology