Which of the following statements about miRNAs is false?

(a) One miRNA can regulate the expression of many genes.
(b) miRNAs are transcribed in the nucleus from genomic DNA.
(c) miRNAs are produced from rRNAs.
(d) miRNAs are made by RNA polymerase.


(c)

Biology & Microbiology

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A reducing medium is used to culture ________ organisms.

A. pathogenic B. aerobic C. anaerobic D. fastidious

Biology & Microbiology

Cell walls of most Archaea and bacteria contain peptidoglycan.

Answer the following statement true (T) or false (F)

Biology & Microbiology

After DNA unwinds and becomes single-stranded in a PCR reaction, the temperature is lowered to allow the ____ to

hybridize with the DNA template.

a. vectors b. primers c. tracers d. restriction enzymes e. DNA ligase

Biology & Microbiology

Which of the following bacterial enzymes causes the release of lysosomal contents into the cytoplasm of the phagocytic cell, leading to the death of the cell?

A. Protein H B. Leukocidin C. M protein D. IgA protease

Biology & Microbiology