The enzyme that catalyzes the initial processing of miRNAs in the nucleus is:

A. Drosha.
B. Dicer.
C. Argonaute.
D. RNase A.


A

Biology & Microbiology

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Rod cells differ from cone cells in that

a. rod cells respond to changes in light intensity, and cone cells detect very dim light. b. rod cells contain pigments which enable the perception of color, and cone cells respond to changes in light intensity. c. rod cells respond to changes in light intensity, and cone cells contain pigments which allow for the perception of color. d. rod cells are responsible for acute daytime vision, and cone cells detect very dim light. e. they are none of these.

Biology & Microbiology

These contain enzymes and are the main organelles of intracellular digestion

a. Golgi bodies b. ribosomes c. mitochondria d. lysosomes e. endoplasmic reticula

Biology & Microbiology

Which of the following animals does not use lungs to acquire oxygen?

A) whale B) frog C) bird D) butterfly

Biology & Microbiology

A genetic change in one species that selects for a subsequent change in a different species is

A. coevolution. B. genetic dispersion. C. gene dynamics. D. competitive exclusion. E. evolutionary dynamics.

Biology & Microbiology