When a DNA sequence is permanently rendered inaccessible to transcription via methylation and

chromatin modifications, we call this



a. silencing.
b. imprinting.
c. a Barr body.
d. inactivation.
e. quiescence.


B

Biology & Microbiology

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Eukaryotic cells contain membrane bound _____________________ in their cytoplasm

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

Biology & Microbiology

Four of the following five events shuffles existing alleles into different combinations in sexually reproducing

organisms. Which one is the exception? a. changes in chromosome number b. mutation c. independent assortment of chromosomes d. crossing over e. fertilization

Biology & Microbiology

Which statement about microsporidia is FALSE?

a. They are parasitic. b. Some divide by binary fission. c. They are classified with the zygomycetes. d. They have mitochondria and Golgi complexes

e. They have a feeding stage and a reproductive stage.

Biology & Microbiology

The rapid appearance of animals in the fossil record occurred during the Ediacaran radiation

____________________ Indicate whether the statement is true or false.

Biology & Microbiology