Most imprinted genes are silenced. What is one exception to this rule?

A. H19
B. Igf-2
C. UBE3A
D. SNRPN


B

Biology & Microbiology

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Skeletal muscle contraction is largely dependent on calcium ions that enter the cell from:

A. the extracellular space. B. the sarcoplasmic reticulum. C. the T tubule. D. the Z disc.

Biology & Microbiology

The virulence factor of Yersinia pestis that is a protease that destroys C3b and C5a is

A. Yops. B. pla. C. F1. D. protein A.

Biology & Microbiology

In a mutualistic relationship with a plant, the fungus receives

a. minerals. b. protection. c. sugar. d. water.

Biology & Microbiology

Nucleic acid is found 

A. only in animal cells. B. only in plant cells. C. in all living cells. D. only in carbohydrates.

Biology & Microbiology