Which nucleotide replaces thymine in a nontemplate strand of mRNA?

a. Uracil
b. RNA polymerase
c. Guanine
d. Adenine


a. Uracil

All RNA strands—including mRNA—have the nucleotide uracil instead of thymine.

Biology & Microbiology

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What metabolism would be favored when there is a lack of electron acceptors?

A) anaerobic fermentation B) anoxygenic photosynthesis C) anoxic ammonia oxidation D) acetogenesis

Biology & Microbiology

Which of the following structures distinguishes plant cells from animal cells?

A. chloroplast B. nucleus C. plasma membrane D. golgi apparatus E. mitochondria

Biology & Microbiology

A Basidiomycete mycelium that is dikaryotic ________

a. is diploid b. has double-nucleated cells on the gills of the basidium c. has diploid spores d. has pairs of cells that have not yet fused at branches of the mycelium

Biology & Microbiology

Which statement is true?

a. Breathing rate and depth are completely under voluntary control. b. A person can commit suicide by holding his or her breath. c. The contraction of the diaphragm and muscle of the rib cage are under the control of areas of the brain. d. There are chemoreceptors in the brain that monitor carbon dioxide content in the blood and control breathing. e. The contraction of the diaphragm and muscle of the rib cage are under the control of areas of the brain, and there are chemo-receptors in the brain that monitor carbon dioxide content in the blood and control breathing.

Biology & Microbiology