A nucleotide is made of which of the following chemical components?
a. a nitrogenous base, an amino acid, and a pentose sugar
b. a nitrogenous base, an amino acid, and a phosphate group
c. a nitrogenous base, a phosphate group and a pentose sugar
d. a nitrogenous base, a fatty acid, and an amino acid
e. a series of nitrogenous bases, a nucleic acid backbone
Ans: c. a nitrogenous base, a phosphate group and a pentose sugar
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One strategy used by dissimilatory metal-reducing bacteria that enable their use of insoluble compounds as electron acceptors is to localize cytochromes in the outer membrane, rather than the plasma membrane to enable the direct transfer of electrons from cytochromes to the extracellular metal.
Answer the following statement true (T) or false (F)
Long terminal repeats (LTRs) are:
A. a class of transposable elements that replicate and transpose via DNA replication and repair. B. a class of transposable elements that uses RNA as an intermediate. C. a class of transposable elements that uses DNA as an intermediate. D. a class of transposable elements that uses protein as an intermediate. E. a class of transposable elements that uses ribosomes as an intermediate.
A male who inherits an extra X chromosome will have
A. Klinefelter syndrome. B. Turner syndrome. C. Down syndrome. D. Polyploid syndrome. E. Edward syndrome.
Which fungal lineage is the oldest?
a. Deuteromycetes b. Chytrids c. Glomeromycetes d. Zygomycetes e. Ascomycetes