The normal sex chromosomal combination for a human female is
A. XYY.
B. XY.
C. YY.
D. XX.
E. XXX.
D. XX.
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The majority of bacterial DNA is negatively super coiled
Indicate whether the statement is true or false
Cyanobacteria are so named because many species have a blue-green appearance caused by the photosynthetic pigment phycocyanin.
Answer the following statement true (T) or false (F)
In addition to being a group of gram-negative bacteria considered normal flora of the gastroin-testinal tract of humans and animals, which one of the following also contains agents of impor-tant diseases such as gastroenteritis and enteric fevers, urinary tract infections, and bacterial pneumonia?
a. Neisseriaceae b. Micrococcaceae c. Enterococcus d. Enterobacteriaceae
The active site of DNA polymerase is similar
a. in archaea and bacteria only b. in archaea, bacteria, and eukaryotes c. in archaea and eukaryotes only d. in none of these groups e. in bacteria and eukaryotes only