Which of the following organisms best describes a catalase-negative, gram-positive coccus that is hemolytic on sheep blood agar, and bacitracin positive?
a. Streptococcus pyogenes
b. Streptococcus pneumoniae
c. Staphylococcus epidermidis
d. Micrococcaceae spp.
A
Micrococcaceae spp. and S. epidermidis are catalase-positive, and S. pneumoniae is hemolytic.
You might also like to view...
The RNase known as ________ helps cut eukaryotic double-stranded RNAs to form the miRNA species.
Fill in the blank(s) with the appropriate word(s).
Most of the effort involved in recombinant DNA technology involves
A) identifying and separating cells that contain the gene of interest. B) finding a restriction enzyme to cut DNA from a donor cell. C) identifying a cloning vector that can hold a gene. D) finding uses for recombined DNA.
What is the iron hypothesis and why has it not been supported?
What will be an ideal response?
Which sentence describes the width of a DNA double helix?
a. The width is greater where purines are present than where pyrimidines are present. b. The width is narrower where adenine is present than where cytosine is present. c. The width is constant. d. The width varies randomly.