Benedict's solution is commonly used to test for the presence of
a. proteins.
b. certain carbohydrates.
c. nucleic acids.
d. lipids.
b
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Deduce why viruses are excluded from the ribosomal RNA-based tree of life
A) Some viruses contain multiple strands of RNA. B) Their genetic elements cannot be sequenced. C) They can infect other organisms, which complicates the genetic comparisons. D) They lack ribosomal RNA.
Which type of microscope creates an image by capturing electrons ejected from the specimen?
a. LM b. TEM c. SEM
Which of the following phrases reflects an effective treatment of biofilms?
A. Interrupt quorum-sensing pathways, preventing signaling between cells B. Pre-treat with newly-discovered antimicrobials before exposure to established drugs C. Add DNase to the antibiotics to disrupt extracellular debris D. All of the above have been shown to enhance biofilm elimination.
One biological example of a positive feedback system is
A) blood pH levels. B) water balance. C) temperature regulation. D) mammalian birth.