After completing the nucleotide sequence of a microbial genome, computer translation of DNA sequence allows enzymes to be identified based on a short pattern of amino acid sequence called a contig that corresponds to the active site of the enzyme.
Answer the following statement true (T) or false (F)
False
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Why have scientists been unable to grow the majority of bacteria and archaea in pure culture in a laboratory setting?
A. Most microorganisms reside in extreme environments that are toxic to human life, so samples cannot be collected for cultivation of the microbial inhabitants in the laboratory. B. Many species have metabolic requirements that are difficult to fulfill in the laboratory. C. DNA sequencing technology was not sufficiently advanced to give scientists the ability to identify prokaryotic species in nature, a requisite for growing microbes in the laboratory. D. Cells with unusual morphological characteristics cannot be grown in the laboratory.
Which of the following is not common to all vertebrates?
a. a forebrain b. a hindbrain c. a convoluted cerebrum d. a dorsal tubular spinal cord e. a midbrain
LPS is found in the outer membrane of Gram-positive bacteria
Indicate whether this statement is true or false.
Chemosynthetic bacteria can oxidize
a. magnesium sulfide. b. copper sulfide. c. hydrogen sulfide. d. oxygen sulfide. e. zinc sulfide.