What kind of bond is at the arrow in Figure 2.4?
a. Disulfide bridge
b. Double covalent bond
c. Hydrogen bond
d. Ionic bond
e. Peptide bond
Answer: e. Peptide bond
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Neisseria gonorrhoeae are present in the vaginal compartment with nonpathogenic commensal Neisseria spp. When the patient's system begins to attack the pathogenic species, some of the cells autolyze releasing their genetic material into the environment. Other Neisseria species are then capable of taking up the DNA from the organisms that have autolyzed altering their genetic makeup and changing
their pili protein structure. This process can be described as: a. competent cells being transformed by ge-netic recombination. b. bacteria ingesting DNA and using the in-formation for transcription. c. mutation of the pathogenic organisms re-sulting in enhanced infection. d. transformation and genetic recombination resulting in expression of new pili proteins to evade the immune system.
Reduction of nitrogen-oxygen ions and compounds by some bacteria is called ________.
A. aerobic respiration B. denitrification C. deamination D. nitrification E. fermentation
What can you conclude from data in the figure?
A) The lipase from bacteria X is insensitive to changes in pH. B) Only the lipase from bacteria Y denatures at high temperatures. C) Bacteria X likely lives in an environment that undergoes large changes in temperature. D) The lipase from bacteria Y is more active than the lipase from bacteria X at 20°C.
Which of the following is NOT an obstacle for expressing cloned eukaryotic genes in Bacteria?
a. Introns must be removed. b. Sequences may need editing due to codon usage. c. The host may not be able to perform post-translational modifications. d. All of the above are obstacles.