What makes the lifestyle and genome of Nanoarchaeum equitans unique?
What will be an ideal response?
Answer: N. equitans is the only identified intracellular parasite within the Archaea. It lives within the periplasm of Ignicoccus. N. equitans depends upon its host for the biosynthesis of many essential amino acids and cofactors and may not even be able to make its own ATP. The genome of N. equitans, is one of the smallest ever described and is the smallest among Archaea. It is also the most dense genome, with over 95% of the genome predicted to encode for proteins. Based on the genes that are missing from the genome, N. equitans may depend on Ignococcus for both carbon and energy. The key enzymes for DNA repair, DNA replication, transcription, and translation are present in N. equitans genome.
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The chemical bonds that form when atoms that have lost electrons are electrically attracted to atoms
that have gained electrons are called ____.
a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds
Water is an excellent solvent because
a. it forms spheres of hydrogenation around charged substances pulling their individual molecules away from one another. b. it forms hydrogen bonds with many substances. c. it has a high-heat containing property. d. of its polarity. e. of all of these
The difference between results from the subset and
results from the whole is a. the variable. b. sampling error c. the prediction. d. the control. e/ the hypothesis.
Collagens interact directly with which of the following types of junctions?
A) gap junctions B) tight junctions C) hemidesmosomes D) desmosomes E) None of the above are correct.