Why are archaeans more tolerant of extreme environmental conditions than bacteria?
What will be an ideal response?
There are differences in their plasma membrane and cell wall. The chemical bond between
hydrocarbon chains and glycerol in the plasma membrane is more resistant to disruption. The
molecular components of peptidoglycan related molecules in cells wall are different, and some
archaean cell walls are assembled from proteins or polysaccharides that make them highly resistant to
disruption by extreme conditions.
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What is secondary active transport?
A. the use of the electrochemical gradient of one molecule to move a second molecule B. the movement of potassium ions following the initial movement of sodium ions C. the use of more than one type of transport protein for the movement of a molecule D. the use of a chemical gradient to generate an electrical gradient
Which of the following can the BLAST program use to identify homologous sequences in a database?
_____ DNA sequence _____ RNA sequence _____ Amino acid sequence _____ Protein molecular weight
Cloning vectors generally possess unique restriction sites and dominant selectable markers
Indicate whether the statement is true or false
The difference between intrapleural pressure and intra-alveolar pressure is
A) the driving force for air flow into and out of the lungs. B) zero. C) atmospheric pressure. D) approximately 100 mm Hg. E) transpulmonary pressure.