Single-celled organisms having cell walls and no nucleus are found in the Domain(s)
A. Eucarya.
B. Eucarya and Bacteria.
C. Bacteria and Archaea.
D. Eucarya and Archaea.
C. Bacteria and Archaea.
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Which organisms would MOST likely be isolated from aerobic growth conditions with acetate and a soil sample heated to 80 °C for 10 min?
A) aerobic or facultative anaerobic acetogens B) endospore-forming bacteria C) hyperthermophilic heterotrophic bacteria D) mycoplasmas
What makes phospholipids good at forming cellular membranes?
A. Regions of aliphatic and hydrophilic atoms causing an internalization of phosphorous making a bilayer. B. The polar and non-polar regions create an amphipathic bilayer of phospholipids. C. Covalent and ionic bonds between glycerols create a tight seal around the cell. D. The three saturated fatty tails in phospholipids create a semi solid like structure that maintains a cell's shape.
The widening of blood vessels is
A. vasoconstriction. B. cardioconstriction. C. vasodilation. D. cardiodilation. E. constriction.
All of the following are common functional groups found in biological molecules except
A) phosphate groups. B) carbonyl groups. C) amino groups. D) sulfhydryl groups. E) butyl groups.