Which of the following contribute(s) to the differences between the members of the Domain Archaea and the Domain Bacteria?
A. Archaea have isopranyl glycerol ethers rather than fatty acid esters in their membrane lipids.
B. Archaea differ from bacteria in their tRNA composition, ribosome structure, and antibiotic sensitivity.
C. Archaea lack muramic acid.
D. All of the choices are correct.
Answer: D
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Which one of the following pairs includes junctional complexes that perform similar functions?
A. tight junctions and adherens junctions B. tight junctions and desmosomes C. desmosomes and adherens junctions D. desmosomes and plasmodesmata
The rate at which producers convert solar energy into chemical energy is an ecosystem’s ____
a. standing crop biomass b. biogeochemical cycle c. net primary productivity d. efficiency e. gross primary productivity
________ the direct source of energy for cells
A) Fats are B) Glucose is C) ATP is D) Amino acids are
A new drug for depression was developed by taking a disaccharide, sucrose, and combining several different hydrophilic functional groups onto the molecule. After hearing about its structure, you are positive that this molecule has zero direct effect on
the brain. Why? What will be an ideal response?