The photosynthetic pigments bacteriorhodopsin and proteorhodopsin are present in ________ and ________, respectively
A) Archaea / Bacteria
B) Bacteria / Archaea
C) Bacteria / Bacteria
D) Bacteria / Eukarya
Answer: A
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If you were designing a method to specifically inhibit prokaryotic transcription, but not eukaryotic transcription, interfering with which of the following would work best?
A) an intercalating agent B) recognition of the promoter region C) DNase activity D) RNA polymerase II activity E) ribosomal binding
Which of the following statements is false?
a. Xylem vessels are similar to drinking straws. b. The transport of water in xylem is due to positive pressure generated by the root. c. The stomata of most plants close at night. d. Water is drawn up to the top of a tree by the pull of transpiration. e. Plants absorb the majority of needed elements from water and soil.
The ____ are very common arthropod Paleozoic fossils, and are extinct today
a. phoronids b. trilobites c. tardigrades d. moss animals e. lophophorate animals What will be an ideal response?
Which of the following is mismatched?
A. Gracilicutes - gram-negative cell walls B. Firmicutes - gram-positive cell walls C. Tenericutes - waxy acid fast cell walls D. Mendosicutes - archaea cell walls E. None of the choices is correct.