Which of the following prokaryotic cells contain an outer membrane?
A) Gram-negative bacteria only
B) Gram-positive bacteria only
C) both Gram-positive and Gram-negative bacteria
D) archaea
E) all prokaryotes
A
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Which of the following is not true of the nucleolytic proofreading reaction of bacterial RNA polymerase?
A. Water is the nucleophile. B. It occurs when the enzyme backtracks after incorporating a mismatched base. C. rNTP is the product. D. It involves the melting of several RNA-DNA base pairs. E. All of the choices given are true.
Compared to freshwater fishes, marine fishes:
What will be an ideal response?
The process of meiosis results in ____
a. the production of four identical cells b. no change in the chromosome number from parental cells c. a doubling of the chromosome number d. a reduction in the chromosome number e. two diploid cells
Which of the following organisms belong to the supergroup Amoebozoa?
A. plasmodial and cellular slime molds B. plasmodial and water molds C. choanoflagellates and diplomonads D. amoeboids and euglenoids E. cellular slime molds and radiolarians