The cell wall of Gram-negative organisms
A. has a thick peptidoglycan layer.
B. has a thin peptidoglycan layer.
C. is more permeable to various molecules than the Gram-positive cell wall.
D. is characterized by an outer membrane containing LPS.
E. has a thin peptidoglycan layer AND is characterized by an outer membrane containing LPS.
E
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Transposable elements
A. are DNA sequences that can "jump" within the genome. B. are segments of RNA found in chromosomes. C. result from damage to the chromosomes by things like radiation. D. are another name for translocations. E. are formed during transcription.
Which of the following statements accurately reflects the differences between Batesian mimicry and Müllerian mimicry?
A. In Batesian mimicry the model must behave differently than the mimic; in Müllerian mimicry they behave the same. B. In Batesian mimicry the model must be more dangerous than the mimic; in Müllerian mimicry they are both dangerous. C. Batesian mimicry does not differ from Müllerian mimicry. Two different scientists discovered these two types at the same time, and they disagreed on what to call it. D. Batesian mimicry differs from Müllerian mimicry in that they occur on different continents—Batesian on the North American and Müllerian on the European. E. Batesian mimicry involves invertebrates; Müllerian mimicry involves vertebrates.
In a pedigree, a person whose symbol is filled in and who is associated with the Roman numeral II is ____
a. affected by the trait and in the second generation b. not affected by the trait and in the second generation c. affected by the trait and is the second-oldest child in the family d. not affected by the trait and is the second-oldest child in the family e. affected by the trait and has an identical twin
All organisms are composed of multiple cells.
Answer the following statement true (T) or false (F)