Why is penicillin ineffective against gram-negative bacteria?
a. Penicillin is not toxic to gram-negative bacteria.
b. Penicillin is pushed away from the cell membrane by the fimbriae.
c. Gram-negative bacterial do not have receptors for penicillin to attach to.
d. Gram-negative bacteria do not have channels or pores in its membrane for penicillin to pass through.
e. Penicillin cannot reach the thin peptidoglycan layer easily because it is protected by the bacteria’s outer
membrane.
e
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The analysis of genetic relatedness by observing the DNA fragmentation patterns resulting from restriction endonuclease cleavage is referred to as ________.
A. genetic chunking B. genetic patterning C. genetic restriction D. genetic fingerprinting
Explain why chloroplasts and mitochondria both have a sac-within-a-sac structure
What will be an ideal response?
Give a possible interpretation of the finding that the number of mutational events that occur during the transition from
normal to malignant cells is much larger than previously thought. What will be an ideal response?
From looking at the plant maize plant you conclude:
A) That the missing nutrient is mobile and likely Ca. B) That the missing nutrient is mobile and likely N. C) That the missing nutrient is non-mobile and likely Ca. D) That the missing nutrient is non-mobile and likely N.