There is an antibiotic called streptomycin that doctors prescribe for infection. The antibiotic combines with the bacteria's ribosomes causing them to lose their function. Consequently the cell dies and so the person gets better! In other words, the antibiotic destroys bacteria by
a. stopping photosynthesis
b. preventing them from packaging materials
c. stopping the production of ATP energy
d. not allowing them to produce proteins.
Ans: d. not allowing them to produce proteins.
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In eukaryotic cells organelles are suspended within _________.
a. golgi b. matrix c. chitin d. cytosol e. none of the above.
Fertilization usually occurs in the
A) ovary. B) uterine tube. C) uterus. D) endometrium (uterine lining).
Before another action potential, what must happen?
a. There must be a restoration of the resting conditions in the membrane. b. The membrane voltage must drop to zero. c. The sodium-potassium pump must cease temporarily. d. All of the membrane gates must be closed at the same time. e. Potassium must move into the cell.
What does biological ancestry describe?
A) the ancestors from whom mitochondria were inherited B) interaction between different generations in a population C) the ancestors from whom specific alleles of nuclear genes were inherited D) family trees or pedigrees