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cluponka [151]
3 years ago
11

Dr. Paul Ehrlich observed that the differential stain developed by Dr. Gram suggested bacteria could be killed differentially by

chemicals. He called these potential antibacterial agents "magic bullets". Which among the following cell features of bacteria are potential targets for Dr. Ehrlich’s "magic bullets" due to significant difference or absence from humans?
a. DNA
b. Glycocalyx
c. Cytoplasmic membrane
d. Ribosome
e. Cytoskeleton
f. Cell wall
Biology
1 answer:
Illusion [34]3 years ago
8 0

Answer:

d. Ribosome

f. Cell wall

Explanation:

In humans 80s type of ribosome is present and in bacteria 70s type of ribosome is present. Human cells do not have cell wall while bacterial cells have peptidoglycan cell wall. These differences can be targeted by the potential antibacterial agents.

For example, tetracycline antibiotic inhibits the binding of important molecules to bacterial ribosome which ultimately inhibits the protein synthesis in bacteria. Vancomycin antibiotic on other hand inhibits the cell wall formation in bacteria by inhibiting peptidoglycan synthesis.

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Tropical rainforests have high species richness of trees. Which of the following statements provides the MOST reasonable explana
Anastaziya [24]

Answer:

The MOST reasonable explanation is that<em> animals have diversified into the vast number of niches provided by tree diversity</em>.

Explanation:

The tropical rainforest as a biome is located in areas near the equator, where precipitations are abundant and the average temperature is elevated most of the year. As a result of the climatic conditions, this biome gives shelter to a huge number of living organisms. Also, the canopy structure provides many refuges for plants and animals and is an important source of food. It also favors interactions between species. For example, there are too many plant species that live in trees, such as bromeliads,  and at the same time they provide refuge to other small animals, like frogs.

There are also too many species in the rainforest that have not been discovered yet.  

6 0
3 years ago
What is cell surface to volume ratio and why is it important in cell functioning? Can it explain why cells are so small?
MrMuchimi
<span>The main reason surface area to volume ratio is important to a cell is because the surface area to volume ratio determines the rate at which cells uptake nutrients, liquids or gases. For instance, I have two organisms, A and B. Organism A has a surface area to volume ratio of 6:1, whereas organism B has a surface area to volume ratio of 3:1. As organism A has a greater surface area to volume ratio, it means that organism A will be able to take up nutrients, liquids or gases via diffusion or osmosis at a greater rate than organism B, as it has more surface with which to exchange nutrients, liquids or gases. </span>
4 0
3 years ago
Is the space between the bottom of the objective lens and the surface of the slide.
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WORKING DISTANCE is space between the bottom of objective the lens and the surface of the slide.

The distance between front edge of the objective and the lens and the specimen surface ("with the surface of the cover glass in case of the cover glass objective lens") when the specimen is also focused.

The working distance (W.D.) which is determined by the linear measurement of the objective and front lens to the focal plane. In the general, the objective of the  working distance decreases by the magnification and the numerical aperture of both increase. The working distance is the distance and from the front of the lens to be the focal plane

To know more about lens visit:

brainly.com/question/15969013

#SPJ4                

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