Who developed protein crystallography and discovered the structure of vitamin b12?

1 answer:

6 0

Dorothy Mary Crowfoot Hodgkin was the first to develop protein crystallography and she won Nobel Prize for that discovery ( third woman to win the Nobel Prize in Chemistry). Hodgkin confirmed the structure of penicillin but also realized the structure of vitamin B12 by x-ray crystallography analysis. She advanced the classical technique of X-ray crystallography.

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Describe how the structure of a virus aids in its ability to infect cells.

Varvara68 [4.7K]

Virulence factors of virus aids in its ability to infect cells.

Explanation:

Virulence factors help pathogenic microbes to infect host cells by virulence mechanisms – invade host, cause and spread disease, evade the defense or immune mechanism of the host. These factors makes the virus to grow, replicate, and modify the host cells due to its toxicity.

Viruses binds to the receptor protein of the host cell.

Different types of virulent factors are: invasion factors, adhesive or adherent factors, capsules, endo and exotoxins, etc.

The virulence factors decides the severity and rate of spread of an infection

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defon

Biotic factors are those that are living in an ecosystem, such as plants and animals, while abiotic factors are those that are not, such as rocks, temperature, water, sunlight, soil etc.

C is correct for number 2 because broadleaf trees are a biotic factor, while precipitation, or rainwater, is abiotic.

A is incorrect because both are biotic factors, since both are living

B is incorrect because both are abiotic factors, since both are nonliving

D is incorrect because both are biotic factors, since both are living

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4 years ago

Which of the following statements about biodiversity is not true?

galina1969 [7]

I believe your right C seems like the best choice to me.

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3 years ago

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Lizard is a poikilothermic animal why

jeka57 [31]

Answer:

Lizard is a poikilothermic animal because lizards are those animals that do not require a fixed body temperature, their temperatures can fluctuate with little to no adverse effects to their overall health. 

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Reptiles are cold-blooded, or ectothermic, animals. This means that they cannot produce heat in their own bodies, and have to rely on their surroundings to keep warm. By moving in and out of sunlight, reptiles can keep their body temperature at a steady level throughout the day.

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gregori [183]

A would be the best answer if you read on it they talk about how much damage it really did

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3 years ago

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