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olga_2 [115]
3 years ago
12

A scientist discovers that a soil bacterium he has been studying produces an antimic robial that kills gramnegative bacteria. Sh

e isolates and purifies the anti microbial compound, then chemically converts a chemical side chain to a hydroxyl group. When she tests the anti microbial properties of this new version, she finds that this antimicrobial drug can now also kill gram-positive bacteria.Thenew anti microbial drug with broad-spectru mactivity is considere dto be which of the following?a. resistantb. semisyntheticc. syntheticd. natural
Biology
1 answer:
frozen [14]3 years ago
8 0

Answer:

The correct answer will be option-B (Semi-synthetic)

Explanation:

Chemical drugs can be synthesized through many ways on the basis of which they can be categorized:

1. Natural Drug: The drug prepared from the natural extracts.

2. Synthetic Drug: The drug is synthesized by chemical reactions.

3. <u>Semi-synthetic Drug</u>: The drug which is neither completely natural nor synthetic that is they are prepared from the natural extracts by modifying them.

Since in the given question, the drug was prepared by the converting side chain to the hydroxyl group of the antimicrobial drug therefore it is considered as the semi-synthetic drug and Option-B is the correct answer.

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galina1969 [7]

Answer:

The correct answer is-

Hypothesis: Antibiotics cause weight gain in cows.

Independent Variable: Antibiotic pill

Dependent Variable: Weight of cow

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Explanation:

The Independent variable is the variable that causes the response from the dependent variable or affects the dependent variable in this study the antibiotic pill affects the weight of cows so The independent variable is an antibiotic pill and the dependent variable is the weight of cows.

The control group is the group of subjects that did not get the treatment in a scientific study in the case of this study group of cows that receives the placebo pill is the control group and the experiment group is subjects that receive the treatment which is a group with the antibiotic pill.

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Can you think of a situation where a high temperature would not result in an increase in photosynthesis?
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Answer:

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