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zlopas [31]
1 year ago
11

bioremediation question 4 options: 1) is the use of biological agents to degrade/detoxify pollutants. 2) may involve biostimulat

ion or bioaugmentation. 3) has as its goal the elimination of pathogens. 4) produces xenobiotics. 5) is the use of biological agents to degrade/detoxify pollutants and may involve biostimuation or bioaugmentation.
Biology
1 answer:
shutvik [7]1 year ago
4 0

BIOREMEDIATION is the process that uses microorganisms to change hazardous industrial products (also known as xenobiotics) into less harmful or non-toxic ones. It involves bacteria breaking down these toxic substances. Additionally, bioremediation involves bio stimulation and bioaugmentation (the addition of active bacteria to speed up the current breakdown process) (providing nutrients to existing microbial population to increase their growth rate there by increasing rate of degradation)

Important details to remember are.

No Xenobiotics will be created during bioremediation (it is the process of degrading xenobiotics using microbes)

Pathogen eradication is not the aim of bioremediation (goal of bioremediation is to degrade xenobiotics using microbes)

Therefore, the first four alternatives in the list are incorrect. The right answer is the fifth selection.

2. Clostridium botulinum is a gram positive, obligately anaerobic bacterium found in soil, rivers, etc. that does not require oxygen to survive. It is a spore-forming bacterium, and when these spores germinate, a toxin is produced. In rare cases, these bacteria or their spores are found in inadequately packed canned foods. When these spores are exposed to anaerobic conditions, they germinate and release the botulinum toxin.

A bacterium produces the toxin, which is an exotoxin, and releases it outside of the bacterial cell (endotoxin- lipopolysaccharide and protein complexes which are part of structural components of cell wall of gram-negative bacteria and released)

Exotoxins are sensitive to or heat labile. In other words, exotoxin breaks down when heated or boiled. So, heating canned food can destroy the botulinum toxin. Endotoxins may withstand high temperatures.

stable. Endotoxins cannot be broken down by heat.

So last choice is the right one which indicates botulinum toxin is an exotoxin and heat sensitive.

4. Food tainted with Clostridium botulinum frequently seems unexceptional. It won't taste, smell, or have any undesirable colors.

The first choice is the best response, thus.

5. Listeria monocytogenes is the cause of the food-borne illness listeriosis. Pregnant women and those with compromised immune systems are the major groups at risk for this disease, which has no symptoms in healthy people. This illness's symptom is meningitis.

The last choice is the best response to the question.

Learn more about BIOREMEDIATION brainly.com/question/14353375

#SPJ4

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The answer is D.

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Which two species are likely to have the most similar dna base sequences?
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Based on the attached Image;
The two species that are likely to have the most similar DNA base sequences are C and D. 
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3 years ago
Is the movement of water along the concentration gradient
Nuetrik [128]

Answer:

<em>- Is the movement of water along the concentration gradient: </em><em>Osmosis</em><em>. </em>

<em>- Is the use of energy to move the particles against the concentration gradient: </em><em>Active transport</em><em>. </em>

<em>- Is the movement of particles by diffusion without energy: </em><em>Simple diffusion</em><em>. </em>

<em>- Is the movement of particles along the concentration gradient: </em><em>Passive transport</em><em>.</em>

Explanation:

The mechanisms of cellular transport involve all the processes that the cell carries out to incorporate substances into its interior or send them to the extracellular space, through its semipermeable cell membrane.

<h3>- Osmosis</h3>

Is a type of transport that consists of the passage of water from a space with a lower concentration of solutes to one with a higher concentration, in order to reach equilibrium, following a concentration gradient.

The concentration gradient is given by the difference in concentration between two substances, which indicates the direction in which molecules, such as water, should move from one place to another.

<h3>- Active transport</h3>

Unlike passive transport mechanisms, which depend on a concentration gradient that determines the movement of particles, in active transport there are two characteristics that define it:

The passage of substances into the cell against a concentration gradient.

The use of energy to carry out this process.

In this case, the passage of substances through the cell membrane will be according to the requirements of the cell, or when they cannot pass through the membrane.

<h3>- Simple diffusion</h3>

According to the characteristics of the cell membrane, some substances can pass freely through it while others require special mechanisms. When a molecule is able to pass through the membrane without the use of special mechanisms or energy we speak of simple diffusion.

In a cell membrane, whose composition is by hydrophobic or non-polar lipid molecules, simple diffusion allows the passage of non-polar molecules, gases and alcohol.

<h3>- Passive transport</h3>

Refers to the mechanism of entry and exit of substances from the cell that does not require the use of energy.

The mechanisms involved in the passive transport of the cell are simple diffusion, osmosis, facilitated diffusion - which requires special conveyors or channels - and ultrafiltration, which depends on hydrostatic pressure. Examples of substances using this mechanism are lipid molecules, water and electrolytes.

Learn more:

Lipidic bilayer and cellular transport brainly.com/question/6955159

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If you were to observe the activity of methylated dna, you would expect it to _____.
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If you observe the activity of methylated DNA, you would expect the change in the activity of DNA molecule.

<h3>What is the activity of methylated DNA?</h3>

DNA methylation is a process by which methyl is added to the DNA molecule which can change the activity of a DNA without changing the sequence. When it is located in a gene promoter, DNA methylation acts to repress gene transcription.

So we can conclude that If you observe the activity of methylated DNA, you would expect the change in the activity of DNA molecule.

Learn more about DNA here: brainly.com/question/1328358

#SPJ1

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