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jekas [21]
3 years ago
15

Which of the following best describes the pattern of microbial death? Which of the following best describes the pattern of micro

bial death? The pattern varies depending on the species. Not all of the cells in a culture are killed. The cells in a population die at a constant rate. All the cells in a culture die at once. The pattern varies depending on the antimicrobial agent.
Biology
1 answer:
____ [38]3 years ago
8 0

Answer:

The cells in a population die at a constant rate

Explanation:

Microbial death is the loss of the ability of microbes to reproduce and survive in an environment. When a given microbial population is given a treatment, the microbial cells die at a constant rate. Microbial death rate  is not dependent on the specie and nor on the antimicrobial agent.

Therefore, the microbial cells in a population does not die at once but die at a constant logarithmic rate; the cells decreases exponentially as nutrients decreases and waste product increases.

For example, if 500,000 microbes are treated or in a nutrient depleted environment and 50,000 microbes is left after 1 minute, by the next minute under the same condition 5,000 microbial cells will be left and this pattern will continue, this explains exponential decrease

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When NADH or NADPH transfers electrons to a recipient molecule, the recipient becomes reduced and the activated carriers are oxi
Allushta [10]

Answer:

NAD is a coenzyme found in all cells. It consists of two nucleotides linked through their phosphate groups with a nucleotide that contains an adenosine ring and another that contains nicotinamide.

Explanation:

In metabolism, NAD participates in oxidation reduction reactions. This coenzyme is found in two forms in the cells: NAD and NADH. NAD accepts electrons from other molecules and is reduced, forming NADH, which you can use as a reducing agent to donate electrons. These electron transfer reactions are the main function of the NAD.

In living organisms, NAD can be synthesized from scratch from the amino acids tryptophan or aspartic acid. Some NADs are found in nicotinamide adenine dinucleotide phosphate (NADP), whose chemistry is similar to NAD, although it has different functions in metabolism.

3 0
3 years ago
Chytrids have some unique characteristics that are different from the other groups of fungi. What characteristics make them uniq
xeze [42]

Answer:

Their spores are produced in sac-shaped structures.

Their spores are produced in club-shaped structures.

Their reproductive cells have flagella.

Their reproductive cells have several nuclei.

They live in wet places.

They live in dry places.

Explanation:

The Chytridiomycota, often called chytrids, are unique among all fungi in having motile stages in their life cycles; no other fungi have this trait. These motile stages take the form of zoospores, single cells with a single posterior (at the rear) flagellum.

5 0
3 years ago
Read 2 more answers
You have identified two mutants with same phenotype.
algol13

Answer:

No, there are multiple ways in which different mutations in the same gene can cause the same phenotype

Explanation:

Several different mechanisms of mutation can lead to the same phenotype. For example, lets say our phenotype is that flies have white eyes, and we know that this occurs in one particular gene that normally makes the eye colour red. (the red gene)

These mutations likely rendered the red gene ineffective (as the eyes are not red). However, this could happen in a variety of ways.

  • There could be a single base deletion in the first exon of the mRNA, changing the reading frame of the protein and messing up the entire sequence (a frame shift mutations)
  • The entire gene could be deleted
  • A single base could be substituted in an important site of the gene, for example, one which translates into a catalytic residue or binding site in the protein
  • There could be an inversion at the promoter region of the gene, such that a transcription factor can no longer bind to transcribe the gene.

There are countless other ways in which a mutation could have been caused. Therefore, just because we know the same gene is affected does not mean that we can assume the mutations are identical.

7 0
3 years ago
Humans secreting pheromones is an example of which form of communication?
rosijanka [135]
I’m pretty sure it is biological because it’s your biology transporting into the other persons
4 0
3 years ago
What happens when a lineage splits into two or more lines of descent
kupik [55]

Answer;

B. Speciation

Explanation;

-Speciation is how a new kind of plant or animal species is created. Speciation occurs when a group within a species separates from other members of its species and develops its own unique characteristics.

-The demands of a different environment or the characteristics of the members of the new group will differentiate the new species from their ancestors.

-An example of speciation is the Galápagos finch. Different species of these birds live on different islands in the Galápagos archipelago, located in the Pacific Ocean off South America. The finches are isolated from one another by the ocean.

3 0
3 years ago
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