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Zolol [24]
3 years ago
12

What is commensalism

Biology
2 answers:
IgorLugansk [536]3 years ago
8 0

Answer:

An association between two organisms in which one benefits and the other derives neither benefit nor harm.

Explanation:

Firdavs [7]3 years ago
4 0

Answer:

Commensalism a relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter.

Hope it helps answer the question:)

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RNA polymerase catalyzes the addition of many rNTPs to a growing RNA.
SIZIF [17.4K]

Answer:

b. Elongation

Explanation:

During the start of the elongation phase of RNA synthesis, the sigma subunit of RNA polymerase of <em>E. coli</em> is released and NusA protein takes its place. This makes the RNA polymerase to move away from the promoter.

During the elongation phase of RNA synthesis, the enzyme DNA dependent RNA polymerase elongates the RNA strand by addition of ribonucleotides to the free 3'-OH end. The process occurs in 5' to 3' direction and the 3'-OH group serves as a nucleophile.  

6 0
3 years ago
Which one of the following is NOT an example of microbial antagonism?
snow_lady [41]

Answer:

e. bacteria producing vitamin K

Explanation:

Microbial antagonism basically refers as microbes versus microbes i-e the indigenous microflora serve a beneficial role by preventing other microbes from becoming established in or colonizing a particular anatomic location in the body.

As all the options mentioned, refers to the microbial antagonism except option E as the normal microbes protect the host by :

1) Producing acids.

2) Bactreocin production

3) By occupying the niches that the pathogens may occupy.

But the microbes cant compete with other microbes by  producing vitamins and growth factors that can be utilized by the host.

Hence option E is the right answer.

7 0
3 years ago
Which phrase accurately characterizes sexually transmitted infections (STIs)?
enyata [817]

Answer:

Are caused by bacteria viruses or parasites

Explanation:

not all cause visible symptoms

it would not be a sexual transmitted infection if not caused by sexual contact

STIs can be contracted by men and women

3 0
3 years ago
Read 2 more answers
The inherent property of a tumor that determines how the tumor responds to radiation is called radiosensitivity. When radiation
Vesnalui [34]

Answer:

That enhances the sensitivity of cancerous tumor cells toward the applied radiation dose.

Explanation:

It is a known fact that tumor cells are very hard to treat so, to increase their sensitivity toward radiation, the body of the patient is treated with special kind of cytotoxic drugs that enhance the sensitivity or exposure of those cancerous cells toward radiation and made them vulnerable. These drugs are applied to modern approaches because of their extensive action toward tumor cells.

3 0
3 years ago
The operon model of the regulation of gene expression in bacteria was proposed by _____.
AlladinOne [14]

Answer: D. Jacob and Monod

Explanation:

An operon is a region of DNA that consists of a single gene regulated by more than one promoter. An operon is a region of RNA that consists of the coding regions of more than one gene. RNA polymerase is the enzyme that binds to promoters and transcribes the coding regions of genes into RNA.

Jacques Monod was the first to demonstrate the preference for certain substrates over others through his studies of E. coli’s growth when cultured in the presence of two different substrates simultaneously.

6 0
3 years ago
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