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melamori03 [73]
3 years ago
13

Which of the following statements best describes the termination of transcription in prokaryotes?

Biology
1 answer:
harkovskaia [24]3 years ago
6 0

Answer:

B. RNA polymerase transcribes through the terminator sequence, causing the polymerase to fall off the DNA and release the transcript.

Explanation:

Termination of transcription in prokaryotes can be performed in two ways:

  • Rho dependent-Rho factor is a protein that has the ability to bind for RNA polymerase, and to separate it from the template DNA strand
  • Rho independent-there is a specific sequence in DNA  rich C and G nucleotides. As RNA polymerase gets to that region, it folds the DNA and creates the hairpin. The hairpin causes the polymerase to fall.
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QUE SON LA BIOMOLECULAS​
DIA [1.3K]

Son consideradas biomoléculas aquellas moléculas que forman parte de los organismos vivos.  

Las moléculas son las unidades físicas de la materia, que se forman a partir de la unión de dos o más átomos agrupados a través de enlaces químicos.

Las biomoléculas se clasifican en inorgánicas u orgánicas.

• Las biomoléculas inorgánicas se encuentran ampliamente en la atmósfera. El agua, algunas sales como el cloruro de sodio, y gases como el oxígeno, son ejemplos de biomoléculas inorgánicas.  

• A las moléculas como azúcares, proteínas, combustibles, entre otras, las cuáles contienen átomos de carbono, hidrógeno, oxígeno y a veces nitrógeno se les llama moléculas orgánicas.

Cuando las moléculas orgánicas forman parte de la materia viva, se les conoce como biomoléculas orgánicas, las cuales incluyen fundamentalmente glúcidos, lípidos, proteínas y ácidos nucleicos.

Por lo tanto, podemos concluir que las moléculas (compuestos que se forman a partir de los elementos químicos) que se encuentran formando los seres vivos se conocen como biomoléculas y se clasifican en inorgánicas u orgánicas.  

Aprende más acerca de las biomoleculas aquí: brainly.com/question/24345880            

5 0
3 years ago
What is skin cancer and how does it occur?
Dafna11 [192]

Answer:

Skin cancer refers to the abnormal activity of skin cells associated with carcinogenesis

Explanation:

This disease is associated with the DNA damage (mutations) often caused by  the irrational exposition to UV sun rays that trigger DNA mutations capable of both inactivating tumor suppresor genes and activating oncogenes

3 0
3 years ago
Read 2 more answers
Match each rock with the correct description.
Sergio039 [100]

Answer:

quartizide - 5

limestone - 1

shale - 3

basalt - 4

sandstone - 2

correct me if im wrong.

8 0
3 years ago
Read 2 more answers
Despite the aggressive defense of the cardiovascular system by the immune system, some microbes can invade and establish an infe
Anton [14]

Answer:

The mismatch is on the statement that says "Bacillus anthracis produces antioxidants to combat lysosomes."

Explanation:

A. Bacillus anthracis produces antioxidants to combat lysosomes.

This is incorrect. Bacillus anthracis is a bacterium that forms aerobic spores, whose structures contain the genetic material of the bacteria and that resist long periods without water or nutrients, in conditions of extreme heat or cold. Bacillus anthracis is found in some forms, one of this, is the cutaneous anthrax. Cutaneous anthrax is a skin infection caused by direct contact with the bacterium.

B. Coxiella burnetii produces an endospore-like structure.

Coxiella burnetti is a bacterial zoonosis and produces structures similar to endospores, which are cells or forms of resistance that develop certain bacilli against heat, desiccation, radiation and chemical influences.

C. Trypanosoma cruzi cloaks itself in host proteins to avoid immune recognition.

Trypanosoma cruzi is characterized by being a parasite with great antigenic variability. In the host infected with Trypanosoma cruzi, the membrane protein called cruzipain, is a response used in favor of the parasite. The humoral response to the cruzipain antigen, the largest antigen of Trypanosoma cruzi, is implicated in the pathogenesis of experimental Chagas disease.

D. Borrelia burgdorferi changes its surface antigens to avoid immune recognition

Borrelia burgdorferi is a bacterium that produces Lyme disease, once infected, the bacterium recombines by altering the antigens of its membrane, preventing immune recognition.

5 0
3 years ago
Estimate the number of cells that belong to each phase of the cell cycle
svlad2 [7]

There are two ways to do this.  You could actually learn the phases and count each one.  Since you're posting here, it's a safe bet you have no intention of actually learning the material.  The second is to estimate based on the total number of cells.  At any given time, you will have approximately the following percentages for each phase of the cell cycle:

Interphase - 96%

Prophase - 2.5%

Metaphase - .5%

Anaphase - .5%

Telophase - .5%

In the picture, there are about 120 cells.  Now you have to do a little 5th grade math to calculate the approximate mumbers of each phase.  So, for Interphase, we multiply 120 x .96 = 115.  For Prophase we multiply 120 x .025 = 3.  For Metaphase, Anaphase, and Telophase, we multiply 120 x .005 = .6, which rounds up to 1 each.  Now, as I specified, these numbers are approximate.  Looking at the picture, I count three that are in Metaphase, two that are in Anaphase, and at least three in Telophase. And there are more than three in Prophase.  The best way to figure this out is to print the picture and, using a guide from the internet, count the cells in each phase, marking them off as you count them so that you don't recount them.  Good Luck!

5 0
3 years ago
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