1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
balu736 [363]
3 years ago
11

Scientists are working to find a cure for AIDS. HIV, the virus that causes AIDS, is among the 70 percent of viruses that contain

RNA instead of DNA. The HIV infection mechanism is shown in the diagram. Look at the diagram. Select all the statements that specifically give evidence that HIV is a retrovirus. A. The genetic information is copied from RNA to DNA. B. The genetic information is inserted into the DNA of the host cell, where it may remain inactive for many cell cycles and become activated later. C. The genetic information is transcribed and translated into new viral parts. D. The parts assemble into new viruses and burst from the host cell.
Biology
2 answers:
Tju [1.3M]3 years ago
6 0

Answer:

A. The genetic information is copied from RNA to DNA.

B. The genetic information is inserted into the DNA of the host cell, where it may remain inactive for many cell cycles and become activated later.

Explanation:

What characterizes a retrovirus is the presence of the reverse transcriptase enzyme. This enzyme is capable of transforming the single strand of RNA into a double strand of DNA. This is a unique feature of retroviruses, as transformation usually occurs from DNA to RNA (Transcription).

The retroviral DNA produced associates with the host cell chromosomal DNA.

With the formation of DNA, the RNA strand is degraded. However, the DNA produced by reverse transcriptase will also synthesize the new RNA that will constitute the genome of new viruses formed in the infected cell.

zysi [14]3 years ago
5 0

Answer:

Option A, option B. Option A and B are specific to retroviruses, although option c and d are also true, they are not specific only to retroviruses.

Explanation:

Retrovirus is a type of virus that uses RNA as its genetic material. After infecting a cell, a retrovirus uses an enzyme called reverse transcriptase to convert its RNA into DNA. The retrovirus then integrates its viral DNA into the DNA of the host cell, which allows the retrovirus to replicate.

You might be interested in
he bodies of wild-type fruit flies are colored by dark pigments, but an X-linked recessive mutation can confer a yellow, unpigme
bekas [8.4K]

Answer:

We could feed them with another type of food free of silver salts.

Explanation:

When talking about a phenocopy, we are referring to individuals who genotypically should be expressing a determined phenotype, but due to environmental influence, they express another phenotype. This is a non-inheritable phenotype, so it is not considered a mutation.

If we grow thy flies feeding them another type of food that does not include silver salts, and let them mate and reproduce, they will express the real phenotype, because they will not be influenced by the food. In the following generation, there will be dark individuals carrying the dominant allele, and yellow individuals, with the recessive genotype.

7 0
3 years ago
Evidence for evolution includes the presence of _______________________, which are similar structures shared by different specie
Ann [662]
The answer is <span>d. homologous structures.

Homologous structures are </span><span>similar structures shared by different species. For example, the anatomy of joints in bones of birds and dinosaurs, support the idea that these two groups have a common ancestor. But since these two groups are different enough to be separated into different classes, it can be concluded that they evolved from the common ancestor.</span>
4 0
3 years ago
Read 2 more answers
A rock called shale is formed from the skeletons of ancient coral animals.
Alina [70]
Thank you for the information. But what is the question?
Shale is a fine-grained, clastic sedimentary rock composed of mud that is a mix of flakes of clay minerals and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite. The ratio of clay to other minerals is variable.
so the statement is FALSE
8 0
4 years ago
Read 2 more answers
Describe the basic function of each of the three leaf tissues
ohaa [14]

Answer:

Each plant organ (roots, stems, leaves) contains all three tissue types: Dermal tissue covers and protects the plant, and controls gas exchange and water absorption (in roots). Dermal tissue of the stems and leaves is covered by a waxy cuticle that prevents evaporative water loss.

Explanation:

4 0
3 years ago
Read 2 more answers
The paranasal sinuses are lined with a membrane that creates mucus during allergies or the common cold. Presence of mucus and sw
storchak [24]

Answer:

The maxillary sinus, that is, the sinus located in the upper jaw, would be affected.

Explanation:

Sinusitis is a very traditional disease that is associated with headache, discomfort, and increased mucus making.

The causes can be viral or bacterial or even by some inhaled noxa, sinusitis of this type is bilateral, different from sinusitis of dental cause that are usually unilateral.

The paranasal sinuses are the sinuses that pneumatize the head, that is, they generate an internal air current in the bones to be able to heat and disinfect them from those noxas that are inhaled (that is why they are covered by a ciliated mucosa that drags the noxa to the outside and also its structure is pseostratified with mucous cells that secrete mucus enveloping the noxa).

Another function of the paranasal sinuses is to be able to alleviate the weight of the head, since the shell and the bones that remain in the head formation are very heavy, thus generating these cavities filled with air to alleviate the feeling of "heavy head" "When they become inflamed and filled with mucus, they are obliterated or with a reduced space, so the head feels heavier for some people.

The paranasal sinuses are the maxillary sinuses that are in the upper jaw, the sphenoid sinuses that are in the sphenoid, the ethmoid sinuses that are in the ethmoid and the frontal ones that are in the frontal bone that is vulgarly called as the forehead.

5 0
3 years ago
Other questions:
  • Which two extinction risks may be a direct result of the pet trade?
    8·1 answer
  • Which of the following is an example of the prokaryotic cell?<br>​
    10·1 answer
  • A diaphragmatic hernia will most likely result in ______ collapse.
    11·2 answers
  • In humans, red-green color blindness is determined by an X-linked recessive allele (a), whereas eye color is determined by an au
    14·1 answer
  • Compare the properties of the parent and daughter cells in mitosis and meiosis and explain the reason for any differences. it ne
    5·1 answer
  • Chromosomes are made of <br> and contain two identical chromatids.
    15·1 answer
  • In fruit flies (Drosophila melanogaster) there is a dominant allele for red eyes and a recessive allele for white eyes. These al
    9·1 answer
  • The Human Body is made up over
    11·2 answers
  • What were some of the wing-color traits you observed in your individual butterflies?
    11·2 answers
  • Explain how organisms in both of the ecosystems are dependent on their environmental interactions with other living things and w
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!