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8090 [49]
3 years ago
11

10) Why do viruses need living hosts, such as bacteria or eukaryote cells? A) The host cell is the source of food for the virus.

B) Viruses depend on the host cells that they infect to reproduce. C) Viruses have a cellular structure which never require a host. D) Viruses depend on a host cell because they lack their own DNA or RNA.
Biology
1 answer:
bija089 [108]3 years ago
7 0

B.) is 100% correct

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MA_775_DIABLO [31]

Answer:

The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable. The cell membrane regulates the transport of materials entering and exiting the cell.

Explanation:

6 0
2 years ago
Determine whether the following statement is true or false: Because introns are largely genetic junk, they do not need to be rem
uysha [10]

Answer:

False

Explanation:

Introns need to be removed precisely because the reading frame will be shifted if removed even single nucleotide too many or leaving an intronic nucleotide in the spliced mRNA .

Extra amino acids will be inserted if large pieces of introns are left in the mature messenger RNA.

In both cases, aberrant protien will be produced if the RNA splicing is not precise, hence they are needed to be removed by precision.

4 0
3 years ago
Which state of matter is the most dense?
Lubov Fominskaja [6]
Solid. it's all stuck and linked together, while liquids are flowing along and gases fly around wherever they please. Hope this helps
4 0
4 years ago
One gene in the human genome may be expressed at a much higher level than another. Can differences in types of cis elements pres
Oksana_A [137]

Answer:

No, CREs usually don't account for differences in gene expression levels.

Explanation:

<em>Cis</em>-regulatory elements (CREs) are non-coding DNA regions that regulate adjacent gene <em>transcription</em>. They usually do it by binding to transcription factors. They are in charge of influencing the rate of which transcription occurs, and less with how much a gene is expressed. On the other hand, trans-regulatory elements are DNA sequences that encode for upstream regulators that can modify or regulate <em>gene expression levels</em>.

Therefore, cis elements are not really in charge of expression levels, mostly transcription rates of single genes, rather. Trans elements are more involved in expression levels.

3 0
3 years ago
The parents of a 13-year-old boy with a sore throat for a week, vomiting for two days, swollen lymph glands, and stiff achy join
telo118 [61]

ANSWER: MITRAL VALVE STENOSIS

EXPLANATION:

The child have the risk of having MITRAL VALVE STENOSIS. It is also referred to as mitral stenosis.

Mitral valve stenosis occurs as results of the mitral valve opening narrowing. Which effect to less blood flowing through it.

The mitral valve is located between two chambers (the atrium and the ventricle) on the left side of your heart.

However, Mitral valve stenosis can lead to different health issues, including blood clots, difficulty breathing, fatigue, and heart failure.

Mitral valve stenosis is specifically caused by rheumatic fever (a childhood disease). This rheumatic fever occurs has a result of the body's immune response to an infection associated with the streptococcal bacteria.

Acute rheumatic fever affects the joints and the heart greatly. It causes joints inflammation temporarily and in severe case causes chronic disability.

Nevertheless, this cardiac complication have treatment and it is based on whether the affected individuals shows symptoms. Medications like blood thinners or anticoagulants (to reduce the risk of blood clots), diuretics, antiarrhythmics (to cure abnormal heart rhythms), beta-blockers (to slow your heart) etc, are being administered based on the level of the complication.

5 0
4 years ago
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