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Amanda [17]
4 years ago
11

Please help Explain why a lack of gravity might cause muscles to weaken

Biology
2 answers:
Elodia [21]4 years ago
7 0

Answer:

Lack of gravity causes you to use less work to move your muscles.

Explanation:

If on Earth your arm weighs 3 pounds, the muscle will only have to move 3 pounds of force. For example, if you were to go on the moon, your arm would have the same mass but there would be less gravity pulling it dow. So now your muscles only need to pull 1 pound. Over extended periods, you would be working less, thus not using your muscles to fullest potential and in result you would get weaker.

Oksi-84 [34.3K]4 years ago
7 0
Because astronauts work in a weightless environment, very little muscle contraction is needed to support their bodies or move around. Without regular use and exercise our muscles weaken and deteriorate. It's a process called atrophy.
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Scientists have engineered bacteria to produce human proteins, such as factor VIII, a blood clotting factor used to treat hemoph
Paladinen [302]

Answer:

- Bacteria cannot remove intronic sequence from a gene, so if the gene for factor VIII were transcribed, it would translate to a nonfunctional protein.  

- The bacteria will not recognize the eukaryotic promoter to transcribe the gene.

Genome engineering steps:

I. Isolate by PCR the mature mRNA of the target factor VIII gene

II. Synthesize a complementary DNA (cDNA) for this mRNA by using a reverse transcriptase enzyme

III. Insertion of the cDNA into a plasmid vector

IV. Expression of the protein in the host bacterial cell through transformation

Explanation:

Bacteria lack the spliceosome (ie., the eukaryotic machinery required to remove introns from the primary mRNA), because bacterial genes do not have introns. Moreover, eukaryotic organisms require several proteins that bind to the promoter sequence and subsequently recruit the RNA polymerase to initiate this process. In bacteria, transcription is controlled by proteins that bind to cis-acting sequences which regulate the transcription of adjacent genes. In contrast to bacteria, eukaryotic genes have many classes of promoter and enhancer elements.

Genome engineering technologies can be used to produce bacteria expressing human proteins derived from synthetically introduced human genes (see steps above). For example, recombinant bacteria expressing the human insulin gene have already been designed by using E. coli as cell factories.

6 0
3 years ago
Which describes a reason fro making a prediction when doing a controlled experiment??
sergejj [24]
A prediction in a controlled experiment allows researchers to form hypotheses and anticipate the results of an experiment. So your answer is D.
5 0
4 years ago
What is .monograph?<br>good evening ​
Lana71 [14]

Answer:

A monograph is a specialist work of writing or exhibition on a single subject or an aspect of a subject, often by a single author or artist.

Explanation:

Facts : -

  • A Monograph has some common characteristics with books and review ( survey ) papers.
  • A monograph is a special type of book written on a single specialized topic, devoted mainly for research works.
  • It could pose some unsolved problems and may provide detained explanation of some research papers.
5 0
3 years ago
1. Of the following people, Rosalind Franklin, James Watson, Francis Crick, and Maurice Wilkins, who may or may not have been gi
insens350 [35]

Answer:

not to sure soz :/

Explanation:

3 0
3 years ago
Which of the following is believed to be common among all mass extinction events? (1 point)
Ipatiy [6.2K]

B. the type of event that causes the extinction

Explanation:

hope this helps :)

8 0
3 years ago
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