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guajiro [1.7K]
3 years ago
10

Why are fatty acids more saturated in warm temperatures while they are unsaturated in cold temperatures?

Biology
1 answer:
Readme [11.4K]3 years ago
6 0

Answer:

The increment of temperatures favors the oxidation of fatty acids promoting the saturation of them.

Explanation:

When the fatty acids are in an environment of high temperatures they start oxidizing so unsaturations start to spontaneously happen. This process happens in cell membranes as well as in the foods. Saturated fatty acids are more prejudicial to health than unsaturated ones.

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True or false? One possible way to alter chromatin structure such that genes could be transcribed would be to make histone prote
Dmitrij [34]

Answer:

False

Explanation:

The histones that are more positively charged, tight hardly to negatively charged DNA. So, enzymes, such as acetyltransferases, that reduce the positive charge of histones promote transcription.

Chromatin structure and its modifications can change the package of the DNA and consequently, alter the gene expression. The most common modifications of the chromatin are covalent modifications such as acetylation/deacetylation (by acetyltransferases and eacetylases), methylation (by methyltransferases), and phosphorylation (by kinases).  This is the way of gene expression regulation.

The effects of modifications are different, for example methylation promotes  condensation of the chromatin and as a consequence, prevents binding of transcription factors to the DNA (transcription is repressed).

Acetylation loosens the association between nucleosomes and DNA (because it neutralizes the positive charge of histones) and consequently promotes transcription. Deacetylation is a process opposite to acetylation.

5 0
2 years ago
_____ blood analysis provides qualitative information such as size, shape, and ratio of one cell type to another.
alexira [117]

Answer: Differential

Explanation:

The differential blood analysis provides information about the different components of the blood.

Analysis of blood is required in order to detect any disease. This test can detect the difference between the normal cell and abnormal cell.

The blood test can diagnose any type of disease like leukemia, any inflammation, cell shape, size and then compare it with normal cells of the body.

5 0
3 years ago
Which of the following is true regarding the process shown above?
melisa1 [442]

Answer: it's C you nice

Explanation:

5 0
2 years ago
Who discovered that dna was the genetic material or transforming factor that could convert nonvirulent r-type streptococcus pneu
KatRina [158]
Discovery
               In 1928 it was discovered by Frederick Griffith in an experiment generally known as transformation.

Experiment
                 
 In his experiment he considered two strains of <em>streptococus pneumonia,</em> one was R-type which was non-virulent and cause no disease in mice, other was virulent and S-type which cause disease and at last death of mice.
This experiment was comprised of four steps which are as follow:

 Step 1:
           First he injected living strain of S into mice, after sometime mouce died.

Step 2:
          He injected living strain of R into mice, the mice alive as he did not got any disease.

Step 3:
         He injected heat killed strain of S into mice and mice remain alive.

Step 4:
           He mixed living R strain with heat killed S strain and then inject into mice. As a result the mice died.

Conclusion:
                  It was found that genetic material from heat killed S stain were transferred to living R (non-virulent) strain, as a result R become virulent and cause the death of mice.

7 0
2 years ago
Why is the best definition of directional selection
Anna35 [415]

Answer: Directional selection occurs when individuals with traits on one side of the mean in their population survive better or reproduce more than those on the other. ... Directional selection does the “heavy lifting” of evolution by tending to move the trait mean toward the optimum for the environment.

7 0
3 years ago
Read 2 more answers
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