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GuDViN [60]
3 years ago
5

Give Reasonswhy addation ofacidto a DNA solution causes a changein its absorbance.​

Biology
1 answer:
wlad13 [49]3 years ago
6 0

Answer:

See the answer below

Explanation:

The addition of acid to a DNA causes a change in its absorbance because acids tend to destroy the covalent bonds that hold the base pairs in DNA together.

In other words, acids, especially at high concentrations, denatures DNA. Denatured DNAs exhibit hyperchromic reaction, that is, they show increased absorbance as a result of less interaction between the bases.

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Why do salmon return to their birthplace after they mature?
Aleks [24]

Answer:

b

Explanation:

4 0
3 years ago
What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? hints?
Licemer1 [7]

Simple diffusion is the process by which a substance moves across a cell membrane from an area of high concentration to an area of low concentration. Substances that move by simple diffusion are able to diffuse directly across the phospholipid bilayer of the cell membrane. These substances are generally small and neutral, as large or charged particles cannot cross the phospholipid bilayer. Some examples of molecules that move by simple diffusion are carbon dioxide and oxygen.  

Facilitated diffusion is the process by which a substance moves across a cell membrane from an area of high concentration to an area of low concentration with the aid of a membrane protein. Substances that move by facilitated diffusion are not able to diffuse directly across the phospholipid bilayer of the cell membrane. These substances are generally large and/or charged. They therefore travel through a protein channel in the cell membrane along their concentration gradient. Some examples of substances that can move by facilitated diffusion are glucose, sodium ions and chloride ions.  

The similarities between facilitated diffusion and simple diffusion are:  

They both involve the movement of a substance across a cell membrane along its concentration gradient (from an area of high concentration to an area of low concentration).  

They are both examples of passive transport, as neither requires energy from the cell to move the substance across the membrane.

8 0
3 years ago
DNA has two strands. If the sequence of nucleotides of one strand was known, is it possible to use that information to determine
yanalaym [24]

It is possible to use the information of the nucleotide sequence of one strand to determine the sequence of the other strand.

  • Deoxyribonucleic acid (DNA) is a biological molecule with two strands. Each strand is made up of a sequence of nucleotides. The DNA nucleotides are Adenine (A), Cytosine (C), Guanine (G) and Thymine (T).

  • In a DNA molecule, Adenine forms an hydrogen bond with Thymine i.e. A-T, while Guanine forms an hydrogen bond with Cytosine i.e. G-C.

  • Therefore, it is possible to use the information of the nucleotide sequence of one strand to determine the sequence of the other strand. For example, a strand with ATGCGTACGAT will form the following sequence: TACGCATGCTA

Learn more: brainly.com/question/2823802?referrer=searchResults

3 0
3 years ago
Photosynthesis is an example of
Montano1993 [528]
The answer is <span> an endothermic reaction. </span>Photosynthesis is a type of endothermic reaction because it needs the energy from light (sun) to convert water and carbon dioxide into oxygen and glucose needed by other organisms.

3 0
3 years ago
Read 2 more answers
Is a high pressure system good?
irakobra [83]

Answer:

Yes

Explanation:

subsidence will dry out an air mass by adiabatic or compression heating.

<h2><u><em>hope this helped you</em></u></h2><h2><u><em>please mark me as brainiest</em></u></h2>
5 0
3 years ago
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