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
Alina [70]
3 years ago
7

A researcher heats a solution of DNA and notices that as the temperature increases, the absorbance of ultraviolet light at 260 n

m increases dramatically. This is because __________.
Biology
1 answer:
VARVARA [1.3K]3 years ago
5 0

The question is incomplete as it does not have the options which are:

  1. there are more base pairs synthesized
  2. the DNA becomes supercoiled
  3. the double strands of DNA are separating
  4. DNA gyrase relaxes supercoiling of the DNA

Answer:

3. the double strands of DNA are separating

Explanation:

Ultraviolet light is absorbed by the DNA molecule therefore the UV light is used to find the DNA concentration of a sample.

The ultraviolet light is absorbed by the nitrogenous bases present between the sugar-phosphate backbone of the DNA molecule. The part of the base which absorbs the UV light is the presence of the heterocyclic rings.

Since these heterocyclic rings are involved in the hydrogen bond therefore when DNA exists in its double-stranded form, it absorbs less UV light.

When the DNA sample is heated then the DNA gets denatured and DNA becomes single-stranded. The heterocyclic rings absorb the UV light more easily thus increasing the absorbance.

Thus, Option-3 is correct.

You might be interested in
DNA does all but which of the following?
siniylev [52]

Answer:

The correct answer will be option-is read by ribosomes during the process of translation.

Explanation:

The DNA is a nucleic acid made up of nucleotides which serves as a genetic material of the cell. It stores the information required by the cell in the form of codons made up of nitrogenous bases. The DNA after transcription forms a messenger molecule called mRNA which is read by the ribosomes to code for specific amino acid which binds to form the proteins, the building block of the body.  

Since the mRNA is read by the ribosomes during translation and not DNA directly, therefore, the selected option is the correct answer.

3 0
3 years ago
What are the alternate energy sources that are starting to replace the use of coal in the U.S.?
morpeh [17]
Because if we use too much coal we are wasting fossil fuels and burning coal hurts the environment so the alternative energy sources provide clean energy
3 0
3 years ago
Read 2 more answers
Explain why the photic and aphotic zones of marine biomes are interdependent
andriy [413]
Since the aphotic zone does not recieve sunlight it relys on the photic zone for the sunlight which in terms it does penetrate.
4 0
3 years ago
Read 2 more answers
21. Which polysaccharide is the most abundant on the planet, gives structure to plants, can be digested by
Genrish500 [490]

Answer:

it is answer b

Explanation:

5 0
2 years ago
How do enzymes affect chemical reactions in living organisms
Arisa [49]

Answer:

Enzymes are catalysts for chemical reactions in living things. Enzymes, like other catalysts, lower the activation energy and increase the rate of chemical reac- tions. ... This means that enzymes do not change the direction of a reaction— they just change the amount of time needed for equilibrium to be reached.

Explanation:

6 0
3 years ago
Other questions:
  • What is the difference between whole-chromosome aberrations and point mutations?
    11·1 answer
  • A person with a back or neck injury must be handled with extreme care to prevent injury to the:
    8·1 answer
  • What is the relationship between dna and chromosome?
    10·1 answer
  • Which of these are effects of environmental change on populations? Check all that apply.
    12·1 answer
  • the condition known as heartburn is most often caused by acid regurgitation from the stomach into the esophagus. Some of the dru
    11·1 answer
  • In which process do animals turn food energy into a form their bodies can use?
    6·1 answer
  • Adam writes the following hypothesis, "Grasshoppers prefer plants with higher levels
    5·1 answer
  • Does anyone know if these are correct, I’m just asking because idk if they are correct or not.
    10·1 answer
  • A stop enzyme is used in protein synthesis to stop tRNA from carrying messages from the DNA to the ribosome.
    6·1 answer
  • Why do organisms make one type of protein for a feature while other organisms make two?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!