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
stiks02 [169]
3 years ago
9

A classmate has asked you to help them determine the concentration of DNA in their solution. Their A260 reading was 1.69. What w

as the concentration of their DNA
Biology
1 answer:
Gnesinka [82]3 years ago
7 0

Answer:

Acid , phenol or protein

Explanation:

The ratio of absorbance at 260 and 280nm is what is usually used to assess the purity which a DNA or RNA posses. A ratio of 1.8 is generally accepted as being pure for a DNA sample and a ratio of 2.0 is generally accepted also as being pure for RNA. when the ratio is significantly lower in each case, it indicates that there is presence of protein, phenol or other contaminants.

You might be interested in
What is the "scale of cells"?
Nitella [24]
Cell Size and Scale, an elegant and deceptively simple interactive from the University of Utah's Genetic Science Learning Center, enables you to compare the sizes of various really small things. The interactive is available free on the Internet and works on desktop computers, smart phones, and tablets.
5 0
3 years ago
Read 2 more answers
The sea dog francis drake sailed along the coast of _______
PilotLPTM [1.2K]

Answer: West African Coast

Explanation:Hawkins sailed with his cousin (and soon-to-be Sea Dog) Francis Drake to the West African coast in order to capture slaves for trade in the Caribbean and South America, privateering along the way.

6 0
2 years ago
What is the discharge of water moved by a river that has an area of 750m and is traveling 4 m/s?
olga_2 [115]
The question is simply asking for the volumetric flow rate of the water in the river. It<span> is the volume of fluid which passes per unit time. It has units of m^3 /s. We calculate as follows:

Q = 750 m^2 (4 m/s ) = 3000 m^3/s

Hope this answers the question. Have a nice day.</span>
4 0
2 years ago
Read 2 more answers
Identify the biotic factors in the environment shown. Check all that apply.
charle [14.2K]
DescriptionBiotic components, or biotic factors, can be described as any living component that affects another organism or shapes the ecosystem. So the answer would be 1 an 2
5 0
3 years ago
Read 2 more answers
Which type of cell can duplicate indefinitely?
tresset_1 [31]
Stem cells because they are compatible of dividing and renewing themselves after long periods
5 0
3 years ago
Read 2 more answers
Other questions:
  • A host cell is not immediately taken over during which of these? A. prophage infection B. lytic infection C. lysogeneic infectio
    14·2 answers
  • @Studentdoubleo7 SUPER EASY SCIENCE QUESTION PLS HELP
    13·1 answer
  • Which statement best describes why half of an individual's genes come from each parent? a during mitosis the number of chromosom
    15·1 answer
  • Compare and contrast Xylem and phloen<br>​
    8·1 answer
  • Which event takes place first during<br> DNA replication
    5·1 answer
  • Pls help thank you!!!!!!!
    6·1 answer
  • It is possible to quickly determine the _____ of one mineral relative to that of another mineral with the process of ____
    9·1 answer
  • Explain how one of the earth’s natural processes is responsible for creating a natural resource.
    10·1 answer
  • 1. Fill in the blanks
    10·1 answer
  • Which of the following factors is most likely to decrease the stability of an ecosystem?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!