Multiple Choice
Which of the following factors can speed up the rate of a nucleophilic substitution reaction in organic chemistry?
3. Acids and Bases
Organic Chemistry Reactions
Struggling with Organic Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In the context of organic chemistry reactions, what do the different bands in the same lane of an agarose gel represent?
A
Different pH levels of the solution
B
Different types of chemical bonds
C
Different temperatures during the reaction
D
Different molecular weights of DNA fragments
Verified step by step guidance1
Agarose gel electrophoresis is a technique used to separate DNA fragments based on their size.
When a mixture of DNA fragments is loaded into a well of an agarose gel and an electric current is applied, the fragments will migrate through the gel matrix.
The rate at which each DNA fragment moves through the gel is inversely proportional to its size; smaller fragments move faster and travel further than larger ones.
As a result, different bands appear in the same lane of the gel, each representing DNA fragments of different molecular weights.
These bands can be visualized using a DNA stain, allowing researchers to determine the size of the fragments by comparing them to a DNA ladder or marker of known sizes.
0:29mWatch next
Master What you need to know about types of chemical reactions. with a bite sized video explanation from Johnny
Start learningRelated Videos
Related Practice
Organic Chemistry Reactions practice set
Problem sets built by lead tutorsExpert video explanations