Fill in the blanks: In electrophoresis, an electric current is applied to the matrix of a gel-like substance known as agarose, in which the DNA fragments are placed. DNA is_charged and will move from the_ electrode (black) to the electrode (red) at the pH pf the gel and buffer. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. positively; positive; negative b negatively; positive; negative positively; negative; positive d negatively; negative; positive

In the protocol for extracting DNA, what is the purpose of the clear shampoo in the DNA extraction buffer? In the protocol for extracting DNA, what is the purpose of the clear shampoo in the DNA extraction buffer? Shampoo contains detergents, that help to break down lipids in cell walls, thus freeing the DNA. Shampoo contains detergents, that help to break down proteins in cell membranes, including the nuclear membrane, thus freeing the DNA. Shampoo contains salts, that help to break down lipids and proteins in cell membranes, including the nuclear membrane, thus freeing the DNA. Shampoo contains detergents, that help to break down lipids in cell membranes, including the nuclear membrane, thus freeing the DNA.

True or false: Ethidium bromide is added to your hot liquid agar solution to help separate the DNA bands by size and overall charge. True False

In E. coli, the DNA helicase is loaded onto the DNA by __________ and activated when __________ binds the helicase.   Question 24 options:   DnaC; DnaG   DnaA; DnaB   DnaG; DnaC   DnaB; DnaA   DnaC; DnaB

In analyzing the base composition of a DNA sample, a student loses the information on pyrimidine content. The purine content is A = 27% and G = 23%. Using Chargaff’s rule, reconstruct the missing data and list the base composition of the DNA sample. (Include a brief explanation of how you got your results).