Question

dna is
positively charged
negatively charged
neutral
true or false: the complementary base strand to the dna sequence atggcta is taccgat.
true
false
what is one interesting thing you know about dna that you did not know before?
your answer
gel electrophoresis separates dna according to
size
complexity
gender
strength

Explanation:

First Question (DNA charge)

DNA has a sugar - phosphate backbone. The phosphate groups in the backbone are negatively charged (each phosphate group has a net negative charge). So DNA is negatively charged.

In DNA, adenine (A) pairs with thymine (T), and guanine (G) pairs with cytosine (C). For the sequence ATGGCTA:

• A pairs with T
• T pairs with A
• G pairs with C
• G pairs with C
• C pairs with G
• T pairs with A
• A pairs with T

So the complementary strand should be TACCGAT. So the statement is true.

One interesting thing is that DNA can be damaged by various factors like UV radiation, and cells have complex repair mechanisms (like nucleotide excision repair) to fix this damage. Another could be that almost every cell in a multicellular organism has the same DNA, but different genes are expressed in different cell types to give them unique functions.

Answer:

negatively charged

Second Question (Complementary base strand)