Our teacher on the first day of our second semester handed out multiple questions on DNA (because we're currently on that subject) and i can't answer one of the questions.
The question says:"Each student in the classroom had 5 of each nitrogen bases; however, are all the DNA models exactly the same? Why or why not?
Help me answer a DNA question?
2016-01-30 11:24 pm
回答 (2)
2016-01-31 12:53 am
No, because there are 4 kinds of nitrogen bases- Adeneine, Thymine, Guanine and Cystosine. So they each have different structures. A bonds with T and C bonds with G
2016-01-31 12:52 am
This is a strange question because it can be answered either way, depending on what happened in your classroom.
No: students worked independently and made up their own sequences. Given 20 bases, each student made a strand that was ten base pairs long. Each position could be any of the four different bases, so there are 4^10 possibilities, and that's a lot more possibilities than there are students in the classroom.
Yes: only one student in the room had a clue about what was going on with this exercise. She made her ten base pair long DNA. Then she split it right down the middle and gave half to another student, telling him to match that strand with the complementary nucleotides, and give her the leftovers.
Then that student did the same, etc., etc., and everyone in class ended up with the same sequence by dint of complementary base pairing.
No: students worked independently and made up their own sequences. Given 20 bases, each student made a strand that was ten base pairs long. Each position could be any of the four different bases, so there are 4^10 possibilities, and that's a lot more possibilities than there are students in the classroom.
Yes: only one student in the room had a clue about what was going on with this exercise. She made her ten base pair long DNA. Then she split it right down the middle and gave half to another student, telling him to match that strand with the complementary nucleotides, and give her the leftovers.
Then that student did the same, etc., etc., and everyone in class ended up with the same sequence by dint of complementary base pairing.
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