Why is it necessary to use the same restriction enzyme to cut 2 pieces of DNA that are to be joined together?

Answers

Answer 1

Answer: The reason why is necessary to use the same restriction enzyme is because
if we don't, the two pieces of DNA that we are trying to joint won't have matching ends and won't join properly.

To insert that gene we first cut him out from a DNA sequence(sequence 1), so To do that we use a restriction enzyme.

Meanwhile, we want to put that piece into another DNA sequence (sequence 2), so we also have to make a cut to be able to insert the gene and that will also be done with the same restriction enzyme.

This restriction enzyme needs to be the same one that cut the gene out of sequence 1. The enzyme recognizes specific sites in DNA, so when joined they will have ends that will match the gene's ends.

Answer 2

Answer: Each enzyme cuts a specific sequence with specific ends(that will attach to other DNA). If the two pieces of DNA are cut with different enzymes then their ends will not match up and they will not join properly.

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I feel like it is emigration, due to the fact that mutations are random, immigration means coming in and death not really cuz climate change, flood, and landslide will not actually mean full death. In the end i feel like it is emigration but you argue about being death too.

Answer: B

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Which best describes a bird’s role as it eats seeds?

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they use their beaks and they push down really hard to stick it

Answer: D Niche

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What would happen if cells could not reproduce?

Answers

Answer:

Everything living would die

Answer:

Without DNA, cells could not reproduce, which would mean extinction of the species. Normally, the nucleus makes copies of chromosomal DNA, then segments of DNA recombine, and next the chromosomes divide twice, forming four haploid egg or sperm cells.

Explanation: GOOGLE

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