Indicate which of the following are true and which are false. Rewrite any false statements to make them true by changing the underlined words.
__________ Restriction enzymes inhibit the movement of DNA at specific sites.

Question

Indicate which of the following are true and which are false. Rewrite any false statements to make them true by changing the underlined words.

__________ Restriction enzymes inhibit the movement of DNA at specific sites.

Accepted Answer

Hi, everyone. Let's take a look at our next question. Which statement about restriction enzymes is true. A restriction enzymes amplify DNA at specific sites. B restriction enzymes inhibit the movement of DNA at specific sites. C restriction enzymes cut DNA at specific sites or D restriction enzymes repair DNA at specific sites. So our answer here is going to be choice. C restriction enzymes cut DNA at specific sites. These sites are called logically enough restriction sites and these are specific nucleotide sequences. Um very small between 4 to 8 base pairs, often palindromic. So same in sequence, whether you look five prime to three prime or three prime to five prime. So a very famous example would be restriction enzyme eco R one and its restriction site is the sequence G A att C which you can see when you would read back the other direction. It's so it's complementary sequence C TT A AG the same five prime to three prime is three prime to five prime. And when Ir one cuts a DNA molecule at this sequence, it cuts between the G and the A. So it doesn't leave a clean break. Instead it leaves what are called sticky ends. Now, some restriction enzymes do leave a clean break. But the most useful ones that use it most often are ones that cut unevenly like this because this essentially leaves matching ends that allow you to put together DNA from different sources if it's been cut with the same enzyme. So really useful in molecular biology applications where you want to put DNA from different organisms from different places together. You can also use it for analyzing DNA by cutting a DNA sample with certain restriction enzymes and looking at the fragment links that result in comparing them to other DNA samples. But again, their role is that they cut DNA at a specific nucleotide recognition sequence. So they don't amplify DNA as in choice A, that would be PCR, they don't inhibit the movement of DNA at certain sites and they don't repair DNA. That's a much more complex system. Uh There's multiple systems for DNA repair but restriction on them just cuts at a specific site. So our answer here is choice C see you in the next video.

Indicate which of the following are true and which are false. Rewrite any false statements to make them true by changing the underlined words.
__________ Restriction enzymes inhibit the movement of DNA at specific sites.

Verified Solution

Key Concepts

Restriction Enzymes

DNA Movement

True/False Statements

Indicate which of the following are true and which are false. Rewrite any false statements to make them true by changing the underlined words.__________ Restriction enzymes inhibit the movement of DNA at specific sites.

Verified Solution

Key Concepts

Restriction Enzymes

DNA Movement

True/False Statements

Indicate which of the following are true and which are false. Rewrite any false statements to make them true by changing the underlined words.
__________ Restriction enzymes inhibit the movement of DNA at specific sites.