Answer:
The correct option is option A
Explanation:
Restriction enzymes are endocleases that cleave DNA fragment (<u>of usually four, five or six nucleotide long</u>) at <u>specific sites to produce blunt or sticky ends</u>. They <u>recognize palindromic sequences of host DNA when cleaving the specific sites</u>. The sequences below (on complementary strands) give an example of a palindromic sequences.
5'-CCC║GGG-3'
3'-GGG║CCC-5'
As can be seen above, when read from 5' to 3', the two sequences are the same despite being on opposing strands. And when cut between the guanine (G) and cytosine (C) (as shown above), it produces a blunt end. But when cut as shown below produces a sticky end.
5'- G║AATTC -3'
3'- CTTAA║G -5'
The explanation above shows options C and D are right while option A is wrong (hence the correct option).
Also, bacteria prevent their own DNA from been digested by restriction enzymes by adding methyl group to their restriction sites <u>which prevents restriction enzymes from recognizing restriction sites of their DNA;</u> this generally makes bacterial DNA to be highly methylated. This explanation makes option B right also.
Could you ask again but with more details? I do not understand.
Hey!
Back when I was finding a school I had the same problem! That reminds me of K12!
So what you do is label the areas L that have low pressure which is areas that are near sea level, kind of cold areas.
For H you label those near the center of the map. Which is more of the HOT areas.
It’s currently cold here, burrrr!!
I’ll provide a picture below.
Awesome seeing someone that went to the same online school!
Have a great day,
Eric
Note: you don’t need to label everywhere. If recommend using the map to guide you!
Reply if you have any further questions!!!!
Geologic time is divided into units based upon types fossils found in each area .
I hope that's help !
