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OverLord2011 [107]
3 years ago
15

I have one question left and I dont know if the true and falses are right, help?

Biology
2 answers:
alex41 [277]3 years ago
4 0
It’d be asexual if I had to guess.
Romashka-Z-Leto [24]3 years ago
3 0
The true and falses are right but I don’t know the answer:(
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Which of the following statements regarding restriction enzymes is NOT true?
Anni [7]

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.

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3 years ago
The movement of matter across a cell membrane against a concentration difference is called
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The movement of matter across a cell membrane against a concentration difference is called an Active Transport.

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The portion of the nervous system that has voluntary control over skeletal muscles is the _________ _________ division.
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The nervous system controls the activity of muscles<span> and glands. ... Which is not a function of the motor </span>division<span> of the nervous system?</span>
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Suppose you are studying the transport of a certain polar molecule across the plasma membrane of cells in culture. Over a period
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Answer:

C. facilitated diffusion

Explanation:

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And electronic asprin I don't see how that would help.

So, I think the answer would be the b. Virtual doctor appointments.
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