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.
Answer;
Lordosis
Lordosis is the term for the spine when its alignment is curved anteriorly, instead of side to side, usually as a result of multiple cervical vertebral fractures, as seen in the neck of the elderly.
Explanation;
Lordosis is a dramatic inward curve of the spine and can negatively impact the posture. It is often referred to as a swayback or hyperlordosis- hyper meaning excessive, and lordosis being the inward curve.
b. radioactivity
The process by which atomic nuclei spontaneously decay is called radioactive decay. Explanation : This is also known as nuclear decay on a general basis In this process of radioactivity the unstable atomic nucleus loses energy .
Answer:
The rising temperature will increase the rate of anaerobic respiration, up to a point. Beyond that the heat will start putting a stress on the organism and the rate will go down. More heat will eventually kill the organelles.
Explanation:
Disease that can be transmitted from bats to humans probably rabies.
Rabies is caused by a virus and can be transmitted by mammalian like dogs or bats. The symptoms can be fever, partial paralysis, anxiety, paranoia, hypersalivation(excessive drooling), hydrophobia(fear of water/drinking).
