Most of the enzymes used as molecular scissors are known as restriction enzymes. what is the reason for this name? they cut (restrict) dna only at a particular recognition sequence within it. they cut (restrict) dna and remove a single nucleotide each time from the end of the dna. they cut (restrict) dna and remove a complimentary pair of nucleotides from the end of the dna. nextreset

relationships play a major role in a human's emotional and mental wellbeing. healthy relationships with the people around you are even linked to a smaller production of cortisol, a stress hormone.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: