During gel electrophoresis, restriction enzymes are used to cut dna into fragments. those fragments are then added into a well cut from a slab of gel. an electric field is passed through the gel, causing the fragments to migrate to the positively-charged terminal at the other end of the gel. the dna fragments separate into bands on the gel because a. smaller fragments move through the gel faster than larger ones. b. larger fragments move through the gel faster than smaller ones. c. fragments that contain a high amount of adenine travel the farthest. d. positively-charged fragments move through the gel faster than neutral ones.

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

Neelaredoxin is a 15-kda protein that is a gene product common in anaerobic prokaryotes. it has superoxide-scavenging activity, and it is constitutively expressed. in addition, its expression is not further induced during its exposure to o2 or h2o2 (silva, g., et al. 2001. j. bacteriol. 183: 4413–4420). which of the following statements best describes neelaredoxin synthesis? a-neelaredoxin is produced at all times; levels are constant even when exposed to o2 or h2o2.b-neelaredoxin is produced at all times; exposure to o2 or h2o2 increases expression. c-neelaredoxin is produced at all times; exposure to o2 or h2o2 decreases or prevents expression. d-neelaredoxin is only produced when there is exposure to o2 or h2o2.

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm