Some strains of cancer cells are used quite often in laboratories because they are considered immortal. what unique features of cancer cells make them immortal? a. they are have a limitless growth potential, in part due to their ability to maintain telomere length, and in culture will continue to divide indefinitely b. cancer cells do not require access to nutrients or oxygen, so they can grow indefinitely c. they are resistant to mutation and therefore never die d. they are anchorage independent and never need a surface to grow on e. the dna in cancer cell is not assembled in chromosomes and has no telomeres, which are used as a measure of the "life time" of a cell, so it will never age and divide indefinitely

The symptoms that shelly is experiencing result from the interactions between streptococcus pyogenes (a prokaryote) and the cells (eukaryotes) within shelley's body. although there are similarities between these two types of cells, there are also important differences.

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.

Moving down the ramp from 6 meters to