Which of the following tools of dna technology is incorrectly paired with its use?
a. electrophoresis—separation of dna fragments
b. dna ligase—cutting dna, creating sticky ends of restriction fragments
c. dna polymerase—polymerase chain reaction to amplify sections of dna
d. reverse transcriptase—production of cdna from mrna

What are the three different shapes, or structures, of carbon-based molecules

You are given an electron micrograph of a bacterial cell. in the micrograph you can clearly see three thin layers of different densities surrounding the cell. based on the micrograph, you can infer that this cell is and would appear after application of the gram stain procedure. gram-negative / pink gram-positive / purple gram-positive / pink gram-negative / purple

How is anaerobic respiration affected by changes in temperature? (5 points)based on the conditions of early earth, what conclusion can you draw about the amount of anaerobic respiration that was occurring at earth’s beginning? explain your answer.(5 points)if there was a sudden drop in temperature after the evolution of the first living cells, predict how that might have affected the changes in the atmosphere and the evolution of cyanobacteria and other autotrophs. explain your answer. (5 points)