What purpose is served by dna ligase? a. to break hydrogen bonds in the dna structure b. to seal single stranded breaks in the dna double helices c. to seal double stranded breaks in the dna single helices d. all of these e. none of these?

Asample of soil from a c horizon is light brown in color and has a high content of a mineral called feldspar. which of the following statements is most likely true

Consider the activity and specificity of the three enzymes.pepsin is most active in the human and to digest

You have trained year for a marathon. in your first attempt to run a marathon, you decide that you want to complete this 26-mile race in 4-5 hours. a. what is the length of a marathon in kilometers (1mile= 1.6 kilometers). b. what would your average speed have to be to complete the race 4.5 hours? give your answer in kilometers per hour.