A science researcher has developed a computer model of the process of DNA replication in a eukaryotic cell. The model includes the following
sequence of bases in one strand of the DNA molecule.

The researcher wants to revise the model to show the transcription of DNA to form mRNA
Which of these revisions to the model would be most useful for the researcher to include?
A
Replace thymine (T) with uracil (U) in the DNA molecule.
B. Keep the two strands of the DNA molecule joined together.
C. Identify promoter and "stop" regions on the DNA molecule.
D. Divide the DNA molecule into pieces that are 40 to 50 bases long

cell regulation is conducted by special proteins.

answer: a) a compound microscope has a greater magnification ability than a simple microscope.

explanation:

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.