RNAs do ALL of the following in the cell EXCEPT:

A) Carry coded messages from the nucleus to the ribosome

B) Carry amino acids to the ribosome

C) Make up a portion of the ribosome

D) Hold the cell membrane together

The development of_ factored in the development of complex organisms.

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?