1. Sickle cell anemia is a disease in which red blood cells become irregularly shaped. The disease is caused by the presence of an
incorrect amino acid in a certain protein. The disease most likely
occurred due to an altered sequence of nitrogenous bases in the -
A. original DNA in the nucleus.
B. transcribed mRNA strand.
C. tRNA on the ribosome.
D. complementary DNA strands.

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

How many chromosomes are in a gold fish?

Across of blue x blue (both heterozygous) would result in