Which of the following is TRUE about the accuracy of DNA replication?
A) Many errors are made during DNA replication, but this does not matter because repair enzymes mend the errors.
B) DNA polymerase always makes a perfect copy of the original DNA.
C) DNA polymerase makes very few errors, so no repair enzymes are needed.
D) Many errors are made during DNA replication, but this does not matter because of the immense size of the DNA molecule.
E) The few errors made by DNA polymerase are usually corrected by repair enzymes.
E
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The disease, sickle-cell anemia is common in malaria-infested areas because individuals that are heterozygous for the gene (AS) have enhanced resistance to malaria over normal individuals (AA). Individuals with severe sickle-cell anemia (SS) usually die before reproduction. If this population moves to an area without malaria, what will happen to the allele frequency of the A allele over time?
A. It will go up because there is no sickle cell anemia. B. It will go down because there is no malaria. C. It will go down because there is no sickle cell anemia. D. It will go up because there is no malaria.
The taxonomic category that includes all bipedal primates is called _____________________
Fill in the blank(s) with correct word
Lysozyme is an enzyme that lyses ________.
A. bacteria B. parasites C. viruses D. fungi
The driving force for blood circulation is ____
a. contraction of the atria b. contraction of the ventricles c. closing of the AV valves d. opening of the AV valves e. closing of the aortic valve