Which of the following statements best describes DNA polymerase?
A. It is an enzyme required to produce a primer needed for DNA replication.
B. It is an enzyme that catalyzes the addition of nucleotides to the 5? end of a growing DNA strand.
C. It is an enzyme that catalyzes the addition of nucleotides to the 3? end of a growing DNA strand.
D. It is an enzyme required to glue pieces of DNA fragments together.
E. It is an enzyme that polymerizes the DNA and keeps the replication fork open.
C. It is an enzyme that catalyzes the addition of nucleotides to the 3? end of a growing DNA strand.
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Researchers noted that only a few aphids changed color to green from their original red. This is an unusual observation among any animals. What research question came out of the observations?
A. Is the color shift of certain aphids due to genetics within a select species? B. Is the color shift of certain aphids due to changes in weather conditions? C. Is the color shift of certain aphids due to genetics or some other factor? D. Do other aphids change colors as they age? E. Will green aphids change their color to red, or remain green as they age?
Reproduction by mitosis only is asexual.
Answer the following statement true (T) or false (F)
The use of lysozyme during the preparation of cheeses and wines is effective in reducing the numbers of
A) fungi. B) viruses. C) bacteria. D) prions. E) all microbes.
The "ozone hole" is caused by the:
A) depletion of ozone in the troposphere by chemicals such as CFCs. B) depletion of ozone in the troposphere due to greenhouse gases. C) increase in warming due to high levels of ozone in the troposphere. D) depletion of ozone in the stratosphere by chemicals such as CFCs. E) buildup of toxic ozone in the troposphere over cities such as Los Angeles from human-caused pollution.