Which of the following statements most accurately describes transformation in bacteria?

A. Transformation is the creation of a strand of RNA from a DNA molecule.
B. Transformation is the infection of cells by a phage DNA molecule.
C. Transformation is the creation of a strand of DNA from an RNA molecule.
D. Transformation is the assimilation of external DNA into a cell.


Ans: D. Transformation is the assimilation of external DNA into a cell.

Biology & Microbiology

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Activation energy is the energy

A) required to transform all reactants into their reactive state. B) given off as the products in a chemical reaction are formed. C) absorbed as ?G0' moves from negative to positive. D) needed by an enzyme to catalyze a reaction without coenzymes.

Biology & Microbiology

Rickets is caused by

a. overexposure to UV radiation. b. an excess of calcitonin. c. inadequate amounts of vitamin D. d. an excess of ascorbic acid. e. a fetal deficiency of thyroid hormone.

Biology & Microbiology

From a human developmental standpoint, what is the significance of Hox genes?

What will be an ideal response?

Biology & Microbiology

Which of the following would be the strongest evidence for or against the necklace's effectiveness?

A) A bar graph comparing the percentage of players who do with the percentage of players who do not wear the necklace B) A scatter plot showing days on the disabled list and percentage of players who do or do not wear the necklace C) A bar graph illustrating the satisfaction levels of the players who wear the necklace D) A bar graph comparing batting averages of the players who wear the official titanium necklace and those who were unknowingly wearing a fake titanium necklace

Biology & Microbiology