When a recipient cell acquires a piece of naked DNA from the environment, it is called ________.
A. conjugation
B. transfection
C. transduction
D. transformation
Answer: D
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When bacterial genes are transferred to another bacterium by a virus, it is called
A. transfection. B. transformation. C. transduction. D. conjugation.
A scientist is studying a population of feral cats in his city. He notes that the r of this population is 1. What does this mean (assuming that he is evaluating population size on a yearly basis)?
A. that the population of feral cats doubles in size each year B. that the population of feral cats triples in size each year C. that the population of feral cats remains the same size from year to year D. that the population of feral cats decreases in size by 10% every year
Staphylococcus aureus is a gram-positive organism that produces the enzyme ?-lactamase, which renders certain types of antibiotics inactive. The mode of action that is prevented in certain antibiotics sensitive to this enzyme is:
a. cell wall synthesis. b. protein synthesis to the 30S ribosomal subunit. c. protein synthesis to the 50S ribosomal subunit. d. deoxyribonucleic acid (DNA) synthesis.
Comparing the sequence of ________ in the genomes of many organisms has allowed evolutionary biologists to create a comprehensive "tree" of life showing that every organism falls into one of three domains: Bacteria, Archaea, and Eukarya
Fill in the blank with correct word.