Which of the following best describes a plasmid

A. a small piece of DNA outside the chromosome
B. Segments of chromosome that code for a functional product
C. A segment of chromosome which is used in conjugation
D. Small piece of DNA found in mitochondria
E. DNA found only in eukaryotic cells


Ans: A. a small piece of DNA outside the chromosome

Biology & Microbiology

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Hershey and Chase tagged the DNA of viruses with radioactive phosphorus, and their protein coats with radioactive sulfur. When the viruses were allowed to infect bacteria, what did the viruses transfer to the bacteria?

A. radioactive phosphorus B. neither radioactive phosphorus nor sulfur C. radioactive phosphorus and sulfur D. radioactive sulfur

Biology & Microbiology

Which biome is characterized by an abundance of trees that lose all of their leaves at a specific time of

year? a. taiga only b. tropical rain forest only c. temperate rain forest only d. temperate deciduous forest only e. both the temperate and tropical rain forests

Biology & Microbiology

Which of the following is an organic compound?

A) adenine B) carbon dioxide C) molecular oxygen D) sodium chloride E) water

Biology & Microbiology

isolating the cell from the external environment and in maintaining homeostasis within the cell

What will be an ideal response?

Biology & Microbiology