Which sentence best describes what occurs during bacterial transformation?
a. Bacteria take up pieces of DNA through infection of a virus.
b. Bacteria replicate DNA molecules.
c. Bacteria make replicate copies of one another.
d. Bacteria take up pieces of DNA that are released as other cells disintegrate.
Answer: d. Bacteria take up pieces of DNA that are released as other cells disintegrate.
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The part of the stomach designated by the letter “I”
in the above figure is called a. pyloric sphincter. b. esophagus. c. mucosa. d. duodenum. e. none of these.
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What will be an ideal response?
When a mutation occurs during DNA replication, ____ replaces the incorrect nucleotide with the correct one after the
mismatched nucleotide has been removed. a. mismatch repair enzymes b. DNA ligase c. DNA polymerase d. telomerase e. helicase
A plate inoculated with a 1:100 dilution of milk produced 30 colonies. How many organisms are in 1 ml of the undiluted sample?
A) 30 B) 300 C) 3000 D) 30000