What happens to the two original strands of a DNA molecule after the DNA has replicated?
A) Nucleotides from the original strands are randomly incorporated into the new strands.
B) Each original strand ends up paired with a newly synthesized strand.
C) Incomplete segments of the original strands end up in each newly synthesized strand.
D) After serving as replication templates, the two original strands are rejoined.
E) After serving as replication templates, the two original strands are destroyed.
Answer: B
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Which one of the following statements about cyanobacteria is false?
A) Although cyanobacteria are photosynthetic, they do not produce oxygen as a result of photosynthesis. B) At one time, cyanobacteria were called blue-green algae. C) Some cyanobacteria are capable of nitrogen fixation.
What is the evolutionary advantage of bacteria producing restriction endonucleases?
A. These enzymes are a defensive measure of bacteria to defend themselves against invading DNA of bacteriophages. B. Bacteria use these enzymes to attack other bacteria and destroy their DNA. C. They make these enzymes for humans to use in manipulating DNA. D. Bacteria use these enzymes to repair their own mistakes made during DNA replication.
Considering the increase in tick-borne diseases in the context of "One Health," which of the following statements is correct?
A. Borrelia, Babesia, and Ehrlichia can rapidly adapt to changing insect vectors, thereby increasing their populations as they move from ticks to mosquitoes. B. Ticks carrying Borrelia are likely to encounter hosts already infected with Babesia or Ehrlichia, resulting in ticks that co-infect with multiple pathogens. C. Lyme disease has spread from deer to humans upon increasing development of the forested environments usually inhabited by deer. D. Ticks carrying multiple pathogens reproduce at a slower rate, rendering them less likely to infect humans.
Homo floresiensis B) "Turkana boy"
What will be an ideal response?