What is the purpose of ethidium bromide in DNA electrophoresis?
A) To tag DNA fragments so they can be viewed under UV light
B) To introduce mutations into the DNA
C) To fragment the DNA before separating the pieces by size
D) To join fragments of DNA together
A) To tag DNA fragments so they can be viewed under UV light
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In the process of bacterial transformation, how are the plasmid-containing bacteria identi?ed?
What will be an ideal response?
Which of the following is described as a spore-forming, gram-positive Bacillus that is hemolytic, motile, Voges-Proskauer (VP)–positive, and citrate-positive and causes two types of food poisoning as a result of toxin release?
a. C. diphtheria b. B. anthracis c. B. cereus d. C. jeikeium
Which of the following does a plant cell have that an animal cell does not?
a. Chromatin b. Cytoplasm c. Central vacuole d. Lysosome
Which of the following statements is true concerning how energy drinks work?
A. It is the amount of food additives in energy drinks that provides the energy felt. B. Energy drinks contain vitamins which are known to interact with cellular respiration pathways, helping provide energy. C. Energy drinks contain vast amounts of carbohydrates and proteins that enter into cellular respiration pathways, directly providing ATP energy. D. All energy drinks contain caffeine, as it is a known stimulant that increases energy levels. E. Energy drinks contain numerous vitamins and minerals which are known to directly act as stimulants.