Two suspensions containing two different phages were accidentally mixed, and then a single drop of the mixed suspension was placed onto an agar plated swabbed with bacteria. If, after 24 hours a plaque appeared, could you use that data to determine what strain the bacteria belong to?

A) Yes, you could assume both phages helped make the plaque.
B) No, you wouldn’t know which phage caused the plaque.


B) No, you wouldn’t know which phage caused the plaque.

Biology & Microbiology

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Answer the following statements true (T) or false (F)

1. Restriction enzymes bind to specific sequences of DNA to seal them together. 2. Most plasmids used in biotechnology contain a selectable marker such as an antibiotic-resistance (ampR) gene. 3. A DNA library is known as a genomic library when it is derived from mRNA. 4. If a large protein is run on a gel slab and subjected to electrophoresis, one would expect to find its band towards the top of the gel.

Biology & Microbiology

To control pathogenic and disease-causing organisms, spices can be fumigated using ________.

A. ammonium gas B. chlorine gas C. heavy metals D. ethylene oxide

Biology & Microbiology

Which of the following is endergonic?

A) the burning of wood B) breaking bonds in starch to produce glucose C) the digestion of proteins in the stomach D) cells breaking down glucose into CO2 E) the synthesis of glucose from carbon dioxide and water

Biology & Microbiology

The chromogenic media that you will be using is used specifically for

A) The isolation and differentiation of urinary tract pathogens. B) The isolation and differentiation of respiratory tract pathogens. C) The isolation and differentiation of pathogens that cause skin and eye infections. D) The isolation and differentiation of pathogens that cause digestive system infections.

Biology & Microbiology