Brock Biology of Microorganisms Chapter 10
Exam Questions With Correct Answers
A mutant that has a nutritional requirement for growth is an example of a(n)
A) autotroph.
B) auxotroph.
C) heterotroph.
D) organotroph. - answer✔B) auxotroph
Consider a mutation in which the change is from UAC to UAU. Both codons specify the amino
acid tyrosine. Which type of point mutation is this?
A) silent mutation
B) nonsense mutation
C) missense mutation
D) frameshift mutation - answer✔A) silent mutation
A mutation that readily reverses to restore the original parental type would most likely be due to
a(n)
A) deletion.
B) insertion.
C) point mutation.
D) frameshift mutation. - answer✔C) point mutation
Which process listed below does NOT require homologous recombination to maintain the new
genetic material in the recipient cell?
A) conjugation of an F+ plasmid
B) gene transfer through a genetic transfer agent
C) transduction by a dsDNA phage Mu
D) transformation of a linear piece of DNA - answer✔B) gene transfer through a genetic transfer
agent
The mutagens 2-aminopurine and 5-bromouracil are examples of
A) alkylating agents.
B) nucleotide base analogs.
C) chemicals reacting with DNA.
D) None of the answers are correct. - answer✔B) nucleotide base analogs
The killing of cells by UV irradiation involves
A) absorption at 260 nm by proteins only.
B) absorption at 260 nm by RNA only.
C) formation of pyrimidine dimers.
D) formation of purine dimers. - answer✔C) formation of pyrimidine dimers
Ionizing radiation does NOT include
A) gamma rays.
B) UV rays.
C) X-rays.
D) cosmic rays. - answer✔B) UV rays
Which of the following methods may introduce foreign DNA into a recipient?
A) transformation
B) transduction
C) conjugation
D) transformation, transduction, and conjugation - answer✔D) transformation, transduction, and
conjugation
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller sirjoel. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £9.17. You're not tied to anything after your purchase.
