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Unit 2 Bio205 Exam Guaranteed Success The structure shown below is important in the production of proteins and is responsible for bringing the amino acids to the translation complex. What is this structure? ️tRNA Which biosafety level is appropriate for research with microbes or infectious ...

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  • October 20, 2024
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Unit 2 Bio205 Exam Guaranteed Success

The structure shown below is important in the production of proteins and is responsible for bringing the
amino acids to the translation complex. What is this structure? ✔️tRNA



Which biosafety level is appropriate for research with microbes or infectious agents that pose moderate
risk to laboratory workers and the community, and are typically indigenous? ✔️BSL-2



If a population of 100,000 microbes has been treated with antimicrobials for 2 minutes and 90% of the
population dies per minute, how many microbes remain after 2 minutes? ✔️1,000



After a fun night of studying microbiology, you have 1 leftover whole pizza from your study group. What
is the best way to store this pizzato avoid growth of harmful microorganisms. ✔️immediately put
pieces of the pizza in separate containers in the refrigerator



Match the biology application to its description. ✔️bioinformatics- understanding a gene function by a
computer-aided process

proteomics-the study of how the proteins in a cell are expressed

reverse genetics- discovering gene function from a gene sequence

Southern blotting- a classical approach to detect separated DNA molecules



Match the biotechnological product with its microbe. ✔️Insulin-made mostly in E.Coli

Hepatitis B vaccine- made mostly in S.cerevisiae

Bt toxin in plants- made thru using Agrobacterium



Restriction enzymes are naturally produced by and isolated from (I) for the purpose of (II). ✔️I=bacteria
II=cutting DNA

, Detection of COVID-19 and other viruses uses a special PCR approach to detect the RNA virus. What is
the major difference between these virus tests and standard PCR? ✔️RNA is made into DNA rather
than conventional PCR which starts with DNA (double check this question again please)



If cells are grown in media containing amino acids labeled with radioactive nitrogen (15N), most of the
radioactivity will be found in the cells' ✔️DNA and proteins



Three different culture media are shown below. Which medium (or media) is/are chemically defined?
✔️A only



The structure below corresponds to which critical structure necessary to make proteins in bacteria?
✔️Ribosomes



Using the genetic code, predict what would happen to the protein sequence if a coding DNA sequence is
changed from TGG to TGA ✔️Amino acid is changed to a stop codon



What is the order of tRNA entry, removal of amino acid and exit from the translation machinery? ✔️A-
P-E



In prokaryotes, both transcriptions happen at the same time. There is no physical barrier separating the
two processes. ✔️True



When proteins are being made, in what directions is the mRNA being read and what is the length of the
nucleotides that get read in each codon? ✔️5----3 codons, 3 nucleotide



Which element in the structure of the molecule below is critical for making sure that the correct amino
acids is delivered to and added to the polypeptide in the translation complex? ✔️Codon



Three different culture media are shown below. Which medium (or media) is/are chemically defined?
✔️A only

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