BIO 299 Exam 2 Latest Version Questions and Verified Correct Answers Guaranteed A+ A bacteriophage transfers a random fragment of DNA of the previous host to the current host. This is an example of - Correct Answergeneralized transduction
A bacterium is inoculated into a tube of nutrient broth and incubated. After incubation, it appears turbid throughout, top to bottom, with the most amount of turbidty at the very
top. This bacterium would be called a: - Correct Answerfacultative anaerobe
A loopful of bacteria containing 1000 bacterial cells is inoculated into a nutrient broth and incubated. The culture was in lag phase for 10 minutes and then went into exponential log phase growth for 5 hours. The generation time for the bacterium is 15 minutes. Which equation set up is the correct one to determine how many cells at the end of the 5 hours of log phase growth. - Correct Answer1000 X 220
A microorganism that does not have catalase or superoxide dismutase would find it difficult to live in an environment with - Correct Answeroxygen
A strain of E. coli bacteria that normally lives in the human large intestines and produce vitamin K that the body uses would be best termed a _____ relationship. - Correct Answermutualistic
After using the jelly on a sandwich, you close the jar and inadvertently place it on a room temperature shelf instead of in the refrigerator. When looking for the jelly a couple of weeks later and finding it on the shelf, you notice growth of a microorganism on the top of the jelly. What type of organism is likely to grow in this environment? - Correct Answera. a bacterium
- a protozoan
NOT c. a fungus
- a virus
An oxidase detection test can be used to identify certain bacteria because they are
missing or lack expression of: - Correct Answercytochrome C oxidase.
Analysis of DNA fragments in gel electrophoresis is based on - Correct AnswerAll of the choices are correct
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As the electron transport carriers shuttle electrons, they actively pump _____ into the outer membrane compartment, setting up a concentration gradient called the proton motive force. - Correct Answerhydrogen ions
Bacteria living in a freshwater stream that are moved to salty seawater would - Correct Answerbecome dehydrated due to the loss of water.
Bacterial conjugation involves - Correct Answera donor cell with a plasmid that synthesizes a pilus.
Below is a metabolic pathway having 3 chemical reactions and 3 enzymes. Enzyme 1 has 2 binding sites--1 for the substrate A and another for the end product D. As the pathway proceeds, the end product in higher quantities will react with enzyme 1, blocking the enzyme's binding to the substrate. Which statement is true about this pathway? Substrate A -enz1-> B -enz2-> C -enz3-> D end product - Correct AnswerAll of the statements are true
Cultures of a bacterial species were incubated on the shelf of a refrigerator (5oC), out on a lab bench top (22oC), on the shelf of a 37° C incubator, and on the shelf of a 50° C incubator. After incubation, there was no growth at 37° C and 50° C, slight growth in the refrigerator, and abundant growth on the lab bench top. What term could be used for this species? - Correct Answerpsychrotroph
DNA polymerase III - Correct Answersynthesizes new DNA only in the 5' to 3' direction
DNA strands can be clipped crosswise at selected positions by using enzymes called - Correct Answerrestriction endonucleases.
Each of the following are features of a cloning host except - Correct Answerpathogenic.
Eukaryotic chromosomes differ from prokaryotic chromosomes because only eukaryotes have - Correct AnswerAll of the choices are correct
Exergonic reactions - Correct Answeroccur during aerobic cellular respiration
Full induction of the lactose operon requires - Correct Answerlactose present without glucose
Genomic _____ are collections of isolated genes maintained in a cloning host. - Correct Answerlibraries
Human pathogens fall into the group called - Correct Answermesophiles.
If the wild type DNA sequence reads THE CAT ATE THE BIG RAT, what type of mutation would change the sequence to THE CAT ATA ETH EBI GRA T? - Correct Answerinsertion
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