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BIOL 1104 Lecture Chapter 15 Study Guide (Exam 1) Questions With Complete Solutions
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BIOL 1104 Lecture Chapter 15 Study Guide (Exam 1)Questions With Complete Solutions
A(n) ___________ drug is defined as a substance that kills
bacteria. Most of these bacteria are produced by microbes
themselves as a defense mechanism to outcompete other
microbes. Correct Answer antibiotic
Although the term probiotic therapy sounds like a drug
treatment, it involves the introduction of live bacteria into the
body to provide competition for potential pathogens looking to
enter. In this context, why is competition a good thing? Correct
Answer it's a good thing because the live bacteria replicate at
such a fast rate that it interferes with the growth of bad bacteria
Animal-Like Protist Correct Answer - Have flagella
- hunt for prey
-Ex: paramecium
Bacterial resistance to antibiotics is conferred by the presence of
specific genes either on the bacterial chromosome or on a
resistance plasmid. These genes produce proteins that have the
ability to limit the effectiveness of the antibiotic in one of three
ways: Correct Answer 1. some bacteria pump an antibiotic out
of cells as fast as it enters so it never reaches a lethal
concentration inside the bacterial cell
2. bacteria block its lethal effect with proteins that bind to
antibiotic molecule
, 3. bacteria have enzymes that break down antibiotic molecule
and use components as fuel for faster growth and division
Binary fission is a form of ___________ gene transfer. Correct
Answer vertical
Contrast the differences between each type of trophic category
in bacteria:
Chemoorganotrophs
Chemolithotrophs
Photoautotrophs Correct Answer Chemoorganotrophs:
consume organic molecules like carbohydrates
Chemolithotrophs: feed on inorganic molecules
Photoautotrophs: use energy from sun to produce glucose via
photosynthesis
Define a plasmid. Correct Answer A circular molecule of DNA
that carry genes for SPECIFIC functions
Define binary fission. Correct Answer division of a cell into
two genetically identical cells; asexual reproduction
Define horizontal gene transfer Correct Answer transfer of
DNA that:
1. DOES NOT occur from parent to child
2. can occur between the environment and the organims
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