When laser tweezers are used, the laser beam traps
A) isolated single-copy genomes.
B) a single microbial cell.
C) a single microbial colony on a plate.
D) multiple cells of the same type.
Answer: B
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Organelles like the endoplasmic reticulum
most likely arose by a process most closely related to
a. endosymbiosis. b. endocytosis. c. exocytosis. d. cell fractionation. e. binary fission
How would you best follow the timing of expression of a given protein during development in a live animal?
A) in situ hybridization B) RT-PCR C) using a transgenic organism that expresses a GFP fusion protein D) microarray analysis E) using antibodies against the protein of interest
DNA barcoding:
A: is a type of reverse genetics. B: is the most commonly used type of DNA fingerprinting used by the FBI. C: attempts to provide a unique sequence identifier for all life forms. D: is based mainly on repetitive DNA. E: is used for prenatal genetic screening.
A ________ species is fundamentally essential to an ecosystem; its loss changes the structure of the entire community, even though it may only represent a small portion of the population
A) rivet B) keystone C) redundant D) footprint E) baseline