Which plant group is notable for the independence of gametophyte and sporophyte generations from each other?
A) ferns
B) bryophytes
C) charophytes
D) angiosperms
E) gymnosperms
Answer: A
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Micro RNAs (miRNAs) are important in ____
a. alternative splicing b. transcriptional activation c. chromatin remodeling d. genomic imprinting e. RNA interference (RNAi)
Organisms such as lizards that need to maintain body temperature through external means do so by
A. shivering to produce heat. B. sunbathing. C. swimming in geothermal pools. D. running frequently to warm up. E. eating large meals to provide calories for heat production.
A signal peptidase
a. removes a signal sequence from a polypeptide chain after it passes through a channel into the rough ER. b. attaches a signal sequence to a growing polypeptide chain before it passes into the rough ER. c. attaches an acetyl group to the 5? end of a polypeptide after removal of the initial methionine. d. removes the initial methionine from a polypeptide chain.
The Alcosensor uses IR to measure alcohol in a person's breath.
a. true b. false