ORF refers to ________.
A. the region of a gene that codes for a protein or a functional RNA product
B. the region between the ribosome binding site and translation initiation codon
C. the location of the start site of transcription
D. the region of a gene that serves as the promoter
Answer: A
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Lichens are
a. parasitic interactions between a fungus and an alga. b. only found growing on living matter. c. symbiotic associations between a fungus and an alga. d. capable of causing some obscure diseases. e. insensitive to changes in the environment.
Red blood cells are biconcave. Their shape is determined by interior proteins anchored to the membrane termed
A. phospholipids. B. clathrins. C. actin filaments. D. cytoskeleton. E. spectrins.
All chordates have
A) a post-anal tail. B) a backbone. C) a bony endoskeleton. D) a ventral, hollow nerve cord. E) gills.
The notochord
A) becomes the brain. B) is for muscle attachment. C) becomes the digestive system. D) develops from the pharyngeal gill slits. E) forms the nerve cord in an adult.