A nucleosome consists of
A. a stretch of DNA.
B. an RNA molecule.
C. a ribosome and RNA.
D. a stretch of DNA and histones.
E. two or more closely related genes.
D. a stretch of DNA and histones.
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The iron meteorites
a. never fall on the Earth. b. are only found in the Antarctic. c. are composed of carbonaceous chondrites. d. are responsible for most of the meteor craters on the surface of the moon. e. appear to have formed in the interiors of molten planetesimals.
When does translation begin?
a. when a tRNA anticodon recognizes an mRNA codon b. when a polypeptide chain is formed c. when a ribosome accepts charged tRNAs d. when an uncharged tRNA departs the complex
All known living things have the same ___code
Fill in the blank(s) with the appropriate word(s).
Which of the following represents the correct order of adult human teeth, beginning at the front and moving right along the bottom jaw?
A. Incisors, canines, premolars, molars B. Incisors, molars, canines, premolars C. Incisors, premolars, molars, canines D. Incisors, canines, molars, premolars E. Canines, incisors, premolars, molars