The crescent-shaped structure of PUF proteins reveals two extended surfaces. Based on the location and effects ofmutations, one surface probably binds to regulatory proteins and the other surface probably binds to:
A. ribosomal proteins increasing the association of ribosomes to the 5' end of the ribosome tRNA binding site.
B. specific sequences in the 3' UTR of mRNA.
C. the nuclearAAUAAA polyadenylation sequence.
D. the peptidyl (P) site on the 40Sribosomal subunit.
B
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The most common mode of transmission for sinusitis is ________.
A. direct contact B. endogenous infection C. droplet contact D. indirect contact E. exotoxin
Four of the five choices listed below are
characteristics of phloem. Select the exception. a. consists only of cell walls b. characterized by channels across plant cell walls c. sieve plates found between some cells d. includes accessory companion cells e. transports sugar
A cell that has 36 chromosomes at the start of interphase will have __________ following the conclusion of mitosis in a eukaryote
(A) 18 replication chromosomes (B) 36 single-stranded chromosomes (C) 72 single-stranded chromosomes (D) 18 single-stranded chromosomes
Cells with a relatively simple cell morphology that do not have a true membrane-delimited nucleus are called ________.
A. urkaryotes B. prokaryotes C. nokaryotes D. eukaryotes