What recognizes the nonsense codon and triggers termination at the end of translation?
a. tRNAs coded for termination
b. small ribosomal subunit
c. protein release factors
d. large ribosomal subunit
c. protein release factors
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Formation of biofilms attached to fibronectin and fibrinogen coating plastic devices like catheters and heart valves is a virulence mechanism of
A. Staphylococcus. B. Streptococcus. C. Clostridium. D. Pseudomonas.
Matthew has the inherited form of the eye cancer retinoblastoma (RB). His disease is caused by
A) a germline mutation in one RB allele and no mutation in the other allele. B) a somatic mutation in each copy of the RB gene in the same cell. C) a germline mutation in one RB allele and a somatic mutation in the other allele. D) a somatic mutation in one of the RB genes in the same area of the retina of one eye.
During G2, a cell produces ________
a. daughter cells b. the bipolar spindle c. proteins that drive mitosis d. newly synthesized DNA
Which of the following is NOT unique to
angiosperms?
a. endosperm b. a cell within the female gametophyte that has two nuclei c. pollen tubes d. double fertilization e. more than one of these is NOT unique to angiosperms