Which of the following is a function or characteristic of initiationfactors that is common to both bacteriaand eukaryotes?
A. bring initiator tRNA to the P site on the small subunit
B. bind uncharged tRNA to aminoacyl-tRNA synthetases
C. identify the start codon
D. release stem loop structures
E. catalyze peptide bond formation
A
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Which of the following are components of Chargaff's rules of bases?
A) % purines = % pyrimidines B) %C + %T = %A + %G C) %A = %T D) %G = %C E) All of these are true.
The extracellular matrix does all of the following EXCEPT
A. helps to organize cells B. provide structural support C. provide strength D. provide an important source of energy for the organism E. contribute to cell signaling
Protein that catalyzes a specific reaction; may be found in the plasma membrane or the cytoplasm of the cell.
What will be an ideal response?
When preparing a wet-mount slide of onion cells, a student put a drop of Lugol's iodine stain was added to
a. prevent the formation of air bubbles b. make cell structures more visible c. increase the magnification d. increase the rate of photosynthesis in the cells