The difference in lipid and protein composition between the membranes of the endomembrane system is largely determined by the _____
A) transportation of membrane lipids among the membranes of the endomembrane system by small membrane vesicles
B) function of the Golgi apparatus in sorting and directing membrane components
C) modification of the membrane components once they reach their final destination
D) synthesis of different lipids and proteins in each of the organelles of the endomembrane system
B
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The molecule in the accompanying figure is a(n) ____
a. triglyceride b. amino acid c. steroid d. polysaccharide e. phospholipid
The process of linking the correct amino acid to a tRNA molecule is catalyzed by ____
a. the tRNA itself b. RNA polymerase c. an mRNA d. the ribosome e. an aminoacyl-tRNA synthetase
When a molecule cannot dissolve readily in water is can be described as which of the following?
a. polar b. hydrophobic c. a solvent d. hydrophilic
Which of the following is the proper sequence of events in gene expression?
A) DNA ? mRNA ? protein B) DNA ? protein ? mRNA C) protein ? DNA ? mRNA D) mRNA ? DNA ? protein