In all organisms, active transport across a membrane requires
A) equal concentrations of ions on both sides of the membrane.
B) a resting potential of 0 mV.
C) exergonic movement indicated by the direction of the electrochemical potential.
D) an asymmetric distribution of ions across a membrane.
E) both choices B and D
D) an asymmetric distribution of ions across a membrane.
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Which of the following characteristics of protein degradation in eukaryotic cells is not true of protein degradation in bacterial cells?
A. Proteins with an Arg residue at their N-termini have short half-lives. B. Proteins are degraded by a large, barrel-shaped protease. C. Proteolysis is ATP dependent in regulated protein degradation. D. Protein degradation is directed by the covalent attachment of ubiquitin.
Glyceraldehyde-3-phosphate is an intermediary of glycolysis that can also be utilized in biosynthetic pathways.
Answer the following statement true (T) or false (F)
Parasitic and scavenger fish
A) sharks and rays B) lamprey and hagfish C) bony fish D) coelacanths
Which structure in the human body will use flagella to move?
A. lining of the urinary system B. lining of the respiratory tract C. eggs D. sperm E. lining of the uterine tubes