What substance is required for membrane trafficking to occur?

a. Lipids
b. Oxygen
c. Sodium
d. Hydrogen
e. ATP


e

Biology & Microbiology

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A phospholipid molecule has a polar and a nonpolar end. Because of this, water molecules form  

A.  polar bonds with the nonpolar end of the phospholipid molecule. B.  polar bonds with the polar end of the phospholipid molecule. C.  hydrogen bonds with the nonpolar end of the phospholipid molecule. D.  hydrogen bonds with the polar end of the phospholipid molecule. E.  covalent bonds with the nonpolar end of the phospholipid molecule.

Biology & Microbiology

Santhi Soundarajan won a silver metal in the 2006

Pan Asian Games. Why did she later have her metals recalled? a. She was a cross-dresser who pretended to be female. b. She was a female who had a Y chromosome without knowing about the genetic condition. c. She used performance enhancing drugs that altered her genetic structure. d. She was genetically altered at birth to create a faster runner. e. Her government gave her a sex change in order to hide the fact that she was really a male.

Biology & Microbiology

If the mitochondrion is the result of endosymbiosis, what membrane of the mitochondrion represents the engulfing vesicle?

A. matrix B. cristae C. the outer mitochondrial membrane D. grana E. vacuole

Biology & Microbiology

Around hydrothermal vents at depths of more than 2,500 m, scientists have found colonies of giant tube-dwelling worms. The worms contain symbiotic prokaryotes that are able to use hydrogen sulfide as an energy source for the synthesis of organic matter from carbon dioxide. The bacteria are _____.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology