Which of the following hold the chains of a T-cell receptor together?
A) disulfide bridges
B) hydrogen bonding
C) hydrophobic interactions
D) ionic bonds
A
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Compressions and rarefactions travel
A. in the same direction of the wave. B. at right angles to the wave. C. in opposite directions of the wave. D. none of the above
The universe is presently 98% hydrogen and helium. Indicate whether the statement is true or false
Which is not a likely effect of snowfall on a mountain?
A) increased weight B) decreased friction as snowmelts C) increased cohesive binding by ice crystals D) mass movement
The most common reason that dew forms is ________
A) plants give up water to the atmosphere when the temperature decreases B) fast heating of the atmosphere when the sun first comes up in the morning C) a rapid increase in water vapor in the air during the night D) radiant cooling of the ground and adjacent air in the evening