Tyrosine-tRNA synthetase belongs to which group of enzymes?
A) hydrolases
B) ligases
C) oxidoreductases
D) transferases
B
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Light or moderate-but-steady precipitation is most often associated with __________ clouds
a. nimbostratus b. cirrostratus c. cirrocumulus d. cumulonimbus
As a plate moves over the hot spot, the volcano moves off and dies, and a new volcano forms over the hot spot. This process generates:
a. volcano islands b. volcano acres c. independent volcanos d. hot-spot track
Scientists have subdivided the upper mantle into three sections based on environmental and compositional differences. What are these three subdivisions and how do they compare to each other?
What will be an ideal response?
Toxic substances are dangerous because they
A. Can physically remove or tear tissues B. Cause excessive water accumulation in tissues C. Are usually synthetic D. React or interfere with specific cell functions E. Cause debilitating parasitic diseases