Match the interaction or bond on the left with the phrase that best describes it on the right
A) electrostatic interactions
B) transient interactions at very close range
C) sharing of electrons
D) association of nonpolar groups
E) noncovalent attraction among water molecules
1) hydrogen bond
2) ionic bonds
3) van der Waals interactions
4) hydrophobic interaction
5) covalent bonding
Answers: 1) E 2) A 3) B 4) D 5) C
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An individual who is attracted to light is exhibiting
(a) negative phototaxis. (b) positive phototaxis. (c) negative thigmotaxis. (d) positive thigmotaxis.
The nitrogen found in carnivores would follow which of the following paths?
A. plant ® air ® carnivore B. herbivore ® plant ® air ® carnivore C. air ® bacteria ® plant ® herbivore ® carnivore D. air ® plant ® bacteria ® herbivore ® carnivore
You have joined a lab studying DNA replication in E. coli. The graduate student you are working with has identified a mutation in primase that makes primase very inefficient. Your project is to characterize the cells with this mutation. Predict the defects you would most likely see in the mutant E. coli cells.
A. inefficient Okazaki fragment joining B. a longer total time to replicate DNA C. a delay in the unwinding of DNA D. a delay in DNA polymerase beginning synthesis E. rapid lagging-strand synthesis but slow leading-strand synthesis
If one compares the base sequences of related genes from different species, one is likely to find that corresponding ________ are usually conserved, but the sequences of ________ are much less well conserved
A) exons; introns B) introns; exons C) introns; proteins D) chaperons; exons E) introns; chaperons