What type of charge do histones tend to carry?
a. a mixture of positive and negative charges
b. no charge
c. a negative charge
d. a positive charge
Ans: d. a positive charge
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In Drosophila, the sex of an individual is determined by
A. 1 pair of alleles. B. the number of X chromosomes. C. the number of Y chromosomes. D. 1 pair of autosomes. E. 2 pairs of alleles.
The LexA protein is:
A. the repressor of the SOS response. B. the coprotease for the cleavage of RecA protein. C. a DNA repair enzyme. D. a regulatory protein for the lac operon.
You can be outside on an day where the air temperature is 85oF for hours without getting cold. However, you will get cold in 85oF water before too long unless you are very active. This difference is due to higher heat _____ in water relative to air.
A. radiation B. conduction C. convection D. evaporation E. transpiration
This apparatus was used in the primitive Earth
atmosphere simulation experiments performed by a. Stanley Miller. b. Thomas Brock. c. Australian researchers. d. Jeon Kwang. e. Lynn Margulis.