Which of the following is considered a model for enzyme action?
A. Lock and Key model
B. Enzyme interaction model
C. Transformation model
D. Transcription model
Ans: A. Lock and Key model
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Which feature is found in sponges that classify them as animals? a. Organs b. Symmetry c. None of these features are found in sponges
d. Heterotrophs e. Tissues
The soil-forming process occurring in cool, moist climates of midlatitude regions where coniferous vegetation dominates is referred to as
A) laterization. B) podzolization. C) gleization. D) calcification.
Genetic drift may lead to
A) loss of genetic variation in a population. B) a decrease in the mutation rate of a particular gene. C) increased heterozygosity at many loci. D) Hardy-Weinberg equilibrium. E) All of these
Packaging of prokaryotic chromosomes
A) doesn't involve histone or histone-like proteins. B) involves large regions of positively supercoiled DNA but lacks histones or histone-like proteins. C) is very simple and lacks higher-level structure, such as looped domains. D) involves structural RNA molecules that contribute to the formation of looped domains. is essentially the same as eukaryotic DNA packaging.