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

Biology & Microbiology

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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

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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.

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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

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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.

Biology & Microbiology