Profilin does all of the following except
A) competes with thymosin ?4 for binding to actin monomers.
B) sequesters actin monomers to prevent any polymerization.
C) binds to formin in order to "stage" actin monomers for addition to a growing filament.
D) promotes actin monomer addition to a filament plus end.
E) Profilin does all of the above.
Answer: B
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It is your task to prove the chromosomal theory of inheritance in your cell biology class. Your task is limited by examining only one trait in Drosophila. You may use the tools of modern biotechnology to aid you in your progress. Which of the following would be least likely to help you in your endeavor?
A) examining a trait that is the genotype AA in all of the available parental stocks B) examining a trait that is the genotype AA or aa in all of the available parental stocks C) DNA sequence analysis D) protein sequencing E) genetic manipulation to add a marker to a particular chromosome in the germline
Corneal implants have been implicated in a few cases of
A. botulism. B. trypanosomiasis. C. Creutzfeldt-Jakob. D. scrapie.
This phylum of nonvascular plants has about 6000 known living species. It includes the genus
Marchantia, whose members can reproduce asexually via cups called gemmae.
a. Hepatophyta b. Pterophyta c. Bryophyta d. Lycophyta e. Anthocerophyta
What actually happens when pyruvic acid loses a carbon dioxide molecule after glycolysis?
A) The pyruvic acid is denatured. B) The pyruvic acid is phosphorylated. C) The pyruvic acid is decarboxylated. D) The pyruvic acid is oxidated.