Tag Archives: DAT

Amoeboid Organisms

The group of organisms that are amoeboid and exhibit a slug stage are:

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Intelligent Doodles

A friend of yours draws a circle circumscribing a regular octagon. What is the ratio of the area of the octagon to the circle?

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Zero Dipole Moment

Which conformation of 1,2-dichloroethane has a zero dipole moment?

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The Forces Responsible

The forces responsible for the relatively high melting point and boiling point of water, H2O, are:

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Mystery Compound

A reagent bottle with the label “brominated benzene” shows two peaks in the carbon NMR spectrum. Which of the following are possible structures for the mystery compound?

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Cell Functions

Glycosylation, sulfation and phosphorylation (of proteins) represent functions of which cell organelle?

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Population Growth

Which of the following would be best to use for population growth with known upper limit?

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3-methyl-2-butanol

Which of the following compounds gives 3-methyl-2-butanol upon reduction with LiAlH4?

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Exchange Genetic Information

During what stage of meiosis do homologous chromosomes exchange genetic information?

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Effectiveness of Hand Wash

Bacteria such as V. cholerae are known to follow an exponential growth curve rate, and will double their number every 15 minutes. Fortunately, anti-bacterial hand wash can kill 99.9% of bacteria on a surface. If a colony of 500 V. cholerae cells are left alone for 2 hours, then anti-bacterial handwash is applied thoroughly, how many bacterial cells are left?

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