Which one of the following statements is INCORRECT?

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#Question id: 12378

#Unit 10. Ecological Principles

Primary succession is occurring.

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#Question id: 14961

#Unit 8. Inheritance Biology

Drosophila females are capable of storing sperm and using it to fertilize eggs long after mating. How might this present a problem for a geneticist?

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#Question id: 19103

#Unit 6. System Physiology – Plant

During infection, most bacteria remain in extracellular spaces and use a specialized mechanism, to deliver bacterial effector proteins into the plant cell that is

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#Question id: 16126

#Unit 13. Methods in Biology

2 You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS, that could explain the effect of the gln2– and gln3– mutations on the regulation of GLN1.

The GLN1 gene shows a rather complex regulation in response to different amino acids. When either glutamate (glu) or glutamine (gln) is added to the medium, the amount of GS expression diminished and when both glutamate and glutamine are added to the medium GS expression is shut off completely. The effects of different mutants on the response to glu and gln are shown below.

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#Question id: 23781

#Unit 7. System Physiology – Animal

Rhodopsin is comprised of 

a. An ketone of vitamin A

b. Opsin protein (GPCR)

c. An aldehyde of vitamin A

d. Retinal