The PAS reaction will demonstrate fungi, because the cell wall contains:

a) lipids
b) carbohydrates
c) reducing substances
d) argyrophilic protein


Ans: b) carbohydrates

Biology & Microbiology

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At present, the most accurate indicator of evolutionary relatedness among organisms is the

A. size of the periplasmic space. B. sequence of the ribosomal small subunit RNA. C. size of the bacterial chromosome. D. similarities of cell membrane proteins. E. size of the ribosomes.

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Mammals are thought to be living descendants of ____

a. anapsids b. archosaurs c. lepidosaurs d. synapsids e. diapsids

Biology & Microbiology

Which term refers to muscles that are attached to bones and cause bones to move at their joints when they contract?

A. Skeletal muscle B. Involuntary muscle C. Cardiac muscle D. Smooth muscle E. Ligament muscle

Biology & Microbiology

Which hormone is used to promote ripening of fruit that has been picked green?

1.auxins 2.cytokinins 3.ethylene 4.gibberellins

Biology & Microbiology