The appearance of gram-negative bacteria after completing the Gram stain.
a. Purple
b. Red
c. Colorless
d. Brown
Ans: b. Red
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Which of the following is NOT true of the plasma membrane?
A. It is composed of an extracellular and intracellular layer of phospholipids. B. The extracellular and intracellular layers or leaflets are highly symmetrical. C. The membrane contains peripheral proteins. D. Integral proteins span through the membrane. E. The membrane contains glycolipids and glycoproteins.
One of the ways agricultural production of such fruits as tomatoes or cucumbers can be increased significantly is to grow them in:
A. soils rich in magnesium B. soils rich in nitrogen C. greenhouses supplied with extra carbon dioxide D. greenhouses with extra oxygen E. None of these is true
Genes for specific traits (e.g., hair color) are located at specific spots on a chromosome. Is it possible for a maternal allele for blonde hair to be switched to the paternal chromosome of the homologous pair during meiosis?
What will be an ideal response?
Which structures have the same length, shape, and centromere location?
A. Karyotypes B. Histones C. Bacteriophages D. Nucleosomes E. Autosome pairs