Which of the following are morphological features of microorganisms?
A. shape and arrangement of cells
B. ability to ferment lactose
C. presence of endospores
D. ability to hydrolyze urea
E. presence and arrangement of flagella
Answer:
A. shape and arrangement of cells
B. ability to ferment lactose
C. presence of endospores
D. ability to hydrolyze urea
E. presence and arrangement of flagella
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Which of the following is smallest?
A) ribosome B) virus C) protein D) mitochondrion E) bacterium
Membranes contain several classes of lipids, such as phospholipids, sphingolipids, sterols, etc. In spite of their many differences, they all
A) are soluble in nonpolar solvents. B) can be easily hydrolyzed. C) are readily soluble in water at 37C. D) can be reduced by strong reducing agents such as sodium. E) easily react with bases but not with acids.
In eukaryotes, the electron transfer chain of
aerobic respiration is located
a. on the outer membrane of mitochondria. b. in the inner compartment of mitochondria. c. on the inner membrane of mitochondria. d. throughout the cytoplasm of the cell. e. in the outer compartment of mitochondria
Chemoautotrophs oxidize which of the following to obtain the energy necessary to reduce carbon dioxide to an organic compound?
A. ammonia B. hydrogen sulfide C. hydrogen gas D. nitrites E. All of the above.