All of the following are typical components of the plasma membrane of a eukaryotic cell except

A. Glycoproteins
B. Cytochromes
C. Cholesterol
D. Phospholipids
E. Integral proteins


Ans: B. Cytochromes

Biology & Microbiology

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The Gram-negative opportunistic rod that can grow in a wide variety of environments, including disinfectants and soaps, is

A. E. coli. B. S. aureus. C. S. pyogenes. D. P. aeruginosa.

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What is nutritional immunity?

a. acquired resistance to food-borne allergens b. withholding of nutrients necessary for pathogen replication c. the relationship between the efficacy of the immune system versus food intake d. the body’s ability to protect itself from infection by digesting pathogens

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All of the populations of different species that occupy and are adapted to a given area are known as ____

a. the biosphere b. a community c. an ecosystem d. a niche e. the habitat

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The circles in “B” are

a. fragments of the main bacterial DNA. b. plasmids. c. cDNA molecules. d. DNA templates. e. none of these.

Biology & Microbiology