In the primary stage of syphilis, the initial symptom is a small, painless, reddened ulcer called a ________.

Fill in the blank(s) with the appropriate word(s).


chancre

Biology & Microbiology

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Which of the following must bring in a virion-associated RNA-dependent RNA polymerase when it infects host cells?

A. +ssRNA viruses B. -ssRNA viruses C. All of the choices are correct. D. +dsRNA viruses

Biology & Microbiology

Fats that your body cannot make are called____

a. essential fatty acids b. triglycerides c. phospholipids d. saturated fats e. sterols

Biology & Microbiology

Transgenic organisms are used to aid studies of:

a. genetic diseases. b. gene expression. c. immune system function. d. viral diseases. e. genes involved in cancer development.

Biology & Microbiology

Fertilized chicken eggs are used to culture some vaccine strains.

Answer the following statement true (T) or false (F)

Biology & Microbiology