Viruses, Rickettsia, and Chlamydia are described as obligate intracellular parasites because they can only be propagated inside living host cells. Which of the following would be appropriate for their cultivation?

A. enriched media
B. differential media
C. cell or tissue cultures
D. media that contains sheep red blood cells


Answer: C

Biology & Microbiology

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A cross is done between parents with genotypes aaBbCc and aaBbcc. What is the probability that

offspring will have the same phenotype as the first parent? Assume that capital letters indicate dominant alleles and lower case letters indicate recessive alleles.

a. 1/8 b. 1/4 c. 3/8 d. 3/16 e. 9/16

Biology & Microbiology

The origin of a muscle is the point of its attachment

A. to a bone that moves. B. on the bone that pushes the muscle. C. on the bone that is secured with only one tendon. D. to a stationary bone.

Biology & Microbiology

What maintains the secondary structure of a protein?

A) Ionic bonds B) Disulfide bonds C) Hydrogen bonds D) Peptide bonds

Biology & Microbiology

Which cellular structure is the "shipping center", responsible for packaging materials with the cell?

a) Golgi apparatus b) chloroplasts c) ribosomes d) mitochondria

Biology & Microbiology