Formation of biofilms attached to fibronectin and fibrinogen coating plastic devices like catheters and heart valves is a virulence mechanism of

A.
Staphylococcus.

B.
Streptococcus.

C.
Clostridium.

D.
Pseudomonas.


A.

Biology & Microbiology

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Thiobacillus species are acidophilic chemolithotrophs capable of autotrophic growth. They perform the dissimilative oxidation of H2S, So, thiosulfate, or Fe+2

Diagram or explain how Thiobacillus species obtain carbon and energy for growth and predict what type of environment they would be found in. What will be an ideal response?

Biology & Microbiology

Which of the following is NOT important for the adherence of bacteria to other bacteria as well as to host tissue?

A) adherence polymers B) capsule C) glycocalyx D) slime layer

Biology & Microbiology

Which maternal serum marker pattern indicates increased risk of Down syndrome in a fetus?

A) Deficient hCG and inhibin A and elevated AFP, estradiol, and pregnancy-associated plasma protein A Progesterone and testosterone B) Elevated hCG, inhibin A, AFP, estradiol, and pregnancy-associated plasma protein C) Deficient hCG, inhibin A, AFP, estradiol, and pregnancy-associated plasma protein D) Elevated hCG and inhibin A and deficient AFP, estradiol, and pregnancy-associated plasma protein A

Biology & Microbiology

A fertilized egg is called a(n)

A. blastocyst. B. oocyte. C. zygote. D. ovule.

Biology & Microbiology