It used to be thought that streptococci were the primary bacteria in dental plaque. What do we now know about the composition of dental plaque and how do we know it?

What will be an idial response.


Answer: Streptococci is the primary bacteria in dental plaque. Dental plaque is a bio film. Else it can be explained as bacterial growth on surface of teeth. The bacteria form a bio film.

Bacteria along with macrophages, lymphocytes, leukocytes and neutrophils combines to form plaque. The group of micro organisms that form the bio film that discussed earlier are streptococcus and many other anaerobes. They are the primary bacteria which starts the colonies on the tooth surface. If these are left unnoticed without proper brushing they will grow in thick layer.

Biology & Microbiology

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Indicate whether the following statements are true or false. ____ All animals have a nervous system. ____ All animals sense and respond to the environment. ____ It is necessary to have a nervous system to sense and respond to the environment

What will be an ideal response?

Biology & Microbiology

When a ________ enters a host cell, it loses the outermost protein layer and is then referred to by virologists as a double-layered particle (DLP).

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

Biology & Microbiology

The macromolecule containing alternating N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) chains cross-linked by short peptide fragments is ________.

A. teichoic acid B. mycolic acid C. lysozyme D. lipopolysaccharide E. peptidoglycan

Biology & Microbiology

The pelvic organs receive blood from the ____

a. hepatic veins b. iliac arteries c. femoral arteries d. pulmonary arteries e. pulmonary veins

Biology & Microbiology