microbiologia

1.Cocci can be grouped into. In chains – Streptococci. In clusters – Staphylococci. In pairs – Diplococci. In tetrads – Micrococci.

2.Choose the correct association regarding the culture characters of streptococci. On nutrient agar – green pigment develops. On blood agar – develops hemolysis around the colony. On MacConkey agar – lactose fermentation. On chocolate agar – forms large mucoid colonies.

3.Streptococci. Have a cell diameter of about 0.5 microns. Are motile organisms. Have no cell wall. Are spore-forming bacteria.

4.Regarding the specific tests for the detection of group B streptococcus, the following statement is false. Agglutination is done with group A serum. CAMP test is used for identification. Hippurate hydrolysis is positive. Latex agglutination can detect group B antigen.

5.Which of the following statements are true about pneumococci?. They are motile and spore-forming. They are sensitive to optochin. They are resistant to bile solubility. They grow best at 25°C.

6.Bacteria of the same species that grew in the same place on a plate with solid culture medium, from a very small number of bacteria, called colony-forming units (CFU), represent: Biofilm. Spore. Colony. Microcolony cluster.

7.Colonies of staphylococci show the following characteristics, except: They are convex colonies. They are opaque. They are concave colonies. They have a creamy texture.

8.Influenza virus belongs to the family. Picornaviridae. Orthomyxoviridae. Adenoviridae. Retroviridae.

9.Which of the following is not an RNA virus?. Adenovirus. Measles virus. Influenza virus. Rabies virus.

10.Corynebacterium diphtheriae is a bacterium. Spiral shaped. Rod shaped with rounded ends. Spherical in shape. Coccus arranged in clusters.

11.Regarding Orthomyxoviridae family, circle the correct answer: Genome – linear negative ssRNA. Genome – circular dsDNA. Genome – segmented positive RNA. Genome – single stranded DNA.

Measles virus belongs to the family. Flaviviridae. Paramyxoviridae. Orthomyxoviridae. Retroviridae.

13.Choose the correct answer regarding Bordetella pertussis. The infection affects the gastrointestinal tract. The infection affects the upper respiratory tract. The infection affects the urinary tract. The infection affects the bloodstream.

14.α-haemolytic streptococci are also known as. Streptococcus pneumoniae. Streptococcus pyogenes. Streptococcus agalactiae. Enterococcus faecalis.

15.Following cocci are non-motile except. Staphylococcus. Streptococcus. Neisseria. Enterococcus.

16.Generally HSV-1 causes infection, except. Cold sores. Gingivostomatitis. Meningitis. Keratitis.

17.Viruses that contaminate bacteria and live inside them are called. Viroids. Bacteriophages. Oncoviruses. Prions.

18. Bacillus is an example of. Gram-negative bacteria. Gram-positive bacteria. Acid-fast bacteria. Spirochetes.

19. Regarding Herpesviruses, transcription and translation occur in 3 phases: Immediate early phase. Early phase. Late phase. All of the above.

20.The correct answer regarding the genus Haemophilus is: H. influenzae requires hemin (factor X) and NAD⁺ (factor V) for growth. H. ducreyi requires only factor V. H. parainfluenzae requires only factor X. H. aegyptius grows without any growth factors.