Gram Negative Cocci Test - Sexually Transmitted Diseases

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| By Catherine Halcomb
Catherine Halcomb
Community Contributor
Quizzes Created: 1429 | Total Attempts: 6,058,033
Questions: 18 | Attempts: 299

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Gram Negative Cocci Test - Sexually Transmitted Diseases - Quiz

Medically and scientifically relevant gram-negative cocci include the four types that cause a sexually transmitted disease (Neisseria gonorrhoeae), a meningitis (Neisseria meningitidis), and respiratory symptoms (Moraxella catarrhalis, Haemophilus influenza). This is a test about Sexually transmitted diseases and Gram Negative Cocci to see how much you know and learn more!


Questions and Answers
  • 1. 

    Which species of Neisseria are considered ROD-SHAPED?

    • A.

      N. elongata

    • B.

      N. weaveri

    • C.

      N. bacilliformis

    • D.

      N gonorrhoeae

    • E.

      N. meningitidis

    • F.

      N. mucosa

    • G.

      N. lactamica

    Correct Answer(s)
    A. N. elongata
    B. N. weaveri
    C. N. bacilliformis
    Explanation
    N. elongata, N. weaveri, and N. bacilliformis are considered rod-shaped species of Neisseria because they have a long and cylindrical shape, resembling a rod or a bacillus. This is in contrast to other species of Neisseria, such as N. gonorrhoeae, N. meningitidis, N. mucosa, and N. lactamica, which have a more spherical or coccus shape.

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  • 2. 

    This is an opportunistic pathogen and is the 3rd most common cause of otitis media and sinusitis in children

    Correct Answer(s)
    Moraxella catarrhalis
    Explanation
    Moraxella catarrhalis is a bacterium that is known to cause infections in the respiratory tract, particularly in children. It is considered an opportunistic pathogen, meaning it takes advantage of weakened immune systems or other factors to cause infection. Otitis media, an infection of the middle ear, and sinusitis, an infection of the sinuses, are two common conditions that Moraxella catarrhalis can cause. It is the third most common cause of these infections in children, highlighting its significance in pediatric respiratory infections.

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  • 3. 

    The reagent in the superoxol test

    • A.

      30% hydrogen peroxide

    • B.

      3% hydrogen peroxide

    • C.

      13% hydrogen peroxide

    • D.

      0.03% hydrogen peroxide

    Correct Answer
    A. 30% hydrogen peroxide
    Explanation
    The correct answer is 30% hydrogen peroxide because the superoxol test requires a strong oxidizing agent, and 30% hydrogen peroxide fits this criteria. The other options, 3%, 13%, and 0.03% hydrogen peroxide, are not strong enough to be used as a reagent in the superoxol test.

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  • 4. 

    Culture media used for Carbohydrate Utilization Test

    • A.

      Trypticase Soy Agar with 10% of a specific carbohydrate

    • B.

      Cystine Trypticase Agar (CTA) with 1% of a specific carbohydrate

    • C.

      Cysteine Tellurite Agar with 1% of a specific carbohydrate

    Correct Answer
    B. Cystine Trypticase Agar (CTA) with 1% of a specific carbohydrate
    Explanation
    The correct answer is Cystine Trypticase Agar (CTA) with 1% of a specific carbohydrate. This is because CTA is a selective and differential medium that allows for the differentiation of bacteria based on their ability to utilize specific carbohydrates. The addition of 1% of a specific carbohydrate provides the necessary substrate for bacterial growth and allows for the observation of carbohydrate utilization patterns.

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  • 5. 

    Carbohydrate/s that N. gonorrhoea can utilize

    • A.

      Glucose

    • B.

      Maltose

    • C.

      Sucrose

    • D.

      Lactose

    • E.

      Fructose

    • F.

      None of the above

    Correct Answer
    A. Glucose
    Explanation
    N. gonorrhoea is a bacteria that can utilize glucose as a carbohydrate source. This means that it can metabolize glucose to obtain energy for its growth and survival. The other carbohydrates listed (maltose, sucrose, lactose, fructose) are not mentioned as being utilized by N. gonorrhoea, so they are not the correct answer.

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  • 6. 

    Carbohydrate/s that N. meningitidis can utilize

    • A.

      Glucose

    • B.

      Maltose

    • C.

      Sucrose

    • D.

      Lactose

    • E.

      Fructose

    • F.

      None of the above

    Correct Answer(s)
    A. Glucose
    B. Maltose
    Explanation
    N. meningitidis is a bacterium that can utilize glucose and maltose as carbohydrates. This means that it can break down and use these sugars as a source of energy for its metabolic processes. Sucrose, lactose, and fructose are not listed as carbohydrates that N. meningitidis can utilize, so they are not the correct answer. Therefore, the correct answer is glucose and maltose.

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  • 7. 

    Carbohydrate/s that N. lactamica can utilize

    • A.

      Glucose

    • B.

      Maltose

    • C.

      Sucrose

    • D.

      Lactose

    • E.

      Fructose

    • F.

      None of the above

    Correct Answer(s)
    A. Glucose
    B. Maltose
    D. Lactose
    Explanation
    The correct answer is Glucose, Maltose, Lactose. N. lactamica is capable of utilizing these carbohydrates as a source of energy. This means that the bacteria can break down and metabolize these sugars to produce ATP, which is the energy currency of cells. Sucrose and Fructose are not mentioned as carbohydrates that N. lactamica can utilize, so they are not included in the correct answer.

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  • 8. 

    Carbohydrate/s that N. cinerea can utilize

    • A.

      Glucose

    • B.

      Maltose

    • C.

      Sucrose

    • D.

      Lactose

    • E.

      Fructose

    • F.

      None of the above

    Correct Answer
    A. Glucose
    Explanation
    N. cinerea is able to utilize glucose as a carbohydrate source. This means that the organism can break down and use glucose as an energy source for its metabolic processes. The other carbohydrates listed (maltose, sucrose, lactose, fructose) may or may not be utilized by N. cinerea, but the given answer specifically states that glucose is a carbohydrate that N. cinerea can utilize.

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  • 9. 

    Carbohydrate/s that N. sicca can utilize

    • A.

      Glucose

    • B.

      Maltose

    • C.

      Sucrose

    • D.

      Lactose

    • E.

      Fructose

    • F.

      None of the above

    Correct Answer(s)
    A. Glucose
    B. Maltose
    C. Sucrose
    E. Fructose
    Explanation
    N. sicca is able to utilize glucose, maltose, sucrose, and fructose as carbohydrates. This means that the organism has the necessary enzymes to break down these specific carbohydrates and use them as a source of energy. It cannot utilize lactose, as lactose requires the enzyme lactase to be broken down, which N. sicca does not possess.

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  • 10. 

    Carbohydrate/s that N. flavencens can utilize

    • A.

      Glucose

    • B.

      Maltose

    • C.

      Sucrose

    • D.

      Lactose

    • E.

      Fructose

    • F.

      None of the above

    Correct Answer
    F. None of the above
    Explanation
    The correct answer is "None of the above" because N. flavencens cannot utilize any of the listed carbohydrates. This means that the bacterium is unable to break down and use glucose, maltose, sucrose, lactose, or fructose as a source of energy or carbon.

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  • 11. 

    Which species of Neisseria would test positive in the Catalase test?

    • A.

      N. flavencens

    • B.

      N. sicca

    • C.

      N gonorrhoeae

    • D.

      N. meningitidis

    • E.

      N. cinerea

    • F.

      N. lactamica

    • G.

      N. weaveri

    Correct Answer(s)
    A. N. flavencens
    B. N. sicca
    C. N gonorrhoeae
    D. N. meningitidis
    E. N. cinerea
    F. N. lactamica
    G. N. weaveri
    Explanation
    All species of Neisseria would test positive in the Catalase test.

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  • 12. 

    Which species of Neisseria would grow in Martin-Lewis agar, modified Thayer-Martin agar and New York City medium

    • A.

      N. flavencens

    • B.

      N. sicca

    • C.

      N gonorrhoeae

    • D.

      N. meningitidis

    • E.

      N. cinerea

    • F.

      N. lactamica

    Correct Answer(s)
    C. N gonorrhoeae
    D. N. meningitidis
    E. N. cinerea
    F. N. lactamica
    Explanation
    The species of Neisseria that would grow in Martin-Lewis agar, modified Thayer-Martin agar, and New York City medium are N. gonorrhoeae, N. meningitidis, N. cinerea, and N. lactamica. These agar and medium types are specifically designed to support the growth of Neisseria species, particularly those that are pathogenic to humans. N. flavencens and N. sicca are not typically associated with human infection and may not grow well on these specific types of agar and medium.

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  • 13. 

    Which species of Neisseria would grow in the Nutrient Medium at 35 degrees

    • A.

      N. flavencens

    • B.

      N. sicca

    • C.

      N gonorrhoeae

    • D.

      N. meningitidis

    • E.

      N. cinerea

    • F.

      N. lactamica

    Correct Answer(s)
    A. N. flavencens
    B. N. sicca
    E. N. cinerea
    F. N. lactamica
    Explanation
    N. flavencens, N. sicca, N. cinerea, and N. lactamica would grow in the Nutrient Medium at 35 degrees. This is because these species of Neisseria are capable of growing and thriving in the specific conditions provided by the Nutrient Medium at 35 degrees. N. gonorrhoeae and N. meningitidis are not included in the answer because they may have different growth requirements or may not be able to survive at 35 degrees.

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  • 14. 

    Which species of Neisseria would produce β-D-Galactosidase

    • A.

      N. flavencens

    • B.

      N. sicca

    • C.

      N gonorrhoeae

    • D.

      N. meningitidis

    • E.

      N. cinerea

    • F.

      N. lactamica

    Correct Answer
    F. N. lactamica
    Explanation
    N. lactamica is the correct answer because it is the species of Neisseria that produces β-D-Galactosidase. This enzyme is responsible for breaking down the disaccharide lactose into its component monosaccharides, glucose, and galactose. The other species listed do not produce this enzyme.

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  • 15. 

    Which species of Neisseria would produce gamma-glutamylaminopeptidase

    • A.

      N. flavencens

    • B.

      N. sicca

    • C.

      N gonorrhoeae

    • D.

      N. meningitidis

    • E.

      N. cinerea

    • F.

      N. lactamica

    Correct Answer
    D. N. meningitidis
    Explanation
    N. meningitidis is the correct answer because it is known to produce gamma-glutamylaminopeptidase. This enzyme is involved in the breakdown of peptides and plays a role in the metabolism of Neisseria species. N. meningitidis is a bacterium that can cause meningitis and other infections, and its ability to produce this enzyme is one of its distinguishing characteristics.

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  • 16. 

    Which species of Neisseria would produce Hydroxyprolylaminopeptidase

    • A.

      N. flavencens

    • B.

      N. sicca

    • C.

      N gonorrhoeae

    • D.

      N. meningitidis

    • E.

      N. cinerea

    • F.

      N. lactamica

    Correct Answer
    C. N gonorrhoeae
    Explanation
    N. gonorrhoeae is the correct answer because it is the only species of Neisseria that produces Hydroxyprolylaminopeptidase. The other species listed do not produce this enzyme.

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  • 17. 

    Moraxella catarrhalis tests POSITIVE in which of the tests listed

    • A.

      DNAse

    • B.

      Butyrate disk test

    • C.

      Nitrate reduction

    • D.

      Superoxol test

    • E.

      Carbohydrate utilization

    Correct Answer(s)
    A. DNAse
    B. Butyrate disk test
    C. Nitrate reduction
    Explanation
    Moraxella catarrhalis tests positive in the DNAse test, Butyrate disk test, and Nitrate reduction test. The DNAse test is used to determine if an organism produces the enzyme DNAse, which breaks down DNA. Moraxella catarrhalis produces this enzyme, resulting in a positive test. The Butyrate disk test is used to detect the ability of an organism to utilize butyrate as a carbon source. Moraxella catarrhalis is able to utilize butyrate, leading to a positive result. The Nitrate reduction test is used to determine if an organism is capable of reducing nitrate to nitrite. Moraxella catarrhalis is capable of this reduction, resulting in a positive test.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Apr 27, 2021
    Quiz Created by
    Catherine Halcomb
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