Quiz Answers
- Mesosomes are
- a. Kind of ribosomes
- b. Formed during cell lysis
- c. A part of cell wall
- d. Principal sites of respiratory enzymes ✅
- The characteristic shape of the bacteria is maintained because of
- a. Capsule
- b. Cell wall ✅
- c. Cell membrane
- d. Slime layer
- Bacterial capsule is chemically composed of
- a. Polypeptide
- b. Polynucleotides
- c. Polysaccharides
- d. Polypeptides or polysaccharides ✅
- The cell wall deficient form of bacteria is
- a. Mycoplasma
- b. ‘L’ form ✅
- c. Protoplast
- d. Spheroplast
- Mesosomes are also known as
- a. Mitochondria
- b. Chloroplasts
- c. Golgi complex
- d. Chondroids ✅
- The differences between Gram-positive and Gram-negative bacteria is shown to reside in the
- a. Cell wall ✅
- b. Nucleus
- c. Cell membrane
- d. Mesosomes
- Capsule formation occurs in the presence of
- a. Albumin
- b. Charcoal
- c. Serum ✅
- d. Starch
- The virulence determining antigens of microorganisms may be
- a. Proteins and polysaccharides
- b. Carbohydrate – protein complexes
- c. Polysaccharide – Phospholipid – Protein complexes
- d. All of these ✅
- Organelles with hydrolytic enzymes are
- a. Mitochondria
- b. Golgi complex
- c. Lysosomes ✅
- d. Ribosomes
- Bacterial locomotion is accomplished by
- a. Fimbria
- b. Flagella
- c. Cytoskeleton
- d. Both a and b ✅
- Fimbriae are demonstrated by
- a. Culture
- b. Gram stain
- c. Biochemical reactions
- d. Haemagglutination test ✅
- The motile bacterium is
- a. Salmonella typhi ✅
- b. Klebsiella pneumoniae
- c. Bacillus anthracis
- d. Shigella flexneri
- Following cocci are non-motile except
- a. Staphylococcus
- b. Meningococcus
- c. Gonococcus
- d. Rhodococcus agilis ✅
- Metachromatic granules are chemically composed of
- a. Lipids
- b. Proteins
- c. Polymetaphosphates ✅
- d. Polysaccharide
- Metachromatic granules can be stained with
- a. Saffranine
- b. Methylene blue ✅
- c. Crystal violet
- d. Pienic acid
- Bacteria multiply by
- a. Spore formation
- b. Simple binary fission
- c. Conjugation
- d. Gametes ✅
- Bacterial spores are
- a. Weakly acid-fast ✅
- b. Strongly acid-fast
- c. Alcohol-fast
- d. Non-acid-fast
- Endospores can be stained with
- a. Safranine
- b. Crystal violet
- c. Methylene blue
- d. Malachite green ✅
- The following bacteria produce pigment, except
- a. Pseudomonas pyocyaneus
- b. Serratia marcescens
- c. D. pneumoniae ✅
- d. Staphylococcus aureus
- The order of stains in Gram-staining procedure is
- a. Crystal violet, Iodine solution, Alcohol, Safranin ✅
- b. Iodine solution, Crystal violet, Safranin, Alcohol
- c. Alcohol, Crystal violet, Iodine solution, Safranin
- d. All of these
- The percentage of alcohol used in Gram-staining is
- a. 75%
- b. 90% ✅
- c. 60%
- d. 25%
- Gram-positive bacteria appear as
- a. Pink
- b. Violet ✅
- c. Both a & b
- d. None of these
- Gram-negative bacteria appear as
- a. Pink ✅
- b. Violet
- c. Both a & b
- d. None of these
- The action of alcohol during Gram-staining is
- a. Allows the color
- b. It adds color
- c. Decolorizes the cells ✅
- d. None of these
- Lipid content is more in
- a. Gram-negative bacteria ✅
- b. Gram-positive bacteria
- c. Same in both
- d. None of these
- Cell wall is
- a. Thick in Gram-positive than Gram-negative ✅
- b. Thick in Gram-negative than Gram-positive
- c. Equal in both
- d. In Gram-negative cell wall is absent
- The lipid content present in Gram-positive bacterial cell wall is
- a. 1-10%
- b. 1-5% ✅
- c. 2-8%
- d. None of these
- Rickettsiae stained by this technique respond as
- a. Gram-positive
- b. Gram-negative ✅
- c. Between positive and negative
- d. None of these
- Chlamydiae occur in
- a. Elementary bodies
- b. Reticulate bodies
- c. Complex structures
- d. a and b ✅
- Chlamydiae can be stained better with
- a. Ziehl-Neelsen staining
- b. Castaneda & Machiavello stains
- c. Gimenez stains
- d. Both b and c ✅
- Algae means
- a. Fresh water organisms
- b. Sea weeds ✅
- c. Fresh water weeds
- d. None of these
- The study of algae is known as
- a. Algalogy
- b. Phycology ✅
- c. Mycology
- d. Bacteriology
- The free-floating algae are known as
- a. Phytoplankton ✅
- b. Benthons
- c. Sea weeds
- d. None of these
- Sexual reproduction of algae is carried by
- a. Isogamy
- b. Anisogamy
- c. Oogamy
- d. All the above ✅
- In algae, the advanced type of sexual reproduction is
- a. Isogamy
- b. Anisogamy
- c. Oogamy ✅
- d. None of these
- Alginic acids and its salts are obtained from the wall of
- a. Red algae
- b. Brown algae ✅
- c. Green algae
- d. Red and brown algae
- The molds obtained nutrition from dead and decaying matter which are called
- a. Saprophytes ✅
- b. Parasites
- c. Commensals
- d. None of these
- Most molds are capable of growing in the temperature range between
- a. 0°C – 25°C
- b. 0°C – 35°C ✅
- c. 10°C – 25°C
- d. 10°C – 35°C
- Examples for actinomycetes
- a. Streptomyces
- b. Spirillospora
- c. Frankia
- d. Dermatophilus
- e. All of the above ✅
- Pellicle is found in only
- a. Algae
- b. Fungi ✅
- c. Bacteria
- d. Protozoans
- The largest virus is
- a. Parvo virus
- b. Pox virus ✅
- c. Rhabdo virus
- d. None of these
- The smallest virus is
- a. Parvo virus
- b. Rhabdo virus ✅
- c. Pox virus
- d. Adeno virus
- The extracellular infectious virus particle is called
- a. Capsid
- b. Nucleocapsid
- c. Virion ✅
- d. None of these
- Shape of bacteriophage is
- a. Brick shape
- b. Bullet shape
- c. Helical shape
- d. Tadpole shape ✅
- If only one stain is used for staining a specimen
- a. Simple staining ✅
- b. Negative staining
- c. Differential staining
- d. None of these
- Other than the sample (specimen) the remaining portion is stained then it is called
- a. Simple staining
- b. Negative staining ✅
- c. Differential staining
- d. None of these
- If more than one stain is used, such staining is called
- a. Simple staining
- b. Negative staining
- c. Differential staining ✅
- d. None of these
- ‘Fluorescence’ was first observed by
- a. Kohler ✅
- b. Coons
- c. Both a and b
- d. None of these
- By using fluorescence property, fluorescent antibody technique was developed by
- a. Kohler
- b. Coons ✅
- c. Both a and b
- d. None of these
- During staining for Electron Microscopy, the method which improves contrast of specimen is
- a. Positive staining
- b. Negative staining ✅
- c. Shadow staining
- d. None of these
