Microbiology - Study24x7
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microbiology
Microbiology

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PG Medical Class 12 (PCB) NEET / Medical Class 11 (PCB)
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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The arrangement, in which flagella are distributed all round the bacterial cell, is known as

A

lophotrichous

B

amphitrichous

C

peritrichous

D

monotrichous

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The cocci which forms a chain is

A

Streptococci

B

diplococci

C

Staphylococci

D

Tetracocci

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The next to last step in peptidoglycan biosynthesis is

A

synthesis of the NAM-peptide subunit

B

removal of the subunit from bactoprenol

C

linking the sugar of the disaccharide-peptide unit to the growing peptidoglycan chain

D

cross-linking the peptide side chains of peptidoglycan

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The structure responsible for motility of bacteria is

A

pilli

B

flagella

C

sheath

D

capsules

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Chemotaxis is a phenomenon of

A

swimming away of bacteria

B

swimming towards a bacteria

C

swimming away or towards of bacteria in presence of chemical compound

D

none of the above

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Cytoplasmic inclusions include

A

ribosomes

B

mesosomes

C

fat globules

D

all of these

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The last step in synthesis of peptidoglycan is

A

attachment of a peptide to muramic acid

B

attaching two amino acids to form a cross-link

C

attachment of a portion of peptidoglycan to a membrane lipid

D

binding of penicillin to a membrane protein

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Genetic system is located in the prokaryotes in

A

nucleoid

B

chromatin

C

nuclear material

D

all of these

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Peptidoglycan is also known as

A

N-acetyl muramic acid

B

murein mucopeptide

C

N acetylglucosamine

D

mesodiaminopimetic acid

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The cell wall of

A

gram-positive bacteria are thicker than gram-negative bacteria

B

gram-negative bacteria are thicker than gram-positive bacteria

C

both have same thickness but composition is different

D

none of these

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The cell walls of many gram positive bacteria can be easily destroyed by the enzyme known as

A

lipase

B

lysozyme

C

pectinase

D

peroxidase

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Bacteria having no flagella are unable to

A

move

B

reproduce

C

stick to tissue surfaces

D

grow in nutrient agar

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Peptidoglycan accounts for _______ of the dry weight of cell wall in many gram positive bacteria

A

50% or more

B

About 10%

C

11%+ 0.22%

D

About 20%

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Which of the following may contain fimbriae?

A

Gram-positive bacteria

B

Gram-negative bacteria

C

Both (a) and (b)

D

None of these

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The cooci which mostly occur in single or pairs are

A

Streptococci

B

Diplococci

C

Tetracocci

D

None of these

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The protein from which hook and filaments of flagella are composed of, is

A

keratin

B

flagellin

C

gelatin

D

casein

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Flagella move the cell by

A

many flagella beating in a synchronous, whip-like motion

B

an individual flagellum beating in a whip-like motion

C

spinning like a propeller

D

attaching to nearby particles and contracting

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

A cluster of polar flagella is called

A

lophotrichous

B

amphitrichous

C

monotrichous

D

petritrichous

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Which of the following organisms can be demonstrated with silver impregnation method?

A

Vibrios

B

Salmonella

C

Spirochaetes

D

Shigella

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Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/html/live/makepost.php on line 52
Microbiology
4 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The process of Gram staining is based on the ability of bacterial cell wall

A

to retain the safranin dye

B

to retain the crystal violet dye during solvent treatment

C

to retain part of both dyes

D

none of above

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