. Whi
A)
0)

. Whi
i.
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ili.
iv.
A)
0)

027/22

ich of the following staining procedure is employed for DNA ?
Feulgen staining B) Negative staining
2160 Neelsen staining D) Sudan black B staining

ich of the following inclusion body/bodies are present in Cyanobacteria ?
Cyanophycin granules

Carboxysomes

Poly metaphosphate

Poly B hydroxy butyrate
i and ii B) ii and iii
Only iii D) Only iv

. The following statements are characteristic of metabolic plasmids.
i. They carry genes for enzymes that degrade aromatic substances.
ii. They carry genes required for Rhizobium to induce legume nodulation.
iii. They contain genes that codes for an enterotoxin.
iv. They contain genes coding for antibiotic resistance.

A)
०)

i and ii B) ii and iii
Only iii D) ॥ and iv

. Pick out the false statement/statements against peptidoglycan of bacteria.
i. The presence of D amino acids protects against degradation by most peptidases.

A)
०)

~ Whi

A)
०)

0

-alanine, D-glutamic acid and mesodiaminopimelic acid, present only in bacterial
eptidoglycan are not found in other proteins.

ு

iii. Many bacteria replace mesodiaminopimelic acid with L-lysine.
A

| bacteria possess the peptide interbridge.
i and ii B) ii and iii
Only iv D) Only ii

ich of the following statements is/are not true regarding halophiles ?

. Halophiles grow optimally in the presence of NaCl or other salts at a concentration

above 0.2 M.

ii. Halophilic prokaryotes accumulate enormous quantities of potassium in order to

remain hypertonic to their environment.

iii. The plasma membrane and cell wall of Halobacterium are stabilized by low

concentrations of sodium ion.

iv. Enzymes, ribosomes and transport proteins requires high potassium levels for

stability and activity.
i, ॥ and iii B) ii and iii
Only iv 0) Only i

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