The toxic shock syndrome toxin is produced by some Salmonella species when there is not sufficient iron present. When iron is present, it prevents transcription of the TSS-toxin gene. Iron therefore serves as __________.

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#Question id: 2136

#XL - S Microbiology

When a bacterium such as E. coli is shifted from a warmer growth temperature to a cooler growth temperature, it compensates by:

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#Question id: 13233

#XL - R Botany

Tracheids are

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#Question id: 16481

#XL - T Zoology

The evolution of continuous cell lines from primary cultures occurs due to which reason

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#Question id: 757

#XL - Q Biochemistry

_______________ a bacterial enzyme, uses the energy of ATP hydrolysis to introduce negative supercoiling into DNA hence removing positive supercoiling generated during replication.

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#Question id: 20131

#XL - P Chemistry

Under certain conditions, the value of ΔG for a hypothetical reaction, X + Y ¾→ Z is greater than zero, then –