There are five major types of histones in eukaryotic cells. One of these is not part of the structure of nucleosomes and is thought to participate in forming the 30-nm condensed chromatin fiber. Which histone is this?

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#Question id: 37877

#Plant Biotechnology

In a turbidostat, fresh medium is added:

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#Question id: 37878

#Plant Biotechnology

Assertion (A): In a closed continuous culture system, the total cell biomass continues to increase over time. 

Reason (R): In this system, cells are separated from the removed spent medium and recycled back into the culture vessel

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#Question id: 37879

#Plant Biotechnology

Assertion (A): Open continuous cultures are capable of maintaining cells in a steady state of submaximal growth indefinitely.

Reason (R): In open continuous cultures, only the spent medium is removed while the cells are retained within the bioreactor.

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#Question id: 37880

#Plant Biotechnology

Assertion (A): To maintain a steady state in an open continuous culture, the volume of fresh medium added must be equal to the volume of culture removed. 

Reason (R): Without balancing the input and output volumes, the culture volume would change, disrupting the steady state and nutrient availability.

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#Question id: 37881

#Plant Biotechnology

Assertion (A): Continuous culture systems are strictly classified as closed systems where no material leaves the vessel. 

Reason (R): Continuous cultures require the regular replacement of a portion of the spent medium with fresh medium.

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#Question id: 37882

#Plant Biotechnology

Statement I: Plant cells can be immobilized by encapsulating them in materials such as agarose or calcium alginate gels. 

Statement II: Immobilized cells are usually packed in a column where liquid medium is kept stagnant to prevent cell detachment.

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