A. The bacterial nucleoid is 80% DNA by mass.

B. Bacteria have similar morphological features as of eukaryotic chromosomes, 

C. Bacterial genomes are organized into definite substructures within the cell. 

D. Bacterial Protein HU is a dimer that condenses DNA, possibly wrapping it into a beadlike structure.

Find true and false

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#Question id: 16140

#Unit 13. Methods in Biology

Many mouse genes are “tissue-specific,” that is, they are present throughout the body but are expressed in only one of the animal’s many tissue types. (Other mouse genes are expressed throughout the body, or in multiple tissues.) Geneticists can study the regulation of a mouse gene by fusing the gene’s promoter region to the LacZ coding sequence and injecting the construct to create a transgenic mouse. Fusion of the mouse amylase promoter to LacZ yielded a Pamylase-LacZ construct.

You are surprised to observe that mice homozygous for the transgene insertion display a serious heart defect. (Heterozygotes have normal hearts.) which one is a  possible explanation?

a) LacZ overexpression (with two copies of the transgene) causes the defect.

b) the insertion disrupted a gene that is haploinsufficient.

c) the insertion disrupted a gene that is haplosufficient.

d) LacZ expression inhibition (with two copies of the transgene) causes the defect.

Which of the following statements is correct  predict about the  heart defect?

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#Question id: 17270

#Unit 13. Methods in Biology

which of the following are the three important components of Electrophoresis 

TLS Online TPP Program

#Question id: 17271

#Unit 13. Methods in Biology

Electrophoretic resolution can be mainly change by changing the

TLS Online TPP Program

#Question id: 17272

#Unit 13. Methods in Biology

We need to minimum buffering capacity is required so that the pH value of the samples analyzed does not have any influence on the system, 

What would happen if we used the higher buffering concentration

a) more electric power is applied, resulting in higher heat development. 

b) less electric power for less time  is applied, resulting in very high  heat development

c) higher buffering concentration need more electric power resulting increases in the temperature will increase the mobility and rate of migration of ions.

d) using the higher buffering concentration shows no affect at all

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#Question id: 17278

#Unit 13. Methods in Biology

In DNA isolation, which of the following enzyme remove/digest proteins in presence of SDS or chelating agent

TLS Online TPP Program

#Question id: 17279

#Unit 13. Methods in Biology

Which of the following is relatively more stable to heat