Each cell must produce only a subset of the genes that are being expressed. This subset is what differentiates one cell from another. For example, cancer cells must be expressing one subset of genes when compared to normal cells. Photosynthetic cells in a leaf are expressing different genes from root cells. A 'Norther blot' is used for:.

The question is incomplete as it does not have the options which are:

A. detection of specific DNA sequences

B. determining the effects of arctic global warming

C. sequencing the individual amino acids of specific proteins.

D. detection of proteins using antibodies as in a home pregnancy test.

E. detection of specific RNA sequences

E. detection of specific RNA sequences

Explanation:

The blotting experiment is performed to identify the particular type of molecule in the solution by using the nylon sheet as a blot and then radioactive marker to identify the molecule. The molecules identified by the technique are the RNA, Proteins and DNA.

In the given question, the RNA molecules are formed when the gene is expressed therefore the blotting technique used to identify the different RNA molecules will be the Northern blotting.

Thus, Option-E is correct.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.