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What is nucleus where it is found?
Nucleus : The nucleus is present only in eukaryotic cells. It is the control center and is generally found in the center of the cell. The nucleus is the site of synthesis of the molecules responsible for transmission of genetic information - DNA, or deoxyribose nucleic acid, and RNA, ribonucleic acid. A double membrane called the nuclear envelope surrounds it.
Outside the nuclear envelope is a gel-like substance called the cytoplasm, which fills most of the cell. The cytoplasm contains organelles and various types of filaments that serve to hold the shape of the cell and become involved in cell division, locomotion, and adhesion. RNA and other substances move from the nucleus to the cytoplasm through complex holes in the nuclear membrane called nuclear pores.
The counterpart of the cytoplasm inside the nucleus is the nucleoplasm, which contains fine strands of chromatin, a combination of DNA and proteins. During cell division, chromatin coils up and forms chromosomes.
Most nuclei also contain one or more spherical or egg-shaped structures called nucleoli (singular - nucleolus). The function of a nucleolus is to synthesize and partially assemble ribosomes, structures that serve in the assembly of proteins. The ribosomes then migrate to the cytoplasm where proteins are formed.
Consistently overwatering a potted tomato pla nt will eventually kill it. Using the map, suggest why waterlogged soil results in plant death. O2 cannot reach respiring root cells.
Examination is begun by placing the transducer in left parasternal region, usually in the third or fourth left intercostal space. From this position, a sector image of the heart
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How many grams of sodium dodecyl sulfate (mw = 288.37) would you dissolve in 80 mLs of water to make a 20% solution of SDS?
What is the difference between homozygosity and heterozygosity? Homozygosity happens when an individual has two identical alleles of a gene, for instance, AA or aa. Heterozygos
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