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balandron [24]
3 years ago
14

A microscopist is viewing a very small organelle, the ribosome, which measures about 20 nanometers across. What microscopic inst

rument is being used?(A) electron(B) light(C) dissecting(D) fluorescent (E) inverted
Biology
1 answer:
german3 years ago
3 0

Answer:

Letter A, Electron microscope

Explanation:

The electron microscope is used to visualize high-resolution images of biological specimens. It used to see in detail very small  cells, organelles, cells tissues,  molecular complexes, etc. The ribosome is a complex molecule made of proteins where the translation of proteins is made, it is very small that can be seen in detail using the electron microscope.

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Normally, this region is imprinted in the sperm, but not the egg. This means that the DNA on the ____________ copy of the chromo
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Explanation:

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Genetic imprinting modulates gene expression by chemical modification of DNA and/or modification of chromatin structure. Often, genetic imprinting causes a gene to be expressed only on the chromosome inherited from one of the parents. One example of imprinting is DNA methylation, which is a process by which methyl groups are added to DNA. <u>Methylation modifies DNA function when found in the promoter gene, repressing gene transcription. This means that a methylated gene will not be expressed</u>, that is, it will not produce a protein encoded by that gene. So, if a region of DNA is imprinted in the sperm cell, the paternal chromosome inherited from this sperm will be methylated in the genes of the offspring. And the offspring will only express the maternal copy inherited, which will not be methylated.

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<h3>What is potassium?</h3>

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Thus,  the one electron in its valence shell would most likely be  donated to form a positively charged ion.

Learn more about potassium ion:brainly.com/question/24336764

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