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Nucleosome core particles are observed when chromatin in interphase is treated to cause the chromatin to unfold partially. The resulting image, via an electron microscope, is "beads on a string". The string is the DNA, while each bead in the nucleosome is a core particle. The nucleosome core particle is composed of DNA and histone proteins. [29]
Nucleic acids consist of a chain of linked units called nucleotides. Each nucleotide consists of three subunits: a phosphate group and a sugar (ribose in the case of RNA, deoxyribose in DNA) make up the backbone of the nucleic acid strand, and attached to the sugar is one of a set of nucleobases.
Quizlet's primary products include digital flash cards, matching games, practice electronic assessments, and live quizzes. In 2017, 1 in 2 high school students used Quizlet. [ 4 ] As of December 2021, Quizlet has over 500 million user-generated flashcard sets and more than 60 million active users.
WASHINGTON (Reuters) -The United States on Monday announced nearly $6 billion in additional military and budget assistance for Ukraine as President Joe Biden uses his final weeks in office to ...
MOSCOW (Reuters) -Russian President Vladimir Putin said on Thursday that he was ready to compromise over Ukraine in possible talks with U.S. President-elect Donald Trump on ending the war and had ...
Epigenomics is the study of the complete set of epigenetic modifications on the genetic material of a cell, known as the epigenome.The field is analogous to genomics and proteomics, which are the study of the genome and proteome of a cell.
Sean Manaea and the New York Mets finalized a $75 million, three-year contract Friday night that keeps one of the team's best pitchers last season at the front of a remodeled rotation. Manaea ...
A flashcard or flash card is a card bearing information on both sides, usually intended to practice and/or aid memorization. It can be virtual (part of a flashcard software) or physical. Typically, each flashcard bears a question or definition on one side and an answer or target term on the other.