Mechanisms of silencing and activation antagonize each other. During the cell cycle, replication and mitosis are the stages at which epigenetic memory is most likely to be erased. Each stage presents a different molecular challenge to memory. During replication, newly assembled chromatin is acetylated...
a. How does the pairing of chromosomes differ in meiosis compared to mitosis? b. What is independent assortment? c. How many cell divisions occur in meiosis? Which of these pairs of chromosomes have similar size and genetic composition? A. Chromatids B. Diploid C. Haploid D....
What elements are involved in the structure of proteins? What are intracellular enzymes? Is DNA found in chromatin throughout the cell life cycle? If a protein has 1398 nucleotides how many amino acids will be made? What is a type of metabolism that is the breakdown of complex molecules?
What does a nucleotide in DNA consist of? What is the nucleotide that RNA uses instead of thymidine ("T")? DNA polymerase I, DNA ligase, and Topoisomerase I each catalyze the formation of phosphodiester bonds that are vital ...
Chromosomes are nothing more than distinct pieces of chromatin. Humans have 23 different chromosomes, 22 that are numbered and one that is a sex chromosome, either X or Y. Every somatic cell in your body contains a pair of each chromosome, one from your mother and one from your father. Pa...
Nonetheless, the high frequency of interactions among second-nearest nucleosome neighbors stemming from sequencing-based experiments of chromatin in situ [40,42,47] does not immediately provide evidence for the formation of regular zigzag structures. Indeed, recent multiscale modeling found that even ...
Autoantibodies and lupus-like syndromes can develop following the use of certain medications; however, although many patients develop autoantibodies, only a minority develop clinical features. Although these autoantibodies primarily consist of antinuclear and antihistone antibodies, additional types of antibody...
high-grade and discohesive neoplastic cell proliferation. These cells were of medium to large size with sparse cytoplasm and irregular nuclei with vesicular chromatin and prominent nucleolus. Numerous mitotic figures were seen. This proliferation was mainly found in the lumen of small and medium-sized...
What does a homologous pair of chromosomes consist of during prophase? Which of these pairs of chromosomes have similar size and genetic composition? A. Chromatids B. Diploid C. Haploid D. Chromatin E. Homologous Chromosomes Homologous chromosomes recombine with each other during which cell cycle(...
What is the role of nucleotides in DNA structure? Why do adenine and thymine have a double bond? What are the nucleotides involved in DNA synthesis? What is the relationship between DNA and chromatin? What are the pairings for the bases in RNA and DNA?