WebTranscription is the first step in gene expression. It involves copying a gene's DNA sequence to make an RNA molecule. Transcription is performed by enzymes called RNA polymerases, which link nucleotides to form an RNA strand (using a DNA strand as a template). Transcription has three stages: initiation, elongation, and termination. WebAnswered by MonOcares. 1. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). 2. DNA cannot exit the nucleus because doing so runs the risk of damaging it. The genetic code and all the data required for cells and organisms to function properly are carried by DNA.
DNA Is a Structure That Encodes Biological Information
WebMay 16, 2024 · The four primary histones of eukaryotes—H2A, H2B, H3 and H4—assemble into octamers with two copies of each. These octamers, called nucleosomes, are the basic units of eukaryotic DNA packaging ... WebIn prokaryotic cells, the DNA is mostly located in a central part of the cell called the nucleoid, which is not enclosed in a nuclear membrane. Most of the genetic material in most prokaryotes takes the form of a single circular DNA molecule, or chromosome. In addition, many prokaryotes also contain small circular DNA molecules called plasmids. jb hunt verification
First eukaryotes found without a normal cellular power supply
WebMay 12, 2016 · Mitochondria are the descendants of bacteria that settled down inside primordial eukaryotic cells, eventually becoming the power plants for their new hosts. Although mitochondria are a signature feature of eukaryotes, scientists have long wondered whether some of them might have gotten rid of the organelles. The diarrhea-causing … WebJul 20, 1998 · DNA, abbreviation of deoxyribonucleic acid, organic chemical of complex molecular structure that is found in all prokaryotic and … WebJun 8, 2024 · Figure 4.6. 1: Eukaryotic Nucleus: The nucleus stores chromatin (DNA plus proteins) in a gel-like substance called the nucleoplasm.The nucleolus is a condensed region of chromatin where ribosome synthesis occurs.The boundary of the nucleus is called the nuclear envelope.It consists of two phospholipid bilayers: an outer membrane and an … j.b. hunt transport lowell ar