WebGlossary. DNA ligase: the enzyme that catalyzes the joining of DNA fragments together DNA polymerase: an enzyme that synthesizes a new strand of DNA complementary to a template strand helicase: an enzyme that helps to open up the DNA helix during DNA replication by breaking the hydrogen bonds lagging strand: during replication of the 3′ to … WebNov 12, 2024 · The strands of DNA in the double-helix run in opposite directions and genes can be encoded on either strand. This means that transcription can take place along the chromosome in both directions. Figure 2 – DNA helix with each strand of DNA being read from 5′ to 3′ and running in opposite directions. The two strands can be thought of like ...
Molecular mechanism of DNA replication - Khan Academy
WebStudy with Quizlet and memorize flashcards containing terms like Among the microorganisms, various genomes can include A. chromosomes. B. plasmids. C. mitochondrial DNA. D. chloroplast DNA. E. All of the choices are correct., Eukaryotic chromosomes differ from bacterial chromosomes because only eukaryotes have A. … WebJul 1, 2024 · RNA molecules are much shorter than DNA molecules; only a portion of one DNA strand is copied or transcribed to make an RNA molecule. RNA is built from ribonucleotides rather than deoxyribonucleotides. ... Synthesis of the RNA strand takes place in the 5′ to 3′ direction, antiparallel to the template strand. Only a short segment … dave brand obituary
Reading DNA - where to start? - Genomics Education Programme
WebA. only short DNA sequences can extend off the RNA primers. B. DNA polymerase can assemble DNA only in the 5' to 3' direction. C. DNA polymerase can assemble DNA … WebThe DNA-polymerase can only add nucleotides on an existing strand of DNA, so the primer (located at ori - origin of replication) "fakes" a DNA strand with a couple of RNA nucleotides. It's just to get things going. The primer is always broken down and replaced by DNA at the end of the replication process. 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. black and gold dorm decor