DNA: DNA, or deoxyribonucleic acid, is the principal molecule of heredity in living things. DNA consists of two polynucleotide chains that arrange themselves into a twisted-ladder like structure known as the double helix. Answer and Explanation: ...
James Watson and Francis Crick discovered the three dimensional shape of DNA in the early 1950s. The shape, which they described as a double helix, has the shape of a twisted ladder.The Genetic CodeThink of the four nucleotides that make up DNA as the letters of an alphabet. To spell ...
The structure of DNA is called the "double helix." The double helix is composed of two polynucleotide strands arranged in a twisted ladder... Learn more about this topic: DNA | Definition, Characteristics & Sequencing from Chapter 4/ Lesson 1 ...
In preparation for mitosis, the DNA condenses into tightly wound, highly organized chromosomes. When it's time to create a complementary strand of mRNA from a segment of the DNA, the DNA ladder untwists with the assistance of the enzyme DNA helicase. The helicase separates the hydrogen bonds...
RNase T1 cleaves single-stranded RNA 3' to guanosine residues. Partial digestion of 3' or 5' labeled RNA with this enzyme thus generates a ladder of G residues. The 1X RNA Sequencing Buffer used in the procedure contains 7 M Urea to help denature RNA se...
For decades, a spectacular structural motif has been the focus of research in two families of animal membrane proteins: the hematopoietic cytokine type I receptors (HCR) and the thrombospondin repeat type 1 (TSR-1) domain containing proteins. Although these families include some of the best-studie...
Learn what DNA ligase does within the cell. Understand details about how restriction enzymes work. See examples of DNA ligase functions and...
The site-specific double strand cut determined by the CRISPR/Cas9 system activates the repair mechanisms of DNA double strand break, which can be exploited to correct, introduce, or silence a gene. The CRISPR/Cas9 system from Streptococcus pyogenes has already been successfully used in treating ...
DNA replication is a vital procedure in all living organisms, ensuring the accurate duplication of cellular genetic information before cell division occurs, producing two genetically identical daughter cells. Within eukaryotes, this replication process is confined to the S phase (1, 2, 3). Replicating...
Recombinant plasmid pEGFP-ORF2 was transiently transfected into vero cells, expression was determined by green fluorescent protein and RT-PCR, changes of cell apoptosis were determined by Giemsa stain, MTT assay and DNA ladder. We found that the green fluorescent protein has a high expressed ...