What is plus and minus strand DNA?
Quick Reference. 1. in a single-stranded RNA virus, a plus strand is one having the same polarity as viral mRNA and containing codon sequences that can be translated into viral protein. A minus strand is a noncoding strand that must be copied by an RNA-dependent RNA polymerase to produce a translatable mRNA.
What is the difference between positive and negative strand RNA?
Positive-sense viral RNA is similar to mRNA and thus can be immediately translated by the host cell. Negative-sense viral RNA is complementary to mRNA and thus must be converted to positive-sense RNA by an RNA polymerase before translation.
What is positive-sense and negative-sense DNA?
For example, negative-sense strand of DNA is equivalent to the template strand, whereas the positive-sense strand is the non-template strand whose nucleotide sequence is equivalent to the sequence of the mRNA transcript. …
What is the difference between the template and Nontemplate strand of DNA?
The template strand is the one that RNA polymerase uses as the basis to build the RNA. This strand is also called the non-coding strand or the antisense strand. The non-template strand has the identical sequence of the RNA (except for the substituion of U for T).
What is the strand of DNA?
The DNA molecule consists of two strands that wind around one another to form a shape known as a double helix. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases–adenine (A), cytosine (C), guanine (G), and thymine (T).
What is the meaning of positive sense RNA virus?
Positive-strand RNA viruses (+ssRNA viruses) are a group of related viruses that have positive-sense, single-stranded genomes made of ribonucleic acid. The positive-sense genome can act as messenger RNA (mRNA) and can be directly translated into viral proteins by the host cell’s ribosomes.
What is a strand of a virus?
Positive-strand RNA virus: Also known as a sense-strand RNA virus, a virus whose genetic information consists of a single strand of RNA that is the positive (or sense) strand which encodes mRNA (messenger RNA) and protein. Replication in positive-strand RNA viruses is via a negative-strand intermediate.
What is the role of the DNA template strand?
What is the role of DNA template? The DNA template is used by RNA polymerase to produce a strand of RNA with a nucleotide sequence that is the same as the coding strand for the production of functional RNA units and mRNA for making proteins.
What is a template strand in biology?
The term template strand refers to the sequence of DNA that is copied during the synthesis of mRNA. Although RNA polymerase must recognize sequences on the template strand, by convention we draw the DNA sequence and regulatory signals on the “mRNA-like” strand.
What is a strand in biology?
Supplement. The sense strand is the segment in the DNA to be transcribed to make mRNA. The resulting mRNA transcript can then be processed (e.g. splicing, in eukaryotes) and translated into a polypeptide. Also called: coding strand.