- What are the 4 types of nucleic acids?
- What does double stranded RNA mean?
- Where is DNA in bacteriophage?
- Can a bacteriophage make a human sick?
- Does a bacteriophage have DNA?
- Do viruses have single or double stranded DNA?
- Which is more dangerous RNA or DNA virus?
- What causes double stranded DNA?
- What are the 2 main types of nucleic acids?
- Why bacteriophage is called t4?
- Which viruses have double stranded DNA?
- What type of nucleic acid is double stranded?
What are the 4 types of nucleic acids?
Each nucleic acid contains four of five possible nitrogen-containing bases: adenine (A), guanine (G), cytosine (C), thymine (T), and uracil (U).
A and G are categorized as purines, and C, T, and U are collectively called pyrimidines..
What does double stranded RNA mean?
Double-stranded RNA viruses (dsRNA viruses) are a polyphyletic group of viruses that have double-stranded genomes made of ribonucleic acid. … The two groups do not share a common dsRNA virus ancestor. Double-stranded RNA viruses evolved two separate times from positive-strand RNA viruses.
Where is DNA in bacteriophage?
Entry: The phage injects its double-stranded DNA genome into the cytoplasm of the bacterium. DNA copying and protein synthesis: Phage DNA is copied, and phage genes are expressed to make proteins, such as capsid proteins.
Can a bacteriophage make a human sick?
Some bacteria can enter the human body and make people ill. … Bacteriophages are viruses that infect bacteria but are harmless to humans. To reproduce, they get into a bacterium, where they multiply, and finally they break the bacterial cell open to release the new viruses. Therefore, bacteriophages kill bacteria.
Does a bacteriophage have DNA?
A bacteriophage (/bækˈtɪərioʊfeɪdʒ/), also known informally as a phage (/feɪdʒ/), is a virus that infects and replicates within bacteria and archaea. … Bacteriophages are composed of proteins that encapsulate a DNA or RNA genome, and may have structures that are either simple or elaborate.
Do viruses have single or double stranded DNA?
Abstract. Only a few human and animal pathogenic viruses are known that have a single-stranded DNA genome. The members of the family Parvoviridae have a linear genome, whereas the genome of the members of the family Circoviridae and that of the recently created family Anelloviridae have a circular structure.
Which is more dangerous RNA or DNA virus?
RNA viruses generally have very high mutation rates compared to DNA viruses, because viral RNA polymerases lack the proofreading ability of DNA polymerases. This is one reason why it is difficult to make effective vaccines to prevent diseases caused by RNA viruses—diversity is their strength.
What causes double stranded DNA?
The genome of a cell is continuously damaged, which is inevitable because DNA damage often arises as a result of normal cellular processes. … The result is double-strand breaks (DSBs) in the chromosome. A DSB can also be caused by environmental exposure to irradiation, other chemical agents, or ultraviolet light (UV).
What are the 2 main types of nucleic acids?
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material found in all living organisms, ranging from single-celled bacteria to multicellular mammals.
Why bacteriophage is called t4?
Escherichia virus T4 is a species of bacteriophages that infect Escherichia coli bacteria. … Bacteriophage means to “eat bacteria”, and phages are well known for being obligate intracellular parasites that reproduce within the host cell and are released when the host is destroyed by lysis.
Which viruses have double stranded DNA?
Herpesviruses and Poxviruses Many animal viruses use double-stranded DNA for their genomes. Herpesvirus is a simple virus that has a protein coat and outer envelope surrounding the double-stranded DNA genome. Poxvirus has two envelope layers. A protein layer, known as the palisade, is embedded within the core envelope.
What type of nucleic acid is double stranded?
Double-stranded DNA consists of two polynucleotide chains whose nitrogenous bases are connected by hydrogen bonds. Within this arrangement, each strand mirrors the other as a result of the anti-parallel orientation of the sugar-phosphate backbones, as well as the complementary nature of the A-T and C-G base pairing.