List three mechanisms that relax the twisting stress in helical DNA molecules.

Q: The melting temperature Tm of DNA can be predicted by calculation without actually measuring it.…

A: It is the temperature at which half of the DNA has been converted to single-stranded DNA. The…

Q: what is the adenine content

A: In double-stranded DNA, 3 hydrogen bonds form between guanine and cytosine and make them a pair. On…

Q: Bearing in mind the different number of hydrogen bonds that form between the two different purine-…

A: DNA and RNA are polynucleotides that are composed of a chain of nucleotide monomers with distinct…

Q: Hydroxylamine (NH2OH) converts cytosine to the compound shown below. With which base does this…

A: Transition mutation refers to a point mutation that changes a purine nucleotide to another purine or…

Q: For some DNAs, it is possible to separate the two strands, after denaturation,in a CsCl gradient.(a)…

A: Denaturation is a process in which proteins or nucleic acids lose the quarternary structure,…

Q: In one, simple sentence define the function of the following 1. Helicase  =  2. Alpha subunit of…

A: DNA helicases are essential during DNA replication because they separate double-stranded DNA into…

Q: How many possible nucleotide sequences are there for a stretch of DNA that is N nucleotides long, if…

A: A DNA nucleotide is composed of five-carbon sugar called deoxyribose, a phosphate group, and one of…

Q: Examination of the structure of DNA polymerases bound to nucleotide analogs reveals that conserved…

A: DNA polymerase is a member of a family of enzymes that catalyse the synthesis of DNA molecules from…

Q: The length of a DNA molecule is 680 nm when the DNA molecule is in B-conformation. How many helical…

A: The A-form & B-form are two possible conformations for DNA, the genetic material of living…

Q: A-DNA has a helix diameter of 25.5 Angstrom, a pitch per turn of 25.3 Angstrom, and a rise per base…

A: The A-DNA, B-DNA, and Z-DNA are the commonly occurring structural conformations of DNA. The most…

Q: Write a balanced equation for the hydrolytic deamination of a DNA- 5-methylcytosine residue.

A: Deamination is the process of breaking down amino acids in which amino group is converted into…

Q: All known DNA polymerases catalyze synthesis only in the 5' → 3' direction.  Nevertheless, during…

A: DNA replication is the process of making two identical copies of DNA. The process is carried by the…

Q: There are various types of DNA-targeting drug, including DNA alkylating agents, DNA intercalators…

A: Mutations are DNA errors that occur during life. A mutation is defined as any alteration in the DNA…

Q: Outline the key structural features of the DNA double helix.

A: DNA is the genetic element in all cell types of prokaryotic and eukaryotic. DNA is double stranded…

Q: If you analyze a double-stranded DNA molecule and find that 15% of all the nucleotide bases are…

A: According to Chargaff's rule, [A]+[G]=[C]+[T] where A - adenine G - Guanine C- Cytosine T- Thymine

Q: Explain the mechanism of trinucleotide repeat expansion.

A: Introduction: A trinucleotide repeat expansion is type of DNA mutation. In which, the trinucleotide…

Q: In NOT more than 200 words, explain how the double-helical structure of DNA suggests a mechanism for…

A: DNA replication: It is a process of producing two identical replicas of DNA for one original DNA.

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.