Molecular Biology and Biochemistry

It inhibits the subunit of DNA gyrase and induces formation of relaxation complex analogue.

It is the redundancy of genetic code. Tryptophan is specified by the codon UGG.

Enhancer is a short segment in DNA that can be bound by proteins to enhance transcription of genes. Z DNA, which is left handed, is usually found in the enhancer sequence.

It is absent in histones.

Glucose-6-phosphatse hydrolyses glucose 6 phosphate into free glucose and phosphate group. This enzyme is absent in brain due to which gluconeogenesis does not occur in brain.

It is also known as RNA dependent DNA polymerase. It is a DNA polymerase that transcribes single stranded RNA into single stranded DNA. It is also a DNA dependent DNA polymerase, which synthesizes a second strand of DNA complementary to the c-DNA. In eukaryotic cell, telomerase is an example of reverse transcriptase.

H1 histone keeps in place the DNA, which is wrapped around the nucleosome. It is responsible for high order chromatin structure. In high order chromatin structure,  assemblage of  nucleosomes occurs.

ATP binding cassette transporters are transmembrane proteins that utilize the energy of ATP hydrolysis to carry out translocation of various substrates across membranes. It is also involved in eukaryotic development of resistance to multidrugs.

5' capping protects messenger RNA and provides stability, which is able to undergo translation.

RBCs take glucose through facilitated diffusion and not by active transport.

It is an electromagnetic attractive interaction of a hydrogen atom and an electronegative atom such as nitrogen, oxygen, fluorine that comes from another molecule or chemical group.

Recombinant dependent mechanism takes place after DNA replication. Hence, it is considered post replication repair.

RBCs take glucose through facilitated diffusion and not through active transport.

It is a poisonous cardiac glycoside. It binds and inhibits sodium potassium pump. Ouabain are used to stimulate the heart muscle. They work by binding to the Na⁺/K⁺ ATPase and inhibiting its action. The result of this is that Na⁺ leaks back into the cell. When this happens, the cell tries to maintain the osmotic balance pumping the sodium out with the Na⁺/Ca²⁺ pump. This pumps Ca²⁺ into the cell, which triggers muscle contraction.

Phosphatidylserine is involved in programmed cell death, which is called apoptosis.