A netlike array of protein filaments that maintains the shape of the nucleus.
The protein coat of a virus that encloses the nucleic acid.
Limit of resolution
The minimum distance between which two objects can be discriminated.
The distribution of electrons in an atom's electron shells.
Breeding of an organism of unknown genotype with a homozygous recessive individual to determine the unknown genotype.
The protective structure at each end of a eukaryotic chromosome. Specifically, the tandemly repetitive DNA at the end of the chromosome's DNA molecule. See also repetitive DNA.
The localized, repetitive coiling or folding of the polypeptide backbone of a protein due to hydrogen bond formation between peptide linkages.
A type of reproduction in which the offspring have unique combinations of genes inherited from the gametes of the two parents.
An individual who is heterozygous with one potentially harmful recessive allele
In prokaryotic DNA, a sequence of nucleotides near the start of an operon to which an active repressor can attach. The binding of the repressor prevents RNA polymerase from attaching to the promoter and transcribing the genes of the operon.