高二下英语语法

Promoter: enlightenment stage in RNA synthesis, RNA polymerase and specific areas of the template DNA, is refers to the RNA polymerase to recognize, and start a DNA sequence

Half reserved copy: DNA is made up of two DNA nucleotide chain, two chain by hydrogen bonds. In DNA replication, unwinding, two chain on a chain as a template, the synthesis of new chain, so the new synthesis of two strands of DNA, a new synthetic, is the mother of one is the original chain, so called a reserved copy

Asymmetric transcription: in RNA synthesis, just a chain of double-stranded DNA as a template, the template strand is not on the same single forever

Okazaki fragments: during the discontinuous synthesis of DNA with chain after the fragments generated, prokaryotic cells is 1000-2000 nucleotides in length, length of eukaryotes, 100-200 nucleotides.

Hyperchromic effect: when nucleic acid degeneration or reduce its ultraviolet absorption significantly enhanced

Hypochromic effect: when the degeneration of the nucleic acid under certain conditions to restore its original properties, and the strength of the ultraviolet absorption can be restored to the original level, called hypochromic effect

Enzyme active site (center) : the enzyme molecule and the substrate directly and make it into a product area

Molecular hybridization between different sections of DNA, if each other's complementary nucleotide sequence can also be irreversible, form a new double helix. This according to the complementary base pairing and make the incomplete complementary two polynucleotide process known as molecular hybridization combined with each other

Through photosynthesis, green plants chloroplasts use light energy to convert CO2 and H2O is converted into sugar, and O2 release process.

Structure domain: polypeptide chain on the basis of the structure of super second round to fold into further closely approximate spherical structure, has some biological function

Transcription factors: every transcription start necessary, but not any protein, RNA polymerase composition are defined as transcription factors

SD sequence: the mRNA upstream about 4-13 bases before starting password, there is a sequence that are rich in purines, said SD sequence.

Half a discontinuous copy: the synthesis of DNA polymerase is one-way 5 'to 3' direction and the DNA double bond are complementary parallel relationship, the direction from the starting point with the copy of the same child DNA synthesis is continuous said leading chain, in contrast to the