福师11春学期《分子生物学》在线作业一（Fu Chun division 11 spring semester molecular biology online homework）.docVIP

福师11春学期《分子生物学》在线作业一（Fu Chun division 11 spring semester molecular biology online homework） Fu Chun division 11 spring semester molecular biology online homework First, a radio question 1. binding of zinc finger protein with zinc A. is covalent; B. must have the presence of DNA; C. is coordinated by conserved cystine and histidine residues; D. is located in the alpha helix region of the protein The correct answer: C 2. HLH protein () The sequence composition of A. is related to the helix helix helix of prokaryotes; B. combines with DNA through the ring region; C. forms two alpha helices combined with the large groove of DNA; D. consists of an amphipathic helix in which the hydrophobic residue is located on one side of the helix; No more than E. The correct answer: D 3. the length of the eukaryotic mRNA precursor consists of () The stem loop structure formed by the transcription termination site of A. determines its structure; B. is determined by the polyadenylation site at its 3 end, where transcription products are cleaved and added to the poly; Termination of C. at termination sites is associated with RNA polymerase II binding proteins; D. exonuclease all processing initial transcripts into the final length of the pre mRNA decision; E. capping, polyadenylation, and splicing of introns are determined The correct answer: B 4.1953 years, Watson and Crick proposed: () The A. chain of DNA acid is connected by hydrogen bonds into a double helix; The replication of B. DNA is semi reserved, often forming a parent offspring double helix heterozygous chain; C. three consecutive nuclear acids represent a genetic code; D. genetic material is usually DNA, not RNA; E. was isolated from the mutant and showed that the mutation was not a deletion mutation The correct answer: A 5. select all the correct statements about snRNA: () A. snRNA is located only in the nucleus; B. most snRNA are high abundance; C. snRNA is highly conserved during evolution; D. some snRNA can base pairing wi