福师11春学期《分子生物学》在线作业一（Fu shis molecular biology online work one in spring semester）.doc
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福师11春学期《分子生物学》在线作业一（Fu shis molecular biology online work one in spring semester）
Fu shis molecular biology online work one in spring semester
One, single choice
1. The combination of zinc finger protein and zinc ()
A. it is covalent;
B. There must be DNA;
C. Coordinated by conservative cysteine and histidine residues;
D. The alpha - spiral region of the protein
Correct answer: C
2. HLH protein ()
A. The correlation between the sequence composition and the prokaryotic spiral - helix - helix.
B. The combination of the ring and DNA;
C. The formation of two alpha-helixes combined with the great cleavage of DNA;
D. By forming a sexual spiral, of which the hydrophobic residues are located on the side of the spiral;
E. None of the above
Correct answer: D
3. The length of the precursor of the eukaryotic cell mRNA is ()
A. The stem loop structure formed by the transcription termination site determines it;
B. The polyadenylic acid site at the end of its 3 terminates, the transcription product is cut at this site and adds poly;
C. at a termination site with RNA polymerase Ⅱ termination protein decision;
D. It is determined that all initial transcription products are processed into a precursor mRNA of the final length.
E. Cap, polyadenylic acid and splicing of introns
Correct answer: B
In 1953, Watson and Crick proposed:
A. The DNA strand of polykaryotic acid is connected by hydrogen bonding to A double helix;
B. The replication of DNA is semi-reserved, often forming the parent - subgeneration double spiral hybrid chain;
C. three consecutive nucleoic acids represent a genetic code;
D. genetic material is usually DNA, not RNA;
E. separate to the response mutant to prove that the mutation is not a missing mutation
Correct answer: A
5. Select all correct statements about snRNA: ()
A. snRNA is only in the nucleus;
B. Most snRNA is of high abundance;
C. snRNA is highly conservative in its evolution;
Some snRNA can pair with conservative sequences in introns;
E. all of the above is
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