Gene chip is formed by fixing a large number of DNA probes with known sequences on the surface of a microscope carrier. Is this tool most useful for the following experiments?()
A. Predicting the presence of specific metabolites in cells
B. Comparison of newly synthesized nuclear RNA and cytoplasmic RNA to locate introns
Compare RNA produced under two different physiological conditions to understand gene expression profile
D. Compare the proteins expressed under two different physiological conditions to understand their functions
Evaluate gene linkage
查看答案
Nucleic acid was first found by ()
A. Boysen Jensen
B. Friederich Meischer
C. Johansen
D. Went
Here is a mRNA of prokaryote. 5'-GGCGAAC()GAGGCTAGAUGCACCCUUCGCAGUACGU-3'. The order of the codon to be translated is().
A. -AUG-ACG-CUU-CCC-ACG-UAG-CTA-
B. -AUG-GAG-GCT-AGA-UGC-ACC-CUU-CGC-AGU-ACG-
C. -AUG-UUC-GCC-
D. -CTA-GAU-GCA-CCC-UUC-GCA-GUA-CGU-
E. -AUG-CAC-CCU-UCG-CAG-UAC-
TrmB protein can bind to the promoter region of malE gene,trehalose can bind to trmB protein.In the presence of trehalose, the binding of trmB protein to male gene was inhibited and the malE gene was transcribed.So we can know that trmb protein is a()?
A. Inducer
B. Positive control protein
C. Operon
D. Repressor
E. Repressor gene
The following repair methods only work when pyrimidine dimer is produced()
A. Photoreactivation repair
B. Excision repair
C. Recombination repair
D. SOS repair
E. Mismatch repair
微信支付 
支付宝支付