A: muffle
B: intuition
C: gene
D: tent
举一反三
- elieve in _________ love A: gene B: intuition C: figure D: perpetual
- A gene knock-in (or knock-in) refers to a genetic engineering method that involves the one-for-one substitution of DNA sequence information in a genetic locus or the insertion of sequence information not found within the locus. A gene knock-in therefore can be seen as a gain of function mutation and a gene knockout a loss of function mutation, but a gene knock-in may also involve the substitution of a functional gene locus for a mutant phenotype that results in some loss of function.
- Operon do not include( ): A: promoter B: regulatory sequence C: operator D: structural gene E: trans-acting factor
- Which of the<br/>following statements about non-coding DNA is wrong? () A: DNA sequence of non-coding protein. B: DNA sequence of non-coding RNA and protein. C: DNA sequence participating in the regulation of gene expression, but<br/>not coding protein. D: Relate to genome protection.
- In the followings, which do you think are parts? A: reporter gene B: replicon C: restriction site D: selective marker E: primer sequence
内容
- 0
Which gene transfer technique involves a tiny needle which is used to inject DNA into a cell lacking that DNA sequence
- 1
Coding sequence of microRNAs may be present in the introns of split gene, and it can also exist in the intergenic non-coding regions. A: 正确 B: 错误
- 2
What about inserting a base into the coding region of a gene？ A: No impact B: It will change all amino acid sequences of the protein downstream of the insertion point C: Depending on the insertion point, it may have different effects on the protein D: An amino acid will be inserted into the protein sequence E: Three amino acids will be inserted into the protein sequence
- 3
Among the following genes, ( ) is the housekeeping gene. A: Ribosomal protein gene B: Hemoglobin gene C: Insulin protein gene D: Ovalbumin gene
- 4
The creation of a stop codon in the middle of a coding sequence<br/>within the gene is a:() A: missense<br/>mutation; B: frameshift<br/>mutation; C: nonsense<br/>mutation; D: point<br/>mutation; E: silent<br/>mutation.