Minor changes of HA are called
A: Gene mutation
B: Gene reassortment
C: Antigenic shift
D: Antigenic drift
A: Gene mutation
B: Gene reassortment
C: Antigenic shift
D: Antigenic drift
D
举一反三
- which of following do not belong to pathogenic variations of the endogenous genes ( ) A: gene amplification B: abnormal gene expression C: invasion of the foreign genes D: gene arrangement E: point mutation
- 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.
- Which<br/>of following can cause the great variation of influenza virus and<br/>wide epidemic: A: gene<br/>reassortment B: gene recombination C: transduction D: transformation E: conjunction
- Which<br/>of following can cause the great variation of influenza virus and<br/>wide epidemic:() A: gene<br/>reassortment B: gene<br/>recombination C: transduction D: transformation E: conjunction
- 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.
内容
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Among the following genes, ( ) is the housekeeping gene. A: Ribosomal protein gene B: Hemoglobin gene C: Insulin protein gene D: Ovalbumin gene
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1.以下哪几项属于中度重复序列（ ） A: rRNA gene B: tRNA gene C: ncRNA gene D: 组蛋白gene
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The observation that some genes are mosaics of other genes can be explained by ______. A: evolution B: drift C: exon shuffling D: gene duplication E: pseudogenes
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As a man sows, so he shall reap. Which trait of the gene is the proverb derived from? A: Copy B: Variation C: Mutation D: Deficiency
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基因治疗的策略包括（） A: 基因置换（gene replacement） B: 基因修正（gene correction） C: 基因转移（gene augmentation） D: 基因灭活（gene inactivation