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【单选题】
体外冲击波碎石适用于直径小于()结石A.
2.5cm
B.
3cm
C.
4cm
D.
5cm
E.
6cm
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举一反三
【多选题】What are the major concerns with germline gene editing?
A.
Some of the concerns raised about somatic gene transfer are related to the possibility that it could inadvertently lead to germline gene transfer. Germline gene transfer at the gamete and zygote stages have significant risks.
B.
Beyond the medical risks to the potential child, a number of long-standing ethical concerns exist regarding the possible practice of germline gene transfer in both human and nonhuman cases.
C.
Concerns involve issues ranging from the autonomy of future individuals to distributive justice, fairness, and the application of these technologies to "enhancement". Concerns related to eugenics and social justice and equal access to technologies.
D.
Unequal access and cultural differences affecting uptake could create large differences in the relative incidence of a given condition by region, ethnic group, or socioeconomic status.
【简答题】如图，在菱形ABCD中，∠BAD=2∠B，AB=6cm，则AC=（ ）cm。
【单选题】What is the primary objective of carrying out the Pine Gene Discovery Project?
A.
To speed up old-fashioned breeding methods.
B.
To identify all the genes in the pine tree's genome.
C.
To find out what desired traits the pine trees have.
D.
To make it easier to know which gene needs altering.
【单选题】The cI gene of phage is of what type?
A.
Repressor
B.
Inducer
C.
Promoter
D.
Silent gene
【多选题】What are the major hurdles for the success of gene therapy?
A.
Short-lived nature – Before gene therapy can become a permanent cure for a condition, the therapeutic DNA introduced into target cells must remain functional & the cells containing the therapeutic DNA must be stable. Problems with integrating therapeutic DNA into the genome & the rapidly dividing nature of many cells prevent it from achieving long-term benefits. Patients require multiple treatments.
B.
Immune response – Any time a foreign object is introduced into human tissues, the immune system is stimulated to attack the invader. Stimulating the immune system in a way that reduces gene therapy effectiveness is possible.
C.
Multigene disorders – Some commonly occurring disorders, such as heart disease, high blood pressure, Alzheimer's disease, arthritis, & diabetes, are affected by variations in multiple genes, which complicate gene therapy.
D.
Some therapies may breach the Weismann barrier (between soma and germ-line) protecting the testes, potentially modifying the germline, falling afoul of regulations in countries that prohibit the latter practice.
【单选题】What is the main purpose of writing this passage?
A.
Expressing the writer's idea that gene technology will benefit people.
B.
Telling people the advantages and disadvantages of gene technology.
C.
Telling the readers that gene technology will not benefit people.
D.
Explaining that gene technology will also do harm to the humanity.
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