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Researchers report that obesity relates to DNA. Some children get obese【C1】______they lack particular chunks of DNA, which kicks
Researchers report that obesity relates to DNA. Some children get obese【C1】______they lack particular chunks of DNA, which kicks
admin
2013-06-17
39
问题
Researchers report that obesity relates to DNA. Some children get obese【C1】______they lack particular chunks of DNA, which kicks their hunger into overdrive.
The British researchers【C2】______the DNA of 300 children who’d become very fat by age 10. They found【C3】______that several rare deletions may promote obesity, including one kind they found in【C4】______than 1% of about 1 200 severely obese children. That【C5】______, on chromosome (染色体) 16, apparently causes trouble because it【C6】______a gene that the brain needs to【C7】______to the appetite-controlling hormone leptin (瘦体素), said Dr. Sadaf Farooqi of Cambridge University. Children with a chromosome 16 DNA deletion have a very strong【C8】______to eat.
The work has already produced a real-world【C9】______Farooqi said four children with the chromosome 16 deletion had【C10】______drawn the attention of British child welfare authorities, who blamed the parents【C11】______overfeeding them. "We were able to【C12】______" and get the parents of two children off the hook, and the other two cases are【C13】______discussion, she said. That’s happened before the scientists uncovered【C14】______causes for severe childhood obesity, she said. "It’s a slightly【C15】______outcome of our research, but one we think is very important," she said.
【C16】______scientists had previously discovered particular genes that promote obesity when damaged, the new work looked at【C17】______chunks of DNA that can span several genes.
Eric Ravussin, an obesity expert, who wasn’t【C18】______in the study, said the work provides "a gold mine of information". That’s because it【C19】______specific chromosome areas that scientists can explore to【C20】______obesity-related genes, he said.
【C7】
选项
A、contribute
B、apply
C、commute
D、respond
答案
D
解析
固定搭配题。此处that引导的定语从句修饰名词gene,根据上文可知,这个被移除的基因与控制食欲的瘦体素有关,respond(to)“对……有效”符合句意,为正确答案。contribute(to)“有助于;导致”,apply(to)“应用于”和commute(to)“乘车往返于”均不符合句意。
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0
大学英语四级
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