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皮皮学刷刷变学霸
举一反三
【判断题】The misfolded prion form of a protein can convert the properly folded version of the protein in an infected brain into the normal conformation. This allows the misfolded prions, which tend to form agg...
A.
正确
B.
错误
【简答题】在锻造生产中,金属的塑性大和变形抗力(),则其锻造性好。
【单选题】Plant cells are usually 10 to 100 μm in diameter—larger than animal cells, which typically range from 5 to 30 μm. Assume a human cell is a ball and its mass is 2.1 ng. Its density is 1.04 g/mL. Calcul...
A.
11.7 μm
B.
13.7 μm
C.
15.7 μm
D.
16.7 μm
【判断题】The resting membrane potential of a typical animal cell arises predominantly through the action of the Na-K pump, which in each cycle transfers 3 Na ions out of the cell and 2 K into the cell, leaving...
A.
正确
B.
错误
【简答题】请翻译此段: All eukaryotic cells have a cytoskeleton, which is a convoluted latticework of filaments and tubules that appears to fill all available space in the cell and provides support for various other...
【简答题】在锻造生产中,金属的塑性( )和变形抗力( ),则其可锻性好。
【单选题】A chromosome is a part of a cell in an animal or plant. It contains genes which determine what characteristics the animal or plant will have.
A.
time
B.
color
C.
nucleus
D.
colon
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