The spinal cord is part of the:脊髓是以下部分：
A. brain.
B. peripheral nervous system.
C. senses.
D. central nervous system.
查看答案
After a protein is synthesised in a ribosome:在核糖体中合成蛋白质后：
A. a transport vesicle may carry it to the Golgi apparatus.
B. a secretory vesicle carries it to the Golgi apparatus.
C. a transport vesicle carries it to a lysosome.
D. a secretory vesicle carries it to the plasma membrane.
E. the small and large ribosomal subunits join together.
Which of the following statements about DNA is false?下列关于dna的陈述是假的吗？
A. DNA is located in the nucleus.
B. DNA is double-stranded.
C. DNA contains base triplets.
DNA binds to ribosomes.
E. DNA is required for transcription.
The subunits of the ribosome are:核糖体的亚基是：
A. produced in the nucleolus.
B. produced in the cytoplasm.
C. the site of transcription.
D. where RNA polymerase is located.
E. produced in areas of euchromatin.
Connexons form a passageway between cells which allow communication to occur. Connexons在细胞间形成通道，使通信得以发生。
A. TRUE
B. FALSE
微信支付 
支付宝支付