Suppose it takes 12 hours for a bacterium to complete 1 generation, when you culture 100 cells for 2 days, how many bacterial cells you can get theoretically?
A. 400
B. 800
C. 1600
D. 3200
查看答案
Which receptors of the influenza virus are responsible for binding to the host cell?
A. hemagglutinin
B. type A
C. neuraminidase
D. capsid proteins
The general steps in a viral multiplication cycle are
A. adsorption, penetration, synthesis, assembly, and release
B. endocytosis, replication, assembly, and budding
C. adsorption, duplication, assembly, and lysis
D. endocytosis, penetration, replication, maturation, and exocytosis
Which phase of a fungal life cycle is best adapted to growing in a host's body?
A. yeast
B. hyphal
C. conidial
D. filamentous
What property of the retroviruses enables them to integrate into the host genome?
A. the RNA they carry
B. presence of glycoprotein receptors
C. presence of integrase
D. a positive-sense genome