Which viral proteins help influenza bind to and enter a host cell? 

A. Membrane protein M2 and nucleoprotein
B. Nuclear export protein and nucleoprotein
C. PB1, PB2, and PA
D. Hemagglutin and neuraminidase


Answer: D

Biology & Microbiology

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The number one worldwide infectious diseases are ________.

A. respiratory diseases B. AIDS-related diseases C. malaria and other protozoan diseases D. measles and other rash diseases E. diarrheal diseases

Biology & Microbiology

Which one of the following statements CORRECTLY describes the architecture of a plasma membrane?

A) Proteins line the internal, cytoplasmic surface, and phospholipids cover the external surface. B) Proteins, phospholipids, and cholesterol are joined by strong covalent bonds that give the membrane strength. C) Phospholipids line the internal cytoplasmic surface, and proteins cover the external surface, sandwiching cholesterol in the middle. D) Proteins and cholesterol are embedded in the phospholipid bilayer, forming a fluid mosaic.

Biology & Microbiology

Plant species A has a diploid number of 12. Plant species B has a diploid number of 16. A new species, C, arises as an allopolyploid from A and B. The diploid number for species C would probably be _____

A) 14 B) 16 C) 28 D) 56

Biology & Microbiology

This febrile disease with a rash has a pathogen that can cross the placenta and cause serious fetal damage:

A. croup B. mumps C. influenza D. measles (rubeola) E. rubella

Biology & Microbiology