At 10 weeks, the blastocyst becomes an embryo
Indicate whether the statement is true or false
FALSE
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Marceau is studying small single-celled organisms that contain phospholipid membranes. These organisms can be broadly classified into the domain:
A. Bacteria B. Animalia C. Fungi D. Protista
Eukaryotic cells import large molecules through the process of ____ and secrete larger molecules by
____.
a. endocytosis; exocytosis b. diffusion; exocytosis c. exocytosis; endocytosis d. endocytosis; phagocytosis e. phagocytosis; pinocytosis
In order to infect a cell, a virus must
A. have a special protein on its surface that can interact with a protein receptor on the surface of the host cell. B. produce a special extension of its cytoplasm when it comes into contact with the appropriate host cell. C. inject its protein into the cell while the nucleic acid remains attached to the host cell surface. D. active burrow through the cell wall or cell membrane of the host cell to reach the cell's nucleus.
Which one of the following forms a bilayer structure that is found in cell membranes?
A) triglycerides B) amino acids C) cholesterol D) phospholipids E) saturated fats