Which of the following is similar between erythrocytes and lymphocytes?
a. They are both components of the plasma.
b. They both have roles in immune response.
c. They are both produced from stem cells.
d. They both carry hemoglobin.
Answer: c. They are both produced from stem cells.
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In what way do the membranes of a eukaryotic cell vary?
A) Phospholipids are found only in certain membranes. B) Certain proteins are unique to each membrane. C) Only certain membranes of the cell are selectively permeable. D) Only certain membranes are constructed from amphipathic molecules. E) Some membranes have hydrophobic surfaces exposed to the cytoplasm, while others have hydrophilic surfaces facing the cytoplasm.
In plant cells, DNA molecules are found inside which structures? (Select all that apply.)
A) the nucleus B) the mitochondrial matrix C) the chloroplast stroma D) the cytoplasm E) the space between the inner and outer mitochondrial membranes
A South San Francisco child enjoyed bath time at his home because of the colorful orange and red water
The water did not have this rusty color at its source, and the water department could not culture the Thiobacillus bacteria responsible for the rusty color from the source. How were the bacteria getting into the household water? What bacterial structures make this possible?
A solution is at equilibrium across a plasma membrane. If 50 molecules were to enter the cell, how many molecules would need to exit the cell in order to maintain the equilibrium?
A. 50 B. 100 C. 75 D. 25 E. 0