Which of the following is NOT true of prokaryotes?
A. They lack a membrane-bound nucleus.
B. DNA is located within the cytosol.
C. They have a simpler structure relative to eukaryotes.
D. They possess membrane-bound organelles.
E. They are relatively small compared with eukaryotes.
D. They possess membrane-bound organelles.
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Which of the following is true of the structure
labeled "B"? a. It is composed of tubulin subunits. b. It is composed of actin subunits. c. It is a microtubule. d. It is an intermediate filament. e. It is found in cells that give rise to nails and hair.
An adenovirus
a. is a naked virus. b. does not have a lipid envelope. c. has a spiked protein coat. d. infects animals. e. all of these.
Which of these pairs is correctly matched?
A) IgE: typically structured as a pentamer B) IgG: first immunoglobulin produced in a primary immune response C) IgM: readily crosses the placenta to protect the fetus/newborn D) IgA: found in secretions such as colostrum, tears, and mucus
Cephalopods are the only mollusks that have a closed circulatory system
Indicate whether the statement is true or false