How do flagella bend?
a. myosin motor proteins slide microtubules over each other
b. dynein motor proteins slide microtubule doublets over each other
c. myosin motor proteins slide actin filaments over each other
d. microfilaments contract due to the action of kinesin
e. actin filaments contract due to the action of myosin
ANSWER: b
You might also like to view...
An operon is:
A. a gene coding for a repressor protein. B. a region of DNA consisting of the promoter, operator, and coding sequence for structural proteins. C. a region of DNA consisting of the operator and coding sequence for structural proteins. D. a region of DNA consisting of the promoter and operator sequences needed to regulate one or more structural genes. E. a single molecule of RNA coding for more than one protein.
What are on the surface of most vertebrate cells, acting as markers of "self"?
A. major histocompatibility complex proteins B. T-cell receptors C. antigens D. immunoglobulins
The above figure represents a plant structural
feature with which of the following functions? a. reproduction b. gas exchange c. water conservation d. water transport e. both gas exchange and water conservation
What is a prophage?
a. It is a bacterial cell about to lyse. b. It is an underdeveloped lytic virus. c. It is phage DNA that is integrated into viral DNA. d. It is phage DNA that is integrated into bacterial DNA. e. It is when the phage is attached to the cell surface of the bacterium.