Joy took the notes shown below while learning about cells. Forms boundary between a cell and the outside environment • Controls the movement of materials into and out of the cell • Consists of double layer of phospholipids She forgot to write the name of the cell structure that her class was studying that day. What structure is described in her notes?
A. endoplasmic reticulum
B. cell membrane
C. cell wall
D. nucleus
B. cell membrane
You might also like to view...
One function of sphincter muscles is to
a. control the passage of food through the GI tract b. secrete digestive juices into the GI tract c. control peristalsis d. trigger hormone release e. grind large food particles
Ubiquitin ____.
A. targets proteins for degradation and post-translational processing. B. targets proteins for degradation. C. targets proteins for post-translational processing. D. is attached to improperly folded proteins. E. is attached to improperly folded proteins and targets them for degradation.
The process of sporangium formation and endospore maturation requires 6-8 hours. What is most likely to result if the temperature of the environment was raised to 100°C about 2 hours after the process started?
A. The endospore would not form properly because it is not yet heat resistant. B. The chromosome in the endospore would likely carry mutations. C. The organism would be termed a hyperthermophile. D. The endospore would form more slowly and be heat resistant. E. The endospore would form properly but would be unable to germinate.
A transposon is a DNA sequence that “jumps” into the middle of a gene
__________________ Indicate whether the statement is true or false.