The Golden Age of Medical Microbiology
A. occurred during the late 1800s to early 1900s.
B. started in the 1990s with the advent of genetic engineering.
C. is a time when the knowledge of and techniques to work with bacteria blossomed.
D. was when people realized that diseases could be caused by invisible agents.
E. occurred during the late 1800s to early 1900s, is a time when the knowledge of and techniques to work with bacteria blossomed AND was when people realized that diseases could be caused by invisible agents.
E
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Identify the point in time during an action potential when a positive feedback process is occurring in a neuron.
A. when the neuron is at rest B. as the neuron is being depolarized and passes the threshold potential C. after the peak depolarization of the action potential when it is rapidly repolarizing D. during the undershoot phase when the neuron is slightly hyperpolarized relative to the resting potential E. A positive feedback process is occurring at all the time points given.
The Na+/K+ pump transports ____
a. 2 sodium ions in and 2 potassium ions out b. 2 sodium ions in and 3 potassium ions out c. 2 sodium ions out and 3 potassium ions in d. 3 sodium ions in and 2 potassium ions out e. 3 sodium ions out and 2 potassium ions in
The DNA components adenine, thymine, guanine, and cytosine are examples of ____
a. phosphates b. sugars c. bases d. genes e. ribosomes
Which of the following is not a characteristic of cancerous cells?
A) immortality B) contact inhibition C) unusual shapes and sizes D) All of the above are characteristics of cancerous cells.