The amount of energy in a system that cannot be used to perform work is referred to as ____
Fill in the blank with the appropriate word.
Answer Key: entropy
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The clustered, regularly interspaced short palindromic repeats (CRISPR) system in bacterial cells has been called the "immune" system of bacteria. CRISPR protect bacteria from a repeat infection from the same phage because bacterial cells
A. recognize proteins on the surface of the phage and secrete enzymes that digest the phage. B. recognize proteins on the surface of the phage and secrete proteins that block the binding of the phage. C. integrate fragments from the phage DNA in their own chromosomes and target for destruction any DNA that contains the same fragments in the future. D. modify the attachment sites for the phages so that new infections cannot take place.
What type of regulatory transcription factor binds DNA and increases the transcription of a gene?
A. a repressor exerting negative control B. a repressor exerting positive control C. an activator exerting negative control D. an activator exerting positive control E. a combination of both a repressor and activator exerting negative control
Four of the five answers listed below are secreted by an exocrine gland. Select the exception
a. wax b. saliva c. hormone d. milk e. mucus
Lupus is a disease in which the immune system produces antibodies that attach to various tissues throughout the body, which initiates massive inflammation and tissue death
What type of disease is this, and what sort of treatment may prove effective?