When a product binds to an allosteric enzyme to slow its reaction, it does which of the following?
A) binds to the active site, blocking the binding of substrate
B) binds to the substrate, blocking its binding of the active site
C) binds to the product production site, stopping the production of product
D) binds to a site other than the active site, changing the shape of the active site and decreasing the binding of substrate
Answer: D
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As stimulation time increases, the scorpion's respiratory rate begins to decline. This decline is probably due to
a. muscle cells running low on ATP. b. muscle cells running low on O2. c. lactate build-up in the muscle cells. d. all of the above answers.
Antibodies detected by reacting rickettsial antigens with specific antibody followed by use of an anti-immunoglobulin with a fluorescent tag could be used to diagnose:
A) Rocky Mountain spotted fever B) Mycoplasma pneumonia C) stomach ulcers D) rheumatic fever
The prenatal period begins with the ____ and ends after ______.
A. zygote; birth B. blastocyst; gastrula C. embryo; fetus D. fetus; infant E. zygote; fetus
Which of the following contains introns?
a) eukaryotic hnRNA b) eukaryotic mRNA c) prokaryotic DNA d) prokaryotic mRNA