Which vitamin is used for connective tissue formation?
a. B12
b. B1
c. A
d. E
e. K
B
Biology & Microbiology
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The ________ are drugs that deposit in developing teeth and cause a permanent brown discoloration.
A. tetracyclines B. penicillins C. streptomycins D. cephalosporins E. macrolides
Biology & Microbiology
Monomeric G proteins, such as Ras and several elongation factors, are usually in the active state when a molecule of _______ is bound to them.
a. GDP b. GTP c. ADP d. ATP
Biology & Microbiology
A lac repressor turns off the expression of the lac genes by
a. Binding to the promoter b. DNA polymerase c. Binding to the operator d. Binding to the lac genes
Biology & Microbiology
As ice melts
A) hydrogen bonds are broken. B) water molecules become less tightly packed. C) the water becomes less dense. D) heat is released.
Biology & Microbiology