#Question id: 1126
#SCPH01 Biochemistry
Which of the following statement(s) is (are) true of the α subunit of a G protein?
a. It physically associates with the receptor.
b. It binds GDP.
c. It binds GTP.
d. It is a transmembrane protein.
#Question id: 797
#SCPH05 I Biotechnology
With respect to microRNAs, which, if any, of the following statements, is FALSE?)
A. MicroRNA genes often occur in gene clusters within introns of protein-coding genes and are usually transcribed by RNA polymerase II.
B. Like an mRNA a miRNA is initially produced as a larger precursor RNA that, like the great majority of mRNAs, usually has a 5’ cap and a poly(A) tail.
C. MicroRNAs are produced by germ-line cells only.
D. A miRNA is initially produced as a duplex RNA but in order to work it needs to be converted into a single-strand RNA.
E. MicroRNAs usually work as transcription factors.
#Question id: 15729
#SCPH01 Biochemistry
#Question id: 4340
#SCPH01 Biochemistry
There is a mutation that is found in E. coli in the repressor that results in a molecule known as a super-repressor because it represses the lac operon permanently. Which of the following characteristics would you expect to observe in such a mutant?
#Question id: 60
#SCPH05 I Biotechnology
Which of the following is true for the reaction?
3H2 + N2 2NH3