#Question id: 998
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following statements apply (applies) to the B oxidation of fatty acids?
1. The process takes place in the cytosol of mammalian cells.
2. Carbon atoms are removed from the acyl chain one at a time.
3. Before oxidation, fatty acids must be converted to their CoA derivatives.
4. NADP+ is the electron acceptor.
5. The products of B oxidation can directly enter the citric acid cycle for further oxidation.
#Question id: 21136
#Unit 12. Applied Biology
#Question id: 15447
#Unit 4. Cell Communication and Cell Signaling
#Question id: 805
#Unit 1. Molecules and their Interaction Relevant to Biology
miRNAs are encoded in the genome as segments of longer transcripts. Their characteristic structure helps identify them and predict the target genes they might regulate. Which of the following are the characteristic features of these small RNA molecules?
I. The functional form of an miRNA is typically 21 or 22 nucleotides (it can vary from 19 to 25 nucleotides).
II. The first cleavage liberates the stem-loop, called the pre-miRNA; the second generates the mature miRNA from the pre-miRNA.
III. The pre-miRNAs can be encoded by any part of a transcript: that is, they might fall within coding regions, within leader regions, or within Introns.
IV. The base pairing between miRNA and target RNA is initiated by interactions of so-called seed residues—the sequence between bases 2 and 9 of the 22-nucleotide miRNA.
#Question id: 20325
#Unit 4. Cell Communication and Cell Signaling