#Question id: 793
#SCPH05 I Biotechnology
What is the average size (in bp) of a mature t-RNA?
#Question id: 794
#SCPH05 I Biotechnology
A single-stranded DNA molecule contains 40 nucleotides with equal amounts of A, C, G, and T. This DNA strand can combine with a complementary DNA strand to form a double-stranded DNA molecule. Which structural feature is found in the single-stranded DNA molecule?
#Question id: 795
#SCPH05 I Biotechnology
A single-stranded DNA molecule contains 40 nucleotides and has the sequence 5’-(GA)20-3’. When this single strand binds to a complementary DNA strand,
#Question id: 796
#SCPH05 I Biotechnology
Which statement best describes the distinction between the purposes of the two RNAi pathways within the eukaryotic cell?
#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: 798
#SCPH05 I Biotechnology
Match the structural properties of DNA with the respective types of DNA in which they are found.
COLUMN – I COLUMN – II
A. Pitch per turn of helix 1. 45.6 angstrom
2. 24.6 angstrom
3. 33.2 angstrom
B. Helix packing diameter 1. 23.7 angstrom
2. 18.4 angstrom
3. 25.5 angstrom
C. Major-groove proportions 1. Flattened out on helix surface
2. Extremely narrow but very deep
3. Wide and of intermediate depth
D. Minor-groove proportions 1. Very broad but shallow
2. Extremely narrow but very deep
3. Narrow and of intermediate depth