1. A guanine triphosphate nucleotide that binds to the 5' end of the mRNA thus increasing the stability of the synthesized RNA and enhancing translation efficiency is called a :   poly-A-tail   Cap   leader   trailer   Hint Half-n-half Clue   2. A base sequence that is part of the DNA of an organism and appears to have once coded a gene product, such as a protein or transcription factor but no longer does so is called :   An Oncogene   A selfish gene   A jumping gene   A pseudogene   Half-n-half Clue   3. The base sequence of the RNA strand transcribed from a DNA strand of the sequence T-G-C-A-G-C-A-C-A is :   A-C-G-U-C-G-U-G-U   A-C-G-U-C-G-U-G-U   U-G-C-A-G-C-A-C-A   G-U-A-C-U-A-C-A-C   Half-n-half Clue   4. A segment of DNA that includes regions preceding and following the coding DNA ( introns as well as exons ) is called :   operon   retroposon   cistron   transposon   Half-n-half Clue   5. The series of three consecutive mRNA bases coding for one specific amino acid in a protein is called a :   intron   exon   codon   transposon   Half-n-half Clue   6. A RNA transcript (whose base sequence is complementary to that of the mRNA of a gene) that can inhibit the expression of a gene by forming a duplex with the mRNA strand is called :   antisense RNA   tRNA   dsRNA   rRNA   Half-n-half Clue   7. The bacterial promotor sequence usually found at the -10 position (ten base pairs upstream of the transcription start site) is :   TTGACA   TATTAT   TATAAT   TAGACA   Half-n-half Clue