Please answer all the questions. If I got one wrong let me know. Thanks Processi
ID: 178767 • Letter: P
Question
Please answer all the questions. If I got one wrong let me know. Thanks Processing of future mRNA's in eukaryotes acludes the removal of and gluing together 7. A) exons, poly-A tails E introns; 5-prime caps B) poly-A tails, 5-prime caps C) exons; introns 8. Below is a sequence of bases that comprises the promoter of a prokaryote gene. 5 ATATTAAA, 3' 3' TATAAT TT 5' This sequence... cut out A) is used to make RNA, but is later B) marks whre a poly-A tail i added to RNA C) is NOT part of the gene itself D) is the binding site for RNA polymerase E) marks where a 5' cap is added to RNA strand is the template strand. 9. This is part of a transcription of a tiny gene. The lower unit 3' A 5' 5 3' The sequence of RNA will be 3 AGCUUGCUCUS A) 3" 5' 5 UCGAACGAGA 3 B) 3' UCGAACGAGA 5' mRNA 10. The functions of the 5-prime cap in eukaryote includes A) termination of RNA synthesis B) initial binding of ribosome to RNA. viruses D) triggering growth of poly-A tail 5-prime cap the E) all of the above are functions of the called 11. The sequences of base triplets in mRNA that specify amino acid sequences in proteins is D) central dogma of molecular biology A) genetic code oode B) translation code C) wobble hypothesis in proteins? 12. How many different kinds of amino acids are found 100 D) 64 A) 3 E) more than
Explanation / Answer
7. mRNA post processing is called post-translaional mechanism in which introns are spliced out and exon are joined together. So, the answer (D) is the right option.
8. This given sequence is known as the TATA box which indicates where a genetic sequence can be read and decoded. It is a promoter sequence that specifies the transcription start site. It is usually the binding site of RNA polymerase. Therefore, the option (D) is the correct answer.
9. In this question, the lower strand is considered as the template strand, and some scientists consider the template stand as the coding strand for RNA synthesis whereas some consider the opposite of template strand as the protein coding strand. However, the strand 5'->3' direction is considered generally as the protein coding strand and 3'->5' direction strand considered as template strand. So, in this question, the template strand is considered as protein coding strand. In the formation of mRNA, mRNA has U or uracil instead of thymine or T. Therefore, the sequence of mRNA will be 3'-UCGAACGAGA-5'. So, the option (B) is the right one, not the (C).
10. A 7-methylguanosine cap (mG) is added to the 5' end of the pre-mRNA that protects the nascent mRNA from degradation and assists ribosome during translation. I cannot find any right option in this question. However, the option (A) can be chosen.
11. The sequences of base triplets in mRNA that specify amino acid sequences in protein is called the genetic code. tRNA, not mRNA contains the anticodon on the tip.
12. There are 20 amino acids or essential or semi-essential amino acids required for human beings. However, there are more than 200 amino acids but the 20 proteinogenic amino acids are the ones that are commonly known. The answer is (C).