Bio 240: Anatomy & Physiology 1 Lecture Ex#1 Sumer 2017 last tr Dr. Precious Ala
ID: 275894 • Letter: B
Question
Bio 240: Anatomy & Physiology 1 Lecture Ex#1 Sumer 2017 last tr Dr. Precious Alann 43. A sequence of three nucleotides on mRNA silt A an anti-codon B. an amino acid C. an exon D. a codon 44. The initiator tRNA always brings the amino aciž A. AUG C. release factor D. glycine 45. Which of the following occurs as a result of nibosomal translocation? A. The iRNA that was in the P site stays in the P site, while all other tRNAs translocate. B. The tRNA that was in the A site moves into the E site C. The tRNA that was in the A site moves into the P site D. The tRNA that was in the E site moves nto the P site 46. The toxin ricin rapidly and completely deactivates the nbosome. It is lethal so bumans, because i will A inhibit protein folding B. imhibit transcription C. inhibit RNA processing after transcription D. inhibit translation 47. Predict the meaning of the term "reverse transeription." A synthesis of RNA using DNA as a template B. synthesis of DNA using RNA as a template C. synthesis of RNA using RNA as a template D. synthesis of proteins using RNA as a template 48. Splicing causes A a poly(A) tail to be added B. the exons to join back together C a cap to be added D. the introns to join back together 49. Transeription factors bind to the on DNA A. terminator sequence B. start codon C nontemplate strand D. promoter sequence 50. Which of the following is an example of posttranslational modification A mutation B. proteolysis C. glycosylation D, intron removalExplanation / Answer
Answer 43. Option d
These codons are read by the anticodons that are present on the tRNA.
Answer 44. Option b
It is always the first amino acid to be synthesised.
Answer 45. Option Part C, because the Aminoacyl site or A site has to be vacated everytime for the new amino acid.
Answer 46. Option c
Ricin basically prevents splicing and further translation too.
Answer 47. Option b
It is done in HIV virus using reverse transcriptase enzyme.
Answer 48. Option b
In splicing, introns are removed, and exons are joined together, this functional transcript will undergo translation.
Answer 49. Option d
Transcription factors are the proteins that help in the transcription.
Answer 50. Option c
Glycosylation occurs in golgi body whereby carbohydrate groups are added to the primary polypeptide chain.
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