Question

13. What would be the MOST likely effect of mutating the consensus sequence found at the 5' splice site of an intron? 1. A longer than normal mRNA would be produced. 2. A shorter than normal protein would be produced. 3. A longer than normal DNA would be produced. 4. Transcription would terminate prematurely. 5. Replication would be shorter than normal. 26. An mRNA has the codon 5' UAC 3. What tRNA anticodon will bind to it? 1. 5' CTA 3' 2. 5' CAU 3' 3. 5' ATC 3' 4. 5' AUG 3 5. 5' GUA 3' 28. Which of the following chemical or structural characteristics of RNA is different from those of DNA? (Select all that apply) 1. RNA nucleotides are generally less chemically stable than DNA. 2. RNA is usually a single-stranded molecule instead of a hydrogen-bonded double strand like DNA. 3. The bases in RNA include uracil instead of thymine. 4. The 2'-carbon of ribose has an H, unlike the OH in that position of deoxyribose. 5. The RNA sugar is ribose instead of deoxyribose. 40. A sclentist is studying a gene known as the XYZ gene in eukaryotes. Into a eukaryotic cell, she inserts an miRNA that is complementary to a portion of the XYZ mRNA found in the cell. What result would you predict? 1. 2. 3. 4. There will be a decrease in the amount of XYZ protein made. There will be a decrease in the transcription of the XYZ gene. There will be an increase in the amount of XYZ protein made. There will be an increase in the transcription of the XYZ gene.

please help with these. if you answer all of them I'll be sure to give a thumbs up.
please explain them so I can understand them, especially 28 and 26. thanks!

Answer 1

I believe the correct answers to be as follows:

13) 1) A longer than normal mRNA would be produced.

26) 5) 5' GUA 3'

Because anticodon needs to be complimentary to the codon itself, so if you reverse this sequence because 5' of the codon needs to bind with 3; of the anticodon, you would get the attachment like this:
5' GUA 3' (Anticodon)
3' CAU 5' (Codon)

28) 1,2,3 and 5
RNA is less stable as it has an hydroxyl group at 2' location which makes it more reactive.
Rest of the options that are correct are just facts.

40)1) There will be a decrease in the amount of XYZ protein made.

feel free to leave a comment down below for any further query. good rating would be appreciated if you find my answer helpful. thank you.