1) How does position effect influence gene expression? a) Translocations may res
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Question
1) How does position effect influence gene expression?
a) Translocations may result in a promoter that is normally used for one gene now controlling an entirely different gene.
b) Since this mechanism relies n recombination it relies on the positioning of one allele so that it is under the control of the other allele.
c) Translocations always result in a gene being recombined into an area of heterochromatin.
2) A tRNA that has an amino acid attached is called
a) a degenerate tRNA
b) a coding tRNA
c) a charged tRNA
3) In the following sequence of DNA, the initialized and bold base has been mutated. What type of mutation is this 5’- GATCTCCGAATT – 3’ original strand
5’- GATCTCCCAATT – 3’ mutated strand
a) Transversion
b) Transition
c) Neither
Explanation / Answer
Answer:
1) a) Translocations may result in a promoter that is normally used for one gene now controlling an entirely different gene.
When location of the chromosome is changed, the expression of the gene also effects, such effect is called the postion effect also called as translocation. The phenotype effect is observed due to this postion effect, as observed in the drosophila eye color.
2)c) a charged tRNA
The tRNA are attched with aminoacids during the protein synthesis, each tRNA carry one aminoacid to the protein synthesis site for protein secretion.aminoacyl tRNA synthetase is enzyme which attaches the amino acid to 3 hydroxyl group.
3)Transversion :
Due to mutation when purine is converted to pyrimidine, it is transversion.
when purine is converted to purine or pyrimidine to pyrimidine it is transition.
The "G" is mutated to "C", led to change in aminoacid.
CGA= code for Arginine amino acid
CCA= code for proline amino acid.
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