TOPHAT (EXAM 3)- TTU Cell Biology Exam Questions & Answers (Grade A+).docx

TOPHAT (EXAM 3)- TTU Cell Biology
Exam Questions & Answers (Grade
A+)
What is this bond (involves phosphate group)? -
correct answer ✅Phosphodiester Bond


What is this bond (the dotted lines)? -
correct answer ✅Hydrogen Bond




Regulation of transcription depends on -
correct answer ✅Gene regulatory sequences like enhance,
silencer, promoter seq.
DNA Methylation (methylated Cytosine) Histone modification
(euchromatin vs heterochromatin)


Regulation of translation from mRNA depends on -
correct answer ✅5' (7-methyl guanosine) Capping of mRNA
Splicing of mRNA
3' Poly-Adenylation

, TOPHAT (EXAM 3)- TTU Cell Biology
Exam Questions & Answers (Grade
A+)
Post transcriptional modification includes -
correct answer ✅5' (7-methyl guanosine) Capping of mRNA
Splicing of mRNA
3' Poly-Adenylation


Post translation modification includes -
correct answer ✅Protein modification (like phosphorylation,
glycosylation etc.)


Histone modification includes -
correct answer ✅Methylation/ de-methylation Phosphorylation/
de-phosphorylation Acetylation/ de-acetylation


Centromere and telomere regions contain -
correct answer ✅Constitutive Heterochromatin


Which modification do you expect to see in the heterochromatic X
chromosome? -
correct answer ✅Removal of the acetyl groups from H3 and H4
histones i.e., deacetylated histones.
Methylation of H3 histone