ASCP Molecular Biology Certification Exam Question with complete solution 2023/2024

ASCP Molecular Biology Certification Exam Question with complete solution 2023/2024Pyrimidine - correct answer One carbon ring Cytosine, Thymine, Uracil Purine - correct answer Two carbon rings Adenine, Guanine How are nucleotides joined together? - correct answer Condensation to form phosphodiester bond What is the function of mRNA? - correct answer Carries genetic info out of nucleus Transcript translated to protein What is the function of tRNA? - correct answer Carries aa to ribosome Anticodon pairs with codon on mRNA strand What is the function of rRNA? - correct answer part of ribosome structure most abundant RNA coordinated coupling of tRNA to mRNA codons Feedback inhibition - correct answer Product of pathway is noncompetitive inhibitor Binds to allosteric site to slow down rxn b/c too much product Exonucleases - correct answer Degrades nucleic acids by removing one terminal nt at a time Cleaves phosphodiester bond at end of chain 5' --> 3' and 3' --> 5' Endonucleases (Prok) - correct answer Restriction enzymes Cleaves phoshpodiester bonds w/i poly-nt chain Recognition site is palindromic sequence Types I-V