Question at position 3 What does DNA replication, template-based DNA repair, transcription, translation, microRNA regulation of mRNA, and PCR have in common?They all use complimentary base-pairing to transfer informationThey all use single stranded DNA as a template to copy the informationThey all take place in the nucleus of the cellThey all use energy in the form of dideoxy adenosine triphospate nucleotides (ddATPs) to drive the copying of genetic information. Clear my selection

Question

Question at position 3 What does DNA replication, template-based DNA repair, transcription, translation, microRNA regulation of mRNA, and PCR have in common?They all use complimentary base-pairing to transfer informationThey all use single stranded DNA as a template to copy the informationThey all take place in the nucleus of the cellThey all use energy in the form of dideoxy adenosine triphospate nucleotides (ddATPs) to drive the copying of genetic information. Clear my selection

BlackTom AI · Accepted Answer

To tackle this question, I’ll compare what each listed option implies about the shared feature of these molecular processes.
Option 1: 'They all use complimentary base-pairing to transfer information' — This is the core idea that links DNA replication, template-based DNA repair, transcription, translation, microRNA regulation of mRNA, and PCR. Complementary base-pairing is the fundamental mechanism that enables information transfer: A pairs with T, C with G in DNA, and RNA uses A-U pairing; this principle underlies accurate copying, editing, and regulation of genetic material, as well as the annealing steps used in PCR.
Option 2: 'They all use single stranded DNA as a template to copy the information' — This is inaccurate for several processes. DNA replication uses a double-stranded DNA genome as the template, not a single strand, though the strands are unwound. Transcription uses a DNA template strand, not necessarily single-stranded DNA as the template, and translation occurs on mRNA, which is single-stranded RNA, but the statement misattributes a universal template form across all processes. MicroRNA regulation acts on mRNA transcripts, not on DNA templates, and PCR relies on double-stranded DNA templates, not exclusively single-stranded DNA.
Option 3: 'They all take place in the nucleus of the cell' — This is false for many of the listed processes. While replication, repair, transcription occur in the nucleus in eukaryotic cells, translation occurs in the cytoplasm (on ribosomes), and PCR is a laboratory technique, not a cellular process confined to the nucleus.
Option 4: 'They all use energy in the form of dideoxy adenosine triphospate nucleotides (ddATPs) to drive the copying of genetic information' — This is incorrect. ddATP (and other ddNTPs) are chain-terminating nucleotides used in sequencing methods, not general energy sources for copying or copying-like processes. In fact, PCR and most normal replication rely on regular nucleotides (dNTPs) and cellular energy currencies (like ATP), not ddNTPs, and ddNTPs impede synthesis rather than drive it.
Across the options, the most consistent and universally applicable concept is the first one: complementary base-pairing enables information transfer across these different molecular events, whereas the other choices misstate template form, cellular location, or energy requirements. Different processes may involve either RNA or DNA templates, and translation, repair, and replication have distinct cellular contexts and energy usage, which these options fail to uniformly capture.

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