PCB 3023 EXAM QUESTIONS AND
ANSWERS GRADED A+ 2026
Mechanism that turns DNA to RNA - ANS transcription
Mechanism that turns RNA to proteins - ANS Translation
True or false
RNA can be reverse-transcribed to DNA - ANS True
________ in DNA and RNA gives sequence information to amino acids - ANS Nucleotides
True or false
Life requires autocatalysis, but RNA is not able to catalyze chemical reactions - ANS false
RNA is thought to predate DNA
Ribozyme - ANS RNA molecule
Enzymes are made of - ANS protein that catalyze functions
Give an example of a ribo-nucleo-protein - ANS ribozome
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
1
, Ribosome function in translation
_______ bond formation in protein synthesis catalyzed by peptidyl transferase - ANS peptide
What is peptidyl transferase - ANS rRNA of large ribosomal subunit
How could rna have made dna - ANS reverse transcription
3 characteristics of a eukaryote - ANS nuclear envelop, membrane bound organelles,
cytoskeleton
True or false
Bacteria and archaea are both prokaryotes - ANS True
What is a major characteristic of prokaryotes - ANS Single circular chromosome, no
membrane bound organelles
Of bacteria, eukaryotes, and archaea; which group is the most diverse - ANS Bacteria
True or false
Bacteria are simple organisms who cannot have specialized internal systems - ANS False, can
have different spots for photosynthesis, weather resistance, nitrogen fixing
Eukaryotes are more closely related to archaea or bacteria - ANS archaea
What is special about archaea - ANS live in extreme environments, and have unique cell wall
chemistry/membrane lipids
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
2
ANSWERS GRADED A+ 2026
Mechanism that turns DNA to RNA - ANS transcription
Mechanism that turns RNA to proteins - ANS Translation
True or false
RNA can be reverse-transcribed to DNA - ANS True
________ in DNA and RNA gives sequence information to amino acids - ANS Nucleotides
True or false
Life requires autocatalysis, but RNA is not able to catalyze chemical reactions - ANS false
RNA is thought to predate DNA
Ribozyme - ANS RNA molecule
Enzymes are made of - ANS protein that catalyze functions
Give an example of a ribo-nucleo-protein - ANS ribozome
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
1
, Ribosome function in translation
_______ bond formation in protein synthesis catalyzed by peptidyl transferase - ANS peptide
What is peptidyl transferase - ANS rRNA of large ribosomal subunit
How could rna have made dna - ANS reverse transcription
3 characteristics of a eukaryote - ANS nuclear envelop, membrane bound organelles,
cytoskeleton
True or false
Bacteria and archaea are both prokaryotes - ANS True
What is a major characteristic of prokaryotes - ANS Single circular chromosome, no
membrane bound organelles
Of bacteria, eukaryotes, and archaea; which group is the most diverse - ANS Bacteria
True or false
Bacteria are simple organisms who cannot have specialized internal systems - ANS False, can
have different spots for photosynthesis, weather resistance, nitrogen fixing
Eukaryotes are more closely related to archaea or bacteria - ANS archaea
What is special about archaea - ANS live in extreme environments, and have unique cell wall
chemistry/membrane lipids
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
2
