CBE 205 FINAL EXAM NEWEST 2026 COMPLETE
200+ ACCURATE QUESTIONS WITH CORRECT
VERIFIED ANSWERS/ AGRADE ASSURED!!
1. What are the three domains of life?
A) Protista, Fungi, Plantae
B) Bacteria, Archaea, Eukarya
C) Prokaryota, Eukaryota, Monera
D) Animalia, Plantae, Protista
Answer: B
Rationale: The three domains of life are Bacteria, Archaea, and
Eukarya . This classification system, based on rRNA analysis,
distinguishes organisms by their cellular organization and
evolutionary history.
1
,2. Which domain contains organisms with peptidoglycan in
their cell walls?
A) Archaea
B) Bacteria
C) Eukarya
D) Both Bacteria and Archaea
Answer: B
Rationale: Bacteria are characterized by having a cell wall
containing peptidoglycan . Archaea have different cell wall
composition without peptidoglycan, and Eukarya include
organisms with membrane-bound nuclei.
3. Which characteristic is unique to Archaea compared to
Bacteria?
2
,A) Single-celled organisms
B) No membrane around the nucleus
C) Different cell wall composition - no peptidoglycan
D) Contain ribosomes
Answer: C
Rationale: Archaea share many characteristics with Bacteria
(single-celled, no membrane-bound nucleus) but differ in their cell
wall composition . Archaeal cell walls lack peptidoglycan, a key
distinguishing feature.
4. Which of the following is a characteristic of Eukarya?
A) Single-celled only
B) No membrane around the nucleus
C) Nucleus has a membrane; often multicellular
D) Cell walls contain peptidoglycan
3
, Answer: C
Rationale: Eukarya are characterized by having a membrane-
bound nucleus and are often multicellular . This domain includes
plants, animals, fungi, and protists.
5. What is the central dogma of molecular biology?
A) Protein → RNA → DNA
B) DNA → RNA → Protein
C) RNA → DNA → Protein
D) DNA → Protein → RNA
Answer: B
Rationale: The central dogma describes the flow of genetic
information: DNA is transcribed into RNA, which is then translated
into protein . This fundamental principle explains how genetic
information is expressed.
4
200+ ACCURATE QUESTIONS WITH CORRECT
VERIFIED ANSWERS/ AGRADE ASSURED!!
1. What are the three domains of life?
A) Protista, Fungi, Plantae
B) Bacteria, Archaea, Eukarya
C) Prokaryota, Eukaryota, Monera
D) Animalia, Plantae, Protista
Answer: B
Rationale: The three domains of life are Bacteria, Archaea, and
Eukarya . This classification system, based on rRNA analysis,
distinguishes organisms by their cellular organization and
evolutionary history.
1
,2. Which domain contains organisms with peptidoglycan in
their cell walls?
A) Archaea
B) Bacteria
C) Eukarya
D) Both Bacteria and Archaea
Answer: B
Rationale: Bacteria are characterized by having a cell wall
containing peptidoglycan . Archaea have different cell wall
composition without peptidoglycan, and Eukarya include
organisms with membrane-bound nuclei.
3. Which characteristic is unique to Archaea compared to
Bacteria?
2
,A) Single-celled organisms
B) No membrane around the nucleus
C) Different cell wall composition - no peptidoglycan
D) Contain ribosomes
Answer: C
Rationale: Archaea share many characteristics with Bacteria
(single-celled, no membrane-bound nucleus) but differ in their cell
wall composition . Archaeal cell walls lack peptidoglycan, a key
distinguishing feature.
4. Which of the following is a characteristic of Eukarya?
A) Single-celled only
B) No membrane around the nucleus
C) Nucleus has a membrane; often multicellular
D) Cell walls contain peptidoglycan
3
, Answer: C
Rationale: Eukarya are characterized by having a membrane-
bound nucleus and are often multicellular . This domain includes
plants, animals, fungi, and protists.
5. What is the central dogma of molecular biology?
A) Protein → RNA → DNA
B) DNA → RNA → Protein
C) RNA → DNA → Protein
D) DNA → Protein → RNA
Answer: B
Rationale: The central dogma describes the flow of genetic
information: DNA is transcribed into RNA, which is then translated
into protein . This fundamental principle explains how genetic
information is expressed.
4
