,BIOD 101 Module 6 | Practice Q&A | 2026/2027 | Biology | Portage
Learning | 100% PASS
1. In a prokaryotic cell, where is the genetic material (DNA and bacterial
chromosomes) located?
A) Within a membrane-bound nucleus
B) In the nucleoid region
C) Attached to the plasma membrane
D) Within the capsule
Correct Answer: In the nucleoid region
Rationale: The nucleoid region is the non-membrane bound location of DNA
and bacterial chromosomes in a prokaryotic cell. Prokaryotes lack a true
nucleus, so their genetic material is concentrated in this region.
2. What are plasmids in a bacterial cell?
A) Large linear chromosomes
B) Small circular regions of DNA
C) Protein filaments for movement
D) Membrane-bound organelles
Correct Answer: Small circular regions of DNA
Rationale: Plasmids are small circular regions of DNA found in bacteria. They
replicate independently of the chromosomal DNA and often carry genes for
antibiotic resistance or other advantageous traits.
3. Which structure in a prokaryotic cell is responsible for suspending
ribosomes and plasmids?
,A) Nucleoid
B) Cell wall
C) Cytoplasm
D) Capsule
Correct Answer: Cytoplasm
Rationale: The cytoplasm is the intracellular region responsible for
suspending ribosomes and plasmids. It is the gel-like substance that fills the
interior of the cell.
4. How do prokaryotic ribosomes differ from eukaryotic ribosomes?
A) They are larger and membrane-bound
B) They contain unique RNA and proteins and are smaller
C) They are located in the nucleus
D) They are identical in size and structure
Correct Answer: They contain unique RNA and proteins and are smaller
Rationale: Prokaryotic ribosomes contain unique RNA and proteins that can
be targeted by antibiotics. They are not membrane-bound and are smaller
than ribosomes found in eukaryotes.
5. What is the primary function of the bacterial cell wall?
A) To store genetic material
B) To provide cell shape and protection from environmental stressors
C) To synthesize proteins
D) To facilitate movement
, Correct Answer: To provide cell shape and protection from environmental
stressors
Rationale: The cell wall is a rigid wall surrounding the plasma membrane that
is responsible for cell shape and protection from environmental stressors. It
maintains structural integrity.
6. What is the function of the bacterial capsule?
A) To synthesize proteins
B) To provide motility
C) To provide a mechanism of adhesion to host cells or other bacteria
D) To store genetic material
Correct Answer: To provide a mechanism of adhesion to host cells or other
bacteria
Rationale: The capsule is a sticky outer layer of bacteria that provides a
mechanism of adhesion to host cells or other bacteria. It also helps protect
against phagocytosis.
7. What are fimbriae and what is their function?
A) Whip-like structures used for motility
B) Hair-like structures extending from the cell wall used for attachment
C) Protein filaments for DNA transfer
D) Structures for storing nutrients
Correct Answer: Hair-like structures extending from the cell wall used for
attachment
Learning | 100% PASS
1. In a prokaryotic cell, where is the genetic material (DNA and bacterial
chromosomes) located?
A) Within a membrane-bound nucleus
B) In the nucleoid region
C) Attached to the plasma membrane
D) Within the capsule
Correct Answer: In the nucleoid region
Rationale: The nucleoid region is the non-membrane bound location of DNA
and bacterial chromosomes in a prokaryotic cell. Prokaryotes lack a true
nucleus, so their genetic material is concentrated in this region.
2. What are plasmids in a bacterial cell?
A) Large linear chromosomes
B) Small circular regions of DNA
C) Protein filaments for movement
D) Membrane-bound organelles
Correct Answer: Small circular regions of DNA
Rationale: Plasmids are small circular regions of DNA found in bacteria. They
replicate independently of the chromosomal DNA and often carry genes for
antibiotic resistance or other advantageous traits.
3. Which structure in a prokaryotic cell is responsible for suspending
ribosomes and plasmids?
,A) Nucleoid
B) Cell wall
C) Cytoplasm
D) Capsule
Correct Answer: Cytoplasm
Rationale: The cytoplasm is the intracellular region responsible for
suspending ribosomes and plasmids. It is the gel-like substance that fills the
interior of the cell.
4. How do prokaryotic ribosomes differ from eukaryotic ribosomes?
A) They are larger and membrane-bound
B) They contain unique RNA and proteins and are smaller
C) They are located in the nucleus
D) They are identical in size and structure
Correct Answer: They contain unique RNA and proteins and are smaller
Rationale: Prokaryotic ribosomes contain unique RNA and proteins that can
be targeted by antibiotics. They are not membrane-bound and are smaller
than ribosomes found in eukaryotes.
5. What is the primary function of the bacterial cell wall?
A) To store genetic material
B) To provide cell shape and protection from environmental stressors
C) To synthesize proteins
D) To facilitate movement
, Correct Answer: To provide cell shape and protection from environmental
stressors
Rationale: The cell wall is a rigid wall surrounding the plasma membrane that
is responsible for cell shape and protection from environmental stressors. It
maintains structural integrity.
6. What is the function of the bacterial capsule?
A) To synthesize proteins
B) To provide motility
C) To provide a mechanism of adhesion to host cells or other bacteria
D) To store genetic material
Correct Answer: To provide a mechanism of adhesion to host cells or other
bacteria
Rationale: The capsule is a sticky outer layer of bacteria that provides a
mechanism of adhesion to host cells or other bacteria. It also helps protect
against phagocytosis.
7. What are fimbriae and what is their function?
A) Whip-like structures used for motility
B) Hair-like structures extending from the cell wall used for attachment
C) Protein filaments for DNA transfer
D) Structures for storing nutrients
Correct Answer: Hair-like structures extending from the cell wall used for
attachment
