Course Title
Module #8 Student Activity Sheet
LESSON TITLE: MICROBIAL DIVERSITY: PROKARYOTIC MICROBES
A. LESSON PREVIEW/REVIEW (5 minutes)
Instruction: Enumerate the Steps in Lytic Cycle in Animal Viruses.
1. Attachment (adsorption) of the phage to the surface of the bacterial cell. The phage can
only attach to bacterial cells that possess the appropriate receptor—a protein or polysaccharide
molecule on the surface of the cell that is recognized by a molecule on the surface of the phage.
2. Penetration. In this step, the phage injects its DNA into the bacterial cell, acting much like a
hypodermic needle. From this point on, the phage DNA ―dictates‖ what occurs within the
bacterial cell. This is sometimes described as the phage DNA taking over the host cell’s
―machinery.‖
3. Biosynthesis. It is during this step that the phage genes are expressed, resulting in the
production (biosynthesis) of viral pieces. It is also during this step that the host cell’s enzymes
(e.g., DNA polymerase and RNA polymerase), nucleotides, amino acids, and ribosomes are
used to make viral DNA and viral proteins.
4. Assembly, the viral pieces are assembled to produce complete viral particles (virions). It is
during this step that viral DNA is packaged up into capsids.
5. Release is when the host cell bursts open and all of the new virions (about 50–1,000) escape
from the cell.
CHECK FOR UNDERSTANDING (30 minutes)
You will answer and rationalize this by yourself. This will be recorded as your quiz. One (1) point
will be given to correct answer and another one (1) point for the correct ratio. Superimpositions
or erasures in you answer/ratio is not allowed.
You are given 30 minutes for this activity:
1. Most prokaryotic cells reproduce by:
a. binary fission.
b. budding.
c. gamete production.
d. spore formation.
Answer: A
Rationale: Bacteria reproduce by binary fission. The time it takes for one bacterial cell to split into two
cells is referred to as that organism’s generation time.
2. The group of bacteria that lack rigid cell walls and take on irregular shapes is:
Module #8 Student Activity Sheet
LESSON TITLE: MICROBIAL DIVERSITY: PROKARYOTIC MICROBES
A. LESSON PREVIEW/REVIEW (5 minutes)
Instruction: Enumerate the Steps in Lytic Cycle in Animal Viruses.
1. Attachment (adsorption) of the phage to the surface of the bacterial cell. The phage can
only attach to bacterial cells that possess the appropriate receptor—a protein or polysaccharide
molecule on the surface of the cell that is recognized by a molecule on the surface of the phage.
2. Penetration. In this step, the phage injects its DNA into the bacterial cell, acting much like a
hypodermic needle. From this point on, the phage DNA ―dictates‖ what occurs within the
bacterial cell. This is sometimes described as the phage DNA taking over the host cell’s
―machinery.‖
3. Biosynthesis. It is during this step that the phage genes are expressed, resulting in the
production (biosynthesis) of viral pieces. It is also during this step that the host cell’s enzymes
(e.g., DNA polymerase and RNA polymerase), nucleotides, amino acids, and ribosomes are
used to make viral DNA and viral proteins.
4. Assembly, the viral pieces are assembled to produce complete viral particles (virions). It is
during this step that viral DNA is packaged up into capsids.
5. Release is when the host cell bursts open and all of the new virions (about 50–1,000) escape
from the cell.
CHECK FOR UNDERSTANDING (30 minutes)
You will answer and rationalize this by yourself. This will be recorded as your quiz. One (1) point
will be given to correct answer and another one (1) point for the correct ratio. Superimpositions
or erasures in you answer/ratio is not allowed.
You are given 30 minutes for this activity:
1. Most prokaryotic cells reproduce by:
a. binary fission.
b. budding.
c. gamete production.
d. spore formation.
Answer: A
Rationale: Bacteria reproduce by binary fission. The time it takes for one bacterial cell to split into two
cells is referred to as that organism’s generation time.
2. The group of bacteria that lack rigid cell walls and take on irregular shapes is:
