Let's go through each question step by step:
---
Q.2: Label the main parts of a typical bacterial cell in the diagram below.
The diagram already has labels, and they are correctly placed. Here’s a quick verification of each labeled part:
-
Capsule – Outermost layer, protects the cell; often helps in attachment.
-
Cell wall – Provides structural support and shape (made of peptidoglycan in bacteria).
-
Plasma membrane – Controls movement of substances in and out of the cell.
-
Pilus – Hair-like appendages used for attachment or conjugation.
-
Flagellum – Long whip-like structure used for motility.
-
Cytoplasm – Gel-like substance inside the cell where metabolic processes occur.
-
Nucleoid (DNA) – Region containing the bacterial chromosome (not enclosed in a nucleus).
-
Ribosomes – Sites of protein synthesis.
-
Plasmid – Small circular DNA molecule separate from the chromosome; can carry antibiotic resistance genes.
✔ All labels in the diagram are
correctly placed.
---
Q.3: Which of the following diseases is NOT caused by viruses?
Options:
a) Ringworm
b) AIDS
c) Hepatitis B
d) Influenza
Let’s analyze each:
-
a) Ringworm → Caused by
fungi (specifically dermatophytes), not viruses.
-
b) AIDS → Caused by
HIV virus (Human Immunodeficiency Virus).
-
c) Hepatitis B → Caused by
Hepatitis B virus.
-
d) Influenza → Caused by
Influenza virus.
✔ Correct answer: a) Ringworm — it is
not caused by a virus.
---
Q.4: Which of the following disease is NOT caused by bacteria?
Options:
a) Tetanus
b) Cholera
c) Ebola
d) Tuberculosis
Analyze each:
-
a) Tetanus → Caused by *Clostridium tetani* (
bacterium).
-
b) Cholera → Caused by *Vibrio cholerae* (
bacterium).
-
c) Ebola → Caused by
Ebola virus (a
virus, not a bacterium).
-
d) Tuberculosis → Caused by *Mycobacterium tuberculosis* (
bacterium).
✔ Correct answer: c) Ebola — it is
not caused by bacteria.
---
✔ Final Answers:
-
Q.2: The diagram is correctly labeled as shown.
-
Q.3: a) Ringworm
-
Q.4: c) Ebola
Let me know if you'd like a summary or explanation in simpler terms!
Parent Tip: Review the logic above to help your child master the concept of bacteria worksheet high school biology.
