Objectives of Biology From Book Chapters

By: Prof. Dr. Fazal Rehman | Last updated: May 14, 2025

1. : What is the healing time of a bone?
(A) 8–12 months
(B) 8–12 years
(C) 8–12 weeks
(D) 8–12 days

2. : When the group of ribosomes are attached to mRNA, it is called as?
(A) Polysome
(B) Polymer
(C) Monomer
(D) Polypeptide

3. : Which of the following is found in hydrostatic skeleton?
(A) Soft-bodied invertebrates
(B) Annelids
(C) Cnidarians
(D) All of these

4. : What are the autophagosomes?
(A) Lysosomes which help in extracellular digestion
(B) Those lysosomes which eat old and worn-out cellular organelles
(C) Those lysosomes which eat parts of their own cells to generate energy
(D) B and C

5. : Which of the following provides support to the animals?
(A) Bones
(B) Cartilage
(C) Muscles
(D) All of these

6. : Where is the first layer of cell wall formed?
(A) Middle lamella
(B) Primary wall
(C) Secondary wall
(D) C and A

7. : What is the diameter of skeletal muscles?
(A) 1–10 μm
(B) 10–50 μm
(C) 10–100 μm
(D) 20–200 μm

8. : How many triplets of microtubules compose centrioles?
(A) 9
(B) 3
(C) 10
(D) 15

9. : What is the outermost layer of the epicuticle?
(A) Hydrostatic skeleton
(B) Hydrodynamic skeleton
(C) Exoskeleton
(D) Endoskeleton

10. : Where are ribosomes assembled?
(A) DNA
(B) RNA
(C) Nucleus
(D) Nucleolus

11. : What is the number of facial bones present in humans?
(A) 14
(B) 10
(C) 16
(D) 20

12. : Which of the following molecules is present in chlorophyll (II)?
(A) Anionic
(B) Inorganic
(C) Organic
(D) Cationic