"Structural organisation in animals mcq online test with answers"
Time Left: 45:00
Total Marks: 180, Obtained Marks: 0
1. The kind of epithelium which forms the inner walls of blood vessels is:
A. Cuboidal epithelium
B. Columnar epithelium
C. Ciliated columnar epithelium
D. Squamous epithelium
The correct answer is D. Squamous epithelium.
Squamous epithelium consists of thin, flat cells forming a smooth surface, ideal for the lining of blood vessels, facilitating frictionless blood flow and gas exchange.
Squamous epithelium consists of thin, flat cells forming a smooth surface, ideal for the lining of blood vessels, facilitating frictionless blood flow and gas exchange.
2. The cell junctions called tight, adhering, and gap junctions are found in:
A. Connective tissue
B. Epithelial tissue
C. Neural tissue
D. Muscular tissue
The correct answer is B. Epithelial tissue.
Tight, adhering, and gap junctions are specialized structures facilitating cell-to-cell communication and cohesion, primarily found in epithelial tissues.
Tight, adhering, and gap junctions are specialized structures facilitating cell-to-cell communication and cohesion, primarily found in epithelial tissues.
3. Housefly possesses:
A. Two pairs of wings
B. One pair of wings
C. Three pairs of wings
D. Four pairs of wings
The correct answer is B. One pair of wings.
Houseflies belong to the order Diptera, characterized by a single pair of functional wings, with the second pair modified into halteres for balance.
Houseflies belong to the order Diptera, characterized by a single pair of functional wings, with the second pair modified into halteres for balance.
4. Excretory organs of cockroach are:
A. Flame cells
B. Nephridia
C. Green glands
D. Malpighian tubules
The correct answer is D. Malpighian tubules.
Malpighian tubules in cockroaches are responsible for osmoregulation and excretion, removing nitrogenous wastes and maintaining ionic balance.
Malpighian tubules in cockroaches are responsible for osmoregulation and excretion, removing nitrogenous wastes and maintaining ionic balance.
5. Myoglobin is present in:
A. All muscle fibers
B. White muscle fibers only
C. Red muscle fibers only
D. Both white and red muscle fibers
The correct answer is D. Both white and red muscle fibers.
Myoglobin is a single-chain globular protein of 153 amino acids, containing a heme (iron-containing porphyrin) prosthetic group in the center around which the remaining apoprotein folds. It has a molecular weight of 16,700 daltons, and is the primary oxygen-carrying pigment of muscle tissues. Unlike the blood-borne hemoglobin, to which it is structurally related, this protein does not exhibit cooperative binding of oxygen, since positive cooperativity is a property of multimeric/oligomeric proteins only.
Myoglobin is a single-chain globular protein of 153 amino acids, containing a heme (iron-containing porphyrin) prosthetic group in the center around which the remaining apoprotein folds. It has a molecular weight of 16,700 daltons, and is the primary oxygen-carrying pigment of muscle tissues. Unlike the blood-borne hemoglobin, to which it is structurally related, this protein does not exhibit cooperative binding of oxygen, since positive cooperativity is a property of multimeric/oligomeric proteins only.
6. Intercalated discs are the communication junctions between the cells of:
A. Cardiac muscles
B. Striped muscles
C. Adipose tissue
D. Nerve and striated muscles
The correct answer is A. Cardiac muscles.
Intercalated discs facilitate synchronized contraction of cardiac muscle cells by enabling rapid communication and electrical impulse propagation.
Intercalated discs facilitate synchronized contraction of cardiac muscle cells by enabling rapid communication and electrical impulse propagation.
7. What is common among silverfish, scorpion, crab, and honeybee?
A. Compound eyes
B. Poison glands
C. Jointed legs
D. Metamorphosis
The correct answer is C. Jointed legs.
All of these organisms belong to the phylum Arthropoda, which is characterized by the presence of jointed appendages.
All of these organisms belong to the phylum Arthropoda, which is characterized by the presence of jointed appendages.
8. Mast cells are associated with:
A. Exocrine glands
B. Endocrine glands
C. Areolar connective tissue
D. Neural tissue
The correct answer is C. Areolar connective tissue.
Mast cells are found in areolar connective tissue and are involved in inflammatory responses, releasing histamine.
Mast cells are found in areolar connective tissue and are involved in inflammatory responses, releasing histamine.
9. Lymph differs from blood in possessing:
A. Only WBCs
B. More RBCs and WBCs
C. More RBCs and few WBCs
D. More WBCs and few RBCs
The correct answer is A. Only WBCs.
Lymph is a fluid containing white blood cells (WBCs) but no red blood cells (RBCs), unlike blood.
Lymph is a fluid containing white blood cells (WBCs) but no red blood cells (RBCs), unlike blood.
10. Pseudostratified epithelium is found in:
A. Oesophagus
B. Respiratory tract
C. Urinary tract
D. Kidney
The correct answer is B. Respiratory tract.
Pseudostratified epithelium is found lining the respiratory tract and helps in trapping and moving particles with its cilia.
Pseudostratified epithelium is found lining the respiratory tract and helps in trapping and moving particles with its cilia.
11. Given below are four matchings of an animal and its kind of respiratory organ:
(i) Silverfish – trachea
(ii) Scorpion – book lung
(iii) Sea squirt – pharyngeal gills
(iv) Dolphin – skin
The correct matchings are:
(i) Silverfish – trachea
(ii) Scorpion – book lung
(iii) Sea squirt – pharyngeal gills
(iv) Dolphin – skin
The correct matchings are:
A. (iii) and (iv)
B. (i) and (iv)
C. (i), (ii), and (iii)
D. (ii) and (iv)
The correct answer is C. (i), (ii), and (iii).
Silverfish use tracheae, scorpions have book lungs, and sea squirts use pharyngeal gills for respiration.
Silverfish use tracheae, scorpions have book lungs, and sea squirts use pharyngeal gills for respiration.
12. Tendons and ligaments are examples of:
A. Areolar connective tissue
B. Adipose tissue
C. Dense regular connective tissue
D. Loose connective tissue
The correct answer is C. Dense regular connective tissue.
Tendons and ligaments are made of dense regular connective tissue, providing strength and flexibility in a unidirectional manner.
Tendons and ligaments are made of dense regular connective tissue, providing strength and flexibility in a unidirectional manner.
13. Major inorganic component of vertebrate bone is:
A. Calcium carbonate
B. Calcium phosphate
C. Sodium hydroxide
D. Potassium hydroxide
The correct answer is B. Calcium phosphate.
Calcium phosphate provides hardness and strength to bones as a primary mineral component.
Calcium phosphate provides hardness and strength to bones as a primary mineral component.
14. Histamine is secreted by:
A. Mast cells
B. Fibroblasts
C. Histocytes
D. Melanocytes
The correct answer is A. Mast cells.
Mast cells release histamine, which plays a crucial role in allergic reactions and inflammation.
Mast cells release histamine, which plays a crucial role in allergic reactions and inflammation.
15. Which of the following is not a granulocyte?
A. Lymphocyte
B. Neutrophil
C. Basophil
D. Eosinophil
The correct answer is A. Lymphocyte.
Lymphocytes are agranulocytes, whereas neutrophils, basophils, and eosinophils are granulocytes.
Lymphocytes are agranulocytes, whereas neutrophils, basophils, and eosinophils are granulocytes.
16. The type of epithelial cells lining the inner surface of fallopian tubes, bronchioles, and small bronchi are known as:
A. Squamous epithelium
B. Columnar epithelium
C. Ciliated epithelium
D. Cubical epithelium
The correct answer is C. Ciliated epithelium.
Ciliated epithelium helps in the movement of substances, like eggs in the fallopian tubes and mucus in bronchioles.
Ciliated epithelium helps in the movement of substances, like eggs in the fallopian tubes and mucus in bronchioles.
17. Male and female cockroaches can be distinguished externally through:
A. Anal styles in males
B. Anal cerci in females
C. Antennae in females
D. Both (B) and (C)
The correct answer is A. Anal styles in males.
Anal styles are present only in male cockroaches, making it a distinguishing feature.
Anal styles are present only in male cockroaches, making it a distinguishing feature.
18. The long bones are hollow and connected by air passage. They are characteristic of:
A. Aves
B. Mammalia
C. Reptilia
D. Sponges
The correct answer is A. Aves.
Birds (Aves) have hollow, pneumatic bones that reduce weight and help in flight.
Birds (Aves) have hollow, pneumatic bones that reduce weight and help in flight.
19. The most active phagocytic white blood cells are:
A. Neutrophils and monocytes
B. Neutrophils and eosinophils
C. Lymphocytes and macrophages
D. Eosinophils and lymphocytes
The correct answer is A. Neutrophils and monocytes.
Neutrophils and monocytes are key phagocytic cells that engulf and destroy pathogens.
Neutrophils and monocytes are key phagocytic cells that engulf and destroy pathogens.
20. In the mouthparts of the cockroach, the organ of mastication is:
A. Labium
B. Maxillae
C. Mandibles
D. Labrum
The correct answer is C. Mandibles.
Mandibles are the primary organs of mastication in cockroaches, used to crush and chew food.
Mandibles are the primary organs of mastication in cockroaches, used to crush and chew food.
21. Which one of the following groups of structures/organs have similar functions?
A. Typhlosole in earthworm, intestinal villi in rat, and contractile vacuole in Amoeba
B. Nephridia in earthworm, malpighian tubules in cockroach, and urinary tubules in rat
C. Antennae of cockroach, tympanum of frog, and clitellum of earthworm
D. Incisors of rat, gizzard of cockroach, and tube feet of starfish
The correct answer is Nephridia in earthworm, malpighian tubules in cockroach, and urinary tubules in rat.
Nephridia in earthworm, malpighian tubules in cockroach and urinary tubules in the rat are excretory in function
Nephridia in earthworm, malpighian tubules in cockroach and urinary tubules in the rat are excretory in function
22. Which of the following statements are wrong?
(i)Leucocytes disintegrate in the spleen and liver.
(ii) RBC, WBC and blood platelets are produced by bone marrow.
(iii) Neutrophils bring about destruction and detoxification of toxins of protein origin.
(iv) The important function of lymphocytes is to produce antibodies.
A. (i) and (ii) only
B. (i) and (iv) only
C. (i) and (iii) only
D. (ii) and (iii) only
The correct answer is C. (i) and (iii) only.
These statements are incorrect as they refer to processes not associated with the spleen and liver or incorrect toxin detoxification methods.
These statements are incorrect as they refer to processes not associated with the spleen and liver or incorrect toxin detoxification methods.
23. Malpighian tubules are the excretory organs in:
A. Cockroach
B. Platyhelminthes
C. Ascaris
D. Pila
The correct answer is A. Cockroach.
Malpighian tubules in cockroaches help in excretion and osmoregulation by eliminating nitrogenous waste.
Malpighian tubules in cockroaches help in excretion and osmoregulation by eliminating nitrogenous waste.
24. The young one of a cockroach is called:
A. Naid
B. Grub
C. Nymph
D. Maggot
The correct answer is C. Nymph.
The nymph is the immature stage of a cockroach, resembling the adult but without fully developed wings and reproductive organs.
The nymph is the immature stage of a cockroach, resembling the adult but without fully developed wings and reproductive organs.
25. Cilia, flagella, and microvilli are associated with:
A. Connective tissue
B. Epithelial tissue
C. Nervous tissue
D. Muscular tissue
The correct answer is B. Epithelial tissue.
Cilia, flagella, and microvilli are surface specializations found on epithelial cells to enhance their function, such as movement or absorption.
Cilia, flagella, and microvilli are surface specializations found on epithelial cells to enhance their function, such as movement or absorption.
26. In which of the following animals does respiration occur without any respiratory organ?
A. Frog
B. Fish
C. Cockroach
D. Earthworm
The correct answer is D. Earthworm.
Earthworms respire through their moist skin via diffusion, without the use of specialized respiratory organs.
Earthworms respire through their moist skin via diffusion, without the use of specialized respiratory organs.
27. Which of the following types of cell junctions is not found in animal tissues?
A. Desmosome
B. Tight junction
C. Gap junction
D. Plasmodesmata
The correct answer is D. Plasmodesmata.
Plasmodesmata are channels that connect plant cells, allowing transport and communication, and are not found in animal tissues.
Plasmodesmata are channels that connect plant cells, allowing transport and communication, and are not found in animal tissues.
28. The cellular component of blood responsible for antibody production is:
A. Thrombocyte
B. Lymphocyte
C. Monocyte
D. Erythrocyte
The correct answer is B. Lymphocyte.
Lymphocytes are white blood cells that produce antibodies as part of the immune response.
Lymphocytes are white blood cells that produce antibodies as part of the immune response.
29. Sprain is caused due to the excessive pulling of:
A. Muscles
B. Tendons
C. Ligaments
D. All of the above
The correct answer is C. Ligaments.
A sprain occurs when ligaments, which connect bones at joints, are stretched or torn due to excessive force.
A sprain occurs when ligaments, which connect bones at joints, are stretched or torn due to excessive force.
30. In cockroach, the corpora allata is:
A. A sense organ
B. A tactile organ
C. An endocrine organ
D. A digestive gland
The correct answer is C. An endocrine organ.
The corpora allata in cockroaches secrete juvenile hormones, which regulate growth and development.
The corpora allata in cockroaches secrete juvenile hormones, which regulate growth and development.
31. Which of the following is incorrect regarding the structure/gland of cockroach and its total number in the body?
A. Collateral glands in female cockroach - 2
B. Malpighian tubules - 100-150
C. Spiracles - 10
D. Ommatidia in each compound eye - 2000
The correct answer is C. Spiracles - 10.
Cockroaches typically have 10 spiracles, 2 on each thoracic segment and 3 on each abdominal segment.
Cockroaches typically have 10 spiracles, 2 on each thoracic segment and 3 on each abdominal segment.
32. The function of the basement membrane in epithelial tissue is to:
A. Facilitate communication of cells with each other
B. Allow rapid ion transfer among cells
C. Separate the epithelial tissue from underlying connective tissue
D. Produce multiple layers of cells in a compound epithelium
The correct answer is C. Separate the epithelial tissue from underlying connective tissue.
The basement membrane provides structural support to epithelial tissues and separates them from the underlying tissues.
The basement membrane provides structural support to epithelial tissues and separates them from the underlying tissues.
33. All among the following are functions of connective tissue except:
A. Binding support
B. Fat storage
C. Body defense and transport
D. Propelling mucus towards the pharynx
The correct answer is D. Propelling mucus towards the pharynx.
This is the function of ciliated epithelial tissue, not connective tissue.
This is the function of ciliated epithelial tissue, not connective tissue.
34. Mark the statement that is incorrect for smooth muscles.
A. Smooth muscles form the muscular component of the visceral organs such as blood vessels, urinary bladder, ciliary body, etc.
B. Smooth muscle cells do not have the troponin-tropomyosin mechanism of controlling contraction
C. Irritability is shown by all smooth muscles except ciliary muscles
D. Hair root muscles and muscles on the large blood vessels are examples of multi-unit smooth muscles
The correct answer is C. Irritability is shown by all smooth muscles except ciliary muscles.
Ciliary muscles are a special type of smooth muscle that do not exhibit irritability, unlike other smooth muscles.
Ciliary muscles are a special type of smooth muscle that do not exhibit irritability, unlike other smooth muscles.
35. The avascular nature of cartilage is responsible for its:
A. Flexibility
B. Slow repair
C. Suitability for embryonic endoskeleton
D. Transparent consistency
The correct answer is B. Slow repair.
The lack of blood vessels in cartilage slows down its ability to repair itself after injury, as nutrients are delivered more slowly.
The lack of blood vessels in cartilage slows down its ability to repair itself after injury, as nutrients are delivered more slowly.
36. Match Column-I with Column-II and select the correct option from the codes given below.
Column-I:
A. Hyaline cartilage
B. Fibrous cartilage
C. Elastic cartilage
D. Calcified cartilage
Column-II:
I. Pectoral girdle of frog
II. Long bones; sternum; ribs
III. Pubic symphysis
IV. Eustachian tube; epiglottis
Column-I:
A. Hyaline cartilage
B. Fibrous cartilage
C. Elastic cartilage
D. Calcified cartilage
Column-II:
I. Pectoral girdle of frog
II. Long bones; sternum; ribs
III. Pubic symphysis
IV. Eustachian tube; epiglottis
A. A-I; B-II; C-III; D-IV
B. A-II; B-III; C-IV; D-I
C. A-II; B-IV; C-III; D-I
D. A-IV; B-III; C-II; D-I
The correct answer is C. A-II; B-IV; C-III; D-I.
The matching is based on the functions and locations of each type of cartilage in the body.
The matching is based on the functions and locations of each type of cartilage in the body.
37. The type of epithelial cells which line the inner surface of Fallopian tubes, bronchioles, and small bronchi are known as:
A. Squamous epithelium
B. Columnar epithelium
C. Ciliated epithelium
D. Cubical epithelium
The correct answer is C. Ciliated epithelium.
Ciliated epithelium helps in the movement of fluids or particles across surfaces, such as the movement of eggs in the fallopian tubes.
Ciliated epithelium helps in the movement of fluids or particles across surfaces, such as the movement of eggs in the fallopian tubes.
38. The wall of the heart is thick due to:
A. Pericardium
B. Epicardium
C. Myocardium
D. Endocardium
The correct answer is C. Myocardium.
The myocardium is the muscular layer of the heart wall responsible for contraction and pumping blood.
The myocardium is the muscular layer of the heart wall responsible for contraction and pumping blood.
39. The strongest cartilage is:
A. Hyaline cartilage
B. Elastic cartilage
C. Fibrous cartilage
D. None of the above
The correct answer is C. Fibrous cartilage.
Fibrous cartilage is the strongest type of cartilage, found in places requiring high tensile strength, such as the intervertebral discs.
Fibrous cartilage is the strongest type of cartilage, found in places requiring high tensile strength, such as the intervertebral discs.
40. Nissl’s granules are found in the cyton of nerve cells. These have an affinity for basic dyes. The granules are made up of:
A. Protein
B. DNA
C. Amino acids
D. RNA
The correct answer is A. Protein.
Nissl’s granules are composed of rough endoplasmic reticulum and ribosomes, which are involved in protein synthesis in nerve cells.
Nissl’s granules are composed of rough endoplasmic reticulum and ribosomes, which are involved in protein synthesis in nerve cells.
41. The inability to absorb digested nutrients may be due to damage of which type of epithelium?
A. Ciliated columnar
B. Simple columnar
C. Simple squamous
D. Simple cuboidal
The correct answer is B. Simple columnar.
Simple columnar epithelium is involved in absorption, particularly in the lining of the intestines.
Simple columnar epithelium is involved in absorption, particularly in the lining of the intestines.
42. The presence of a basement membrane is typical of most:
A. Epithelial tissues
B. Connective tissues
C. Nervous tissues
D. Muscle tissues
The correct answer is A. Epithelial tissues.
The basement membrane supports epithelial cells and separates them from underlying connective tissue.
The basement membrane supports epithelial cells and separates them from underlying connective tissue.
43. The most appropriate definition of neuroglial cells is that they are:
A. Nonsensory supporting cells
B. Secretory cells
C. Sensory cells
D. Sensory and supporting cells
The correct answer is C. Sensory cells.
Neuroglial cells provide structural support, nourishment, and insulation for neurons in the nervous system.
Neuroglial cells provide structural support, nourishment, and insulation for neurons in the nervous system.
44. Covering around bone is called:
A. Perichondrion
B. Periosteum
C. Epiosteum
D. Endosteum
The correct answer is B. Periosteum.
The periosteum is a dense layer of vascular connective tissue covering the bones except at the joints.
The periosteum is a dense layer of vascular connective tissue covering the bones except at the joints.
45. The figure given below shows the head region of a cockroach. Identify A to F.
A- Compound eye, B-Ocellus, C-Maxilla, D-Mandible, E-Labrum, F-Labium
A- Compound eye, B-Ocellus, C-Maxilla, D-Mandible, E-Labrum, F-Labium
A. A- Compound eye, B-Ocellus, C-Maxilla, D-Mandible, E-Labrum, F-Labium
B. A- Ocellus, B-Compound eye, C-Mandible, D-Maxilla, E-Labrum, F-Labium
C. A- Ocellus, B-Compound eye, C-Mandible, D-Maxilla, E-Labium, F-Labrum
D. A- Ocellus, B-Compound eye, C-Maxilla, D-Mandible, E-Labrum, F-Labium
The correct answer is A. A- Compound eye, B-Ocellus, C-Maxilla, D-Mandible, E-Labrum, F-Labium.
These are the names of various sensory and feeding structures in the head region of a cockroach.
These are the names of various sensory and feeding structures in the head region of a cockroach.
.png)
0 Comments