Structural Organization In Animals MCQ Solved Paper for GRE

1. Nervous tissue cells that play several supporting roles but do not transmit impulses are called
A. glial cells
B. dendrites
C. nerve cells
D. neurons
Answer : A

2. Which of the following statement is incorrect regarding cuboidal epithelium ?
A. It is an epithelial tissue.
B. It is composed of a single layer of cube-like cells.
C. They are found in the walls of blood vessels and air sacs of lungs.
D. Secretion and absorption are the main functions of these tissue.
Answer : C

3. Lack of blood supply and presence of the noncellular basement membrane are the characteristics of the
A. muscular tissue
B. fluid connective tissue
C. epithelial tissue
D. nervous tissue
Answer : C

4. The secretions of endocrine glands are released directly
A. into the skin surface
B. into the blood stream
C. into a gland duct
D. into the brain tissue
Answer : B

5. Which of the following statement(s) is/are correct about nervous system of cockroach ?

1. It consists of a series of fused segmentally arranged ganglia joined by paired longitudinal connectives on the ventral side.
2. There are six ganglia lie in the thorax, and three in the abdomen.
3. The sense organs are antennae, eyes, maxillary pulps, labial pulps and anal cerci etc.
4. Each eye consists of about 5000 hexagonal ommatidia.

A. Both (i) and (iii)
B. Only (ii)
C. Both (i) and (iv)
D. All of these
Answer : C

6. Read the following statements and answer the question.

1. They have a hard and non-pliable ground substance rich in calcium salts and collagen fibres.
2. They support and protect softer tissues and organs.
3. Osteocytes are present in the spaces called lacunae.
4. They also interact with skeletal muscles attached to them to bring about movements.

Which of the following type of tissue is being described by above statements ?
A. Cartilage
B. Bone
C. Blood
D. Neurons
Answer : B

7. Cartilage tissues are likely to be slow in healing following an injury because
A. cartilage cells cannot reproduce.
B. they lack direct blood supplies.
C. the intercellular material is missing.
D. cartilage cells are surrounded by fluids.
Answer : B

8. A student was given a sample of two tissues. He observes the tissues under the microscope and draws their figures (1 and 2) as shown below.

Identify the tissues (1 and 2).
A. 1: Columnar cells bearing cilia; 2: Unicellular glandular epithelium
B. 1: Cuboidal cells bearing cilia; 2: Multicellular glandular epithelium
C. 1: Compound cells bearing cilia; 2: Unicellular glandular epithelium
D. 1: Columnar cells bearing cilia; 2: Multicellular glandular epithelium
Answer : D

9. Consider the following statements regarding cockroach and mark the correct option.

1. Head is formed by the fusion of 6-segments.
2. Mouth parts are biting and chewing type.
3. Crop is the part of mid gut.

A. Only (ii) is correct
B. (ii) and (iii) are correct
C. (i) and (ii) are correct
D. Only (iii) is correct
Answer : C

10. Three essential components of most neurons are
A. simple epithelium, extracellular matrix and nerves.
B. axon, dendrites and cell body.
C. nerve cells, synapse and neuroglia.
D. mylein sheeth, node of Ranvier and Schwann cells.
Answer : B

11. The given figure shows the nephridial system of earthworm and answer the question.

Select the option which shows the correct identification and the function of the structure marked as X.
A. Lateral heart. It is a blood pumping organ.
B. Calciferous glands. They neutralize the humic acid present in humus.
C. Nephridia. It regulates the volume and composition of the body fluids.
D. Blood glands. They produce blood cells and haemoglobin which is dissolved in blood plasma.
Answer : D

12. Which of the following statement is correct regarding Female reproductive system of earthworm ?
A. It consists of two large ovaries, lying laterally in the 6th 7th abdominal segments.
B. Each ovary is formed of a group of five ovarian tubules or ovarioles, containing a chain of developing ova.
C. A pair of spermatheca is present in the 5th segment which opens into the genital chamber.
D. None of the above
Answer : D

13. Tendons and ligaments are the examples of
A. areolar connective tissue
B. adipose tissue
C. dense regular connective tissue
D. loose connective tissue
Answer : C

14. Which of the following statement(s) regarding cell junctions is/are correct ?
A. Tight junctions help to stop substances from leaking across a tissue.
B. Adhering junctions perform cementing to keep neighbouring cells together.
C. Gap junctions facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells, for rapid transfer of ions, small molecules and sometimes big molecules.
D. All of the above
Answer : D

15. In the given diagram of areolar connective tissue, the different cells and parts have been marked by alphabets (A, B, C & D). Choose the answer in which these alphabets correctly match with the parts and cells they indicate.

A. A-Adipocyte, B-Collagen fibres, C-Microfilament, D-Mast cells
B. A-Macrophage, B-Collagen fibres, C-Microfilament, D-Mast cells
C. A-Macrophage, B-Collagen fibres, C-Microtubule, D-RBC
D. A-Macrophage, B-Fibroblast, C-Collagen fibres, D-Mast cells
Answer : D

16. Muscle tissue cells are contractile, which means they
A. are responsible for the production and secretion of enzymes.
B. are specialized in contraction and relaxation.
C. help in the movement of involuntary organs only.
D. all of the above
Answer : B

17. The chondrocytes of connective tissue are
A. fibre secreting cells
B. bone forming cells
C. cartilage cells
D. bone eating cells
Answer : C

18. The given figure shows open circulatory system of cockroach with structure marked as A, B and C. Which structure is a 13 pair of wing shaped involuntary muscles and mantain blood circulation?

A. A
B. B
C. C
D. Both A nad B
Answer : C

19. The intercellular material of the given figure is solid and resists compression. Identify the figure and the label marked as A & B.

A. Fig - Cartilage, A - Collagen, B - Collagen
B. Fig - Cartilage, A - Microtubule, B - Collagen fibres
C. Fig - Bone, A - Chondrocyte, B - Chondroclast
D. Fig - Bone, A - Chondroclast, B - Osteoblast
Answer : A

20. Which of the following statements is not correct regarding neural tissue ?
A. It exerts the greatest control over the bodys responsiveness to changing conditions.
B. Chondrocytes, the unit of neural system are excitable cells.
C. Neuroglial cells protect and support neurons.
D. When a neuron is suitably stimulated, an electrical disturbance is generated.
Answer : B

21. Which of the following type of muscle tissue is being described on the basis of given statements ?

1. These muscle fibres taper at both ends and do not show striations.
2. The wall of internal organs such as the blood vessels, stomach and intestine contain this type of muscle tissue.
3. They are involuntary as their function cannot be directly controlled.

A. Skeletal muscle
B. Smooth muscle
C. Cardiac muscle
D. All of these
Answer : B

22. The blood of cockroach contains no respiratory pigment. It means that
A. cockroach does not respire.
B. respiration is anaerobic.
C. oxygen goes directly into tissues by diffusion.
D. oxygen goes directly into tissues by intracellular capillary system.
Answer : D

23. Match the description given in column I with their examples given in column II and choose the correct option.

Column I	Column II
(Description)	(Example)
1. Aquatic respiratory	A. Skin organ
2. Organ which acts	B. Ureter urogenital duct and opens into the cloaca
3. A small median chamber	C. Cloaca that is used to pass faecal matter, urine and sperms to the exterior
4. A triangular structure	D. Sinus venosus which joins the right atrium and receives blood through vena cava

A. 1 - A, 2 - B, 3 - C, 4 - D
B. 1 - C, 2 - A, 3 - D, 4 - B
C. 1 - B, 2 - A, 3 - C, 4 - D
D. 1 - C, 2 - B, 3 - D, 4 - A
Answer : A

24. The fibres of which of the following muscles are fusiform and do not show striations
A. Skeletal muscles
B. Cardiac muscles
C. Both (a) and (b)
D. Smooth muscles
Answer : D

25. 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
Answer : D

26. Refer the given figure of female reproductive system of cockroach and identify the correct labels (marked as 1, 2, 3 and 4) which are collectively called genital pouch.

A. 1 & 2
B. 1 & 3
C. 2 & 4
D. 3 & 4
Answer : D

27. The mouth parts of cockroach are
A. cutting and biting type.
B. piercing and sucking type.
C. sucking and rasping type.
D. sucking and siphoning type.
Answer : A

28. Which of the follwing statement(s) is/are correct ?

1. Cockroaches are brown or black bodied animals that are included in class insecta of phylum arthropoda.
2. Males bear a pair of short, thread like anal styles which are absent in females.
3. Heart of cockroach consists of elongated muscular tube lying along mid dorsal line of thorax and abdomen.
4. The nymph grows by moulting about 13 times to reach the adult form.

A. Only (i)
B. Both (ii) and (iii)
C. Both (i) and (ii)
D. All of the above
Answer : B

29. Which of the following statement(s) is/are correct about muscle tissue ?
A. Each muscle is made of many long, cylindrical fibres arranged in parallel arrays.
B. Muscle fibres contract (shorten) in response to stimulation, then relax (lengthen) and return to their uncontracted state in a coordinated fashion.
C. Muscles play an active role in all movements of the body.
D. All of the above
Answer : D

30. Choose the correct sequence of alimentary canal of Cockroach
A. Gizzard -> Crop ->?Malphigian tubules ->?Hepatic caeca ->?Rectum.
B. Gizzard -> Hepatic caeca -> Crop -> Rectum -> Malphigiantubules.
C. Crop -> Gizzard ->?Hepatic caeca ->?Malphigian tubules ->?Rectum.
D. Crop -> Hepatic caeca ->?Gizzard -> Rectum -> Malphigian tubules.
Answer : C

31. Identify the figure with its correct function Fig :. Adipose connective tissue

A. Areolar connective tissue Serves as a support framework for epithelium.
B. Adipose tissue Store fats and act as heat insulators.
C. Dense regular tissue Provide flexibility.
D. Dense irregular tissue Provide strength and elasticity.
Answer : B

32. When cardiac muscle cells are damaged by a heart attack, they are usually replaced by
A. connective tissue cells
B. new smooth muscle cells
C. new cardiac muscle cells
D. epithelial cells
Answer : A

33. Which of the following animal's sensory system does not has eyes but does possess light and touch sensitive organs (receptor cells) to distinguish the light intensities and to feel the vibrations in the ground?
A. Frog
B. Snake
C. Earthworm
D. Cockroach
Answer : C

34. Which of the following statements regarding frog is not correct?
A. Fertilization is external and takes place in water.
B. External ear and tympanum can be seen externally.
C. In females the ureters and oviduct open separately in the cloaca.
D. Copulatory pad on the first digit of the fore limbs and vocal sac are present in male frog.
Answer : B

35. Which of the following statement (s) is/are correct ?

1. Loose connective tissue contains fibroblasts, macrophages and mast cells.
2. Adipose tissue is a type of dense connective tissue located mainly beneath the skin.
3. Tendons and ligaments are examples of dense irregular connective tissue.
4. Cartilage, bones and blood are various types of specialized connective tissue.

A. Only (i)
B. Both (ii) and (iv)
C. Both (i) and (iii)
D. (i), (iii) and (iv)
Answer : D

36. Which of the following statement is/are correct regarding digestive system of cockroach ?

1. Mouth opens into a short tubular pharynx, leading to a narrow tubular passage called oesophagus.
2. Gizzard helps in grinding the food particles.
3. A ring of 6-8 blind tubules called hepatic or gastric caecae is present at the junction of foregut and midgut, which secrete digestive juice.
4. At the junction of midgut and hindgut is present another ring of 100-150 yellow coloured thin filamentous malphigian tubules which help in removal of excretory products from haemolymph.

A. Only (i)
B. Both (ii) and (iii)
C. Both (i) and (iv)
D. All of these
Answer : D

37. Figure given below shows reproductive system of female cockroach. The correct labellings indicated by alphabets (A, B & C) are respectively

A. A-Spermatheca, B-Collaterial glands, C-Gonapophyses
B. A-Phallic gland, B-Collaterial glands, C-Gonapophyses
C. A-Spermatheca, B-Seminal vesicle, C-Gonapophyses
D. A-Spermatheca, B-Collateral glands, C-Tegmina
Answer : A

38. The following figure shows the extarnal features of cockroach with few structures labelled as A, B, C, D, & E. Identify A to E .

A. A- Mesothorax, B-Pronotum, C-Metathorax, D-Tegmina, E-Anal style
B. A- Pronotum, B-Metathorax, C-Mesothorax, D-Tegmina, E-Sterna
C. A- Pronotum, B-Mesothorax, C-Metathorax, D-Tegmina, E-Anal cerci
D. A- Pronotum, B-Mesothorax, C-Metathorax, D-Tegmina, E-Anal style
Answer : C

39. Which of the following statement(s) is/are correct regarding excretory system of cockroach ?

1. Excretion is performed by malphigian tubules.
2. They absorb nitrogenous waste products and convert them into uric acid which is excreted out through hindgut. Hence, this insect called ammonetelic.
3. In addition, fat body, nephrocytes and uricose glands also help in excretion.

A. Only (i)
B. Both (ii) and (iii)
C. Both (i) and (iii)
D. All of these
Answer : C

40. Read the following statements.

1. It is a contractile tissue present only in the heart.
2. Cell junctions fuse the plasma membranes of these cells and make them stick together.
3. Communication juntions at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbours are also stimulated to contract.

Which of the following type of tissue is being described by the above statements ?
A. Skeletal muscle
B. Cardiac muscle
C. Smooth muscle
D. Cartilage
Answer : C

41. The figure given below shows the head region of cockroach. Identify A to F.

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
Answer : B

42. The frog never drinks water but absorbs it through one of its respiratory organ. Identify the organ.
A. Skin
B. Lung
C. Buccal cavity
D. None of the above.
Answer : A

43. Read the following statements and answer the question.

1. It is made of a single thin layer of flattened cells with irregular boundaries.
2. They are found in the walls of blood vessels and air sacs of lungs.
3. They are involved in functions like forming a diffusion boundary.

Which of the following characteristics of tissue is being described by the above statements ?
A. Squamous epithelium
B. Columnr epithelium
C. Ciliated epithelium
D. Compound epithelium
Answer : A

44. Statement 1 : Intercalated discs are important regions of cardiac muscle cells.
Statement 2 : Intercalated discs function as boosters for muscle contraction waves.
A. Statement-1 and statement-2 are true and statement-2 is a correct explanation for statement-1.
B. Statement-1 and statement-2 are true and ttatement-2 is not a correct explanation for statement-1
C. Statement-1 is true, and statement-2 is False
D. Both the statements are false.
Answer : A

45. Match the types of connective tissue given in column-I with their examples given column-II and choose the correct option.

Column-I	Column-II
(Types of connective)	(Examples)
A. Loose connective	I. Tendons and ligaments tissue
B. Dense regular	II. Skin tissue
C. Dense irregular	III. Cartilage, bones, blood tissue
D. Specialized	IV. Fibroblasts, macrophages connective tissue and mast cells

A. A I; B IV; C II; D III
B. A I; B IV; C III; D II
C. A IV; B I; C II; D III
D. A IV; B II; C I; D III
Answer : C

46. Match the epithetial tissue given in column-I with its location given in column-II and choose the correct option.

Column I	Column II
(Epithelial tissue)	(Location)
A. Cuboidal	I. Epidermis of skin
B. Ciliated	II. Inner lining of blood vessels
C. Columnar	III. Inner surface of gall bladder
D. Squamous	IV. Inner lining of fallopian tube
E. Keratinized	V. Lining of pancreatic duct squamous

A. A V; B IV; C II; D III; E I
B. A III; B IV; C V; D II; E I
C. A V; B IV; C III; D II; E I
D. A III; B IV; C V; D I; E II
Answer : C

47. Which of the following statement(s) is/are correct regarding compound epithelium ?
A. It is made of more than one layer of cells and thus has a limited role in secretion and absorption.
B. Their main function is to provide protection against chemical and mechanical stresses.
C. They cover the dry surface of the skin, moist surface of buccal cavity, pharynx, inner lining of ducts of salivary glands and pancreatic ducts.
D. All of the above
Answer : D

48. Which of the following statement(s) is/are correct regarding respiratory system of cockroach ?

1. It consists of a network of trachea, that open through 12 pairs of small holes called spiracles present on the lateral side of the body.
2. Thin branching tubes carry oxygen from the air to all the parts.
3. The opening of the spiracles is regulated by sphincters.
4. Exchange of gases take place at the tracheoles by diffusion.

A. Only (i)
B. (i), (ii) and (iii)
C. (ii), (iii) and (iv)
D. All of these
Answer : C

49. Find the incorrectly matched pair.
A. Unicellular glandular cells - Goblet cell
B. Saliva - Exocrine secretion
C. Fusiform fibres - Smooth muscle
D. Cartilage - Areolar tissue
Answer : D

50. Smooth muscles are______.
A. voluntary, branched, uninucleate
B. voluntary, multinucleate, cylindrical
C. involuntary, cylindrical, multinucleate
D. involuntary, spindle shaped, uninucleated, tapering
Answer : D