NEET Structural oranization animals ,Biology mcqs,online Practice questions

Structural Organization in Animals Mock Test-7

Question No:1

Assertion: Muscle fibres are said to be contractile in nature.
Reason: Cells of muscle tissues can shorten forcefully and again return to the relaxed state.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:2

Assertion: Gap junctions facilitate the cells to communicate with each other.
Reason: Gap junction connect the cytoplasm of adjoining cells .

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:3

Assertion: Skeletal muscle fibres appear to be striated.
Reason: This is due to regular alternate arrangement of thick and thin filaments is smooth muscle fibre.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:4

Assertion: Non-striated muscles are said to be voluntary in nature.
Reason: Non-striated muscles can be moved according to will.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:5

Assertion: Intercalated discs are important regions of cardiac muscle cells.
Reason: Intercalated discs function as communication junction for muscle contraction waves.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:6

Assertion: Neurons are said to possess the property of excitability.
Reason: Neurons can get excited by a given stimulus.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:7

Assertion: Extracellular materials help in separation of cells.
Reason: Cell junctions are formed by extra cellular materials.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:8

Assertion: Epithelial tissues protect the under lying and over lying tissues.
Reason: Materials are exchanged at the surfaces across the epithelial tissues.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:9

Assertion: The cells of columnar epithelium in absorptive surfaces often bears microvilli on their free ends,
Reason: Microvilli on their free ends.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:10

Assertion: Ciliated epithelium helps in movement of particles.
Reason: Cilia help in movement.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:11

Assertion: Extracellular materials are important for cells.
Reason: Intercellular materials surround the cells & bind them together.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the: assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:12

Assertion: Urinary bladder can considerably expand to accommodate urine.
Reason: It is lined by stretchable transitional epithelium.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the: assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:13

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



Question No:14

If for some reason our goblet cells are non-functional, this will adversely affect

[A] Production of somatostatin
[B] Secretion of sebum from the sebaceous glands
[C] Maturation of sperms
[D] Smooth movement of food down the intestine



Question No:15

The cells lining the blood vessels belong to the category of

[A] Smooth muscle tissue
[B] Squamous epithelium
[C] Columnar epithelium
[D] Connective tissue



Question No:16

Consider the following four statements (A-D) related to the common frog Rana tigrina, the select the correct option stating which ones are true (T) and which ones are false (F) statement?
(A) On dry land it would die due to lack of O2 if its mouth is forcibly kept closed for a few days.
(B) It has four-chambered heart.
(C) On dry land it turns uricotelic from Ureotelic.
(D) Its life-history is carried out in pond water.
A B C D

[A] T F F T
[B] T T F F
[C] F F T T
[D] F T T F



Question No:17

Which one of the following structures in Pheretima is correctly matched with its function?

[A] Clitellum – secretes cocoon
[B] Gizzard – absorbs digested food
[C] Setae – defence against predators
[D] Typhlosole – storage of extra nutrients