Biology Today — May 2017

(WallPaper) #1

  1. Pseudostratified ciliated columnar epithelium is found in
    (a) trachea (b) olfactory mucosa
    (c) bronchi (d) both (a) and (c).

  2. Which of the following is a mismatched pair?
    (a) Squamous epithelium - Walls of blood vessels
    (b) Ciliated epithelium - Inner surface of bronchioles
    (c) Columnar epithelium - Lining of stomach
    (d) Cuboidal epithelium - Lining of intestine

  3. Adipose tissues help in
    (a) prevention of heat loss
    (b) production of blood corpuscles
    (c) absorption of shock by some vital organs
    (d) all of these.

  4. Which of the following is a specialised connective tissue?
    (a) Cartilage (b) Bone
    (c) Blood (d) All of these

  5. Long bones are covered with ____ at their ends.
    (a) muscles (b) adipose tissues
    (c) areolar tissues (d) spongy bones.

  6. The stratified columnar epithelium is found in
    (a) cornea of eye
    (b) lining of salivary and pancreatic ducts
    (c) lining of mammary gland ducts
    (d) lining of larynx and soft palate.

  7. Blood of cockroach has the respiratory pigment
    (a) haemoglobin (b) haemocyanin
    (c) haemoerythrin (d) none of these.


Match The Columns


  1. Match Column I with Column II.
    Column I Column II
    A. Tight junctions (i) Minute projections of
    membrane that connects
    adjacent cells
    B. Gap junctions (ii) Helps in anchoring
    neighbour cells
    C. Zonula adherens (iii) Prevent exchange of
    chemicals between
    adjacent cells
    D. Intercellular bridges (iv) Exchange chemicals
    between adjacent cells

  2. Match Column I with Column II. (There can be more than


one match for items in Column I).

Column I Column II
A. Striated muscle (i) Voluntary
B. Smooth muscle (ii) Uninucleate fibres
C. Cardiac muscle (iii) Pavement epithelium
D. Simple squamous (iv) Pharynx
epithelium
(v) Involuntary
(vi) Alveoli
(vii) Intercalated discs
(viii) Urinary bladder

Passage Based Question


  1. Complete the given passage with appropriate words or
    phrases.
    Muscles are made up of highly specialised thin and elongated
    cells called (i). Muscular tissues are derived from (ii) layer
    of embryonic germ cells. Muscular cells are also called (iii)
    or (iv). These develop from (v). Each muscle fibre consists
    of fine fibrils, present in cytoplasm known as (vi) and the
    membrane of each fibre is known as (vii). A muscle consists
    of many muscle fibres arranged in bundles called (viii) which
    is surrounded by a connective tissue sheath (ix). Each muscle
    fibre is surrounded by this connective tissue sheath (x). The
    connective tissue that covers the whole muscle is called (xi).


Assertion & Reason
In each of the following questions, a statement of Assertion (A)
is given and a corresponding statement of Reason (R) is given
just below it. Of the statements, mark the correct answer as:
(a) if both A and R are true and R is the correct explanation of A
(b) if both A and R are true but R is not the correct explanation of A
(c) if A is true but R is false
(d) if both A and R are false.


  1. Assertion : Endocrine glands do not have ducts.
    Reason : Endocrine glands secrete saliva and mucus.

  2. Assertion : Calcium is necessary for the contraction of
    muscles.
    Reason : In presence of calcium ions and ATP, actomyosin
    is formed.

  3. Assertion : Blood can prevent its own excessive loss.
    Reason : Thrombocytes release platelet factors such as
    thromboplastin.

  4. Assertion : Red bone marrow is present at the
    epiphyses.
    Reason : Red bone marrow is gradually replaced by
    yellow bone marrow.

  5. Assertion : Ciliated epithelium helps in the movement
    of secretions from glands, urine and semen.
    Reason : Cells of ciliated epithelium are unequal in size
    and only long cells have cilia at their surface.

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