Biology today

MTMTBIOLOGY TODAYBIOLOGY TODAY || MARCH ‘16MARCH ‘16 6767

55. Match the hormones secreted by various endocrine
    structures and choose the correct option.
    I. Hypothalamus A. Melanocyte stimulating
    hormone
    II. Pars intermedia B. Aldosterone
    III. Pineal gland C. Gonadotrophin releasing
    hormone
    IV. Adrenal medulla D. Melatonin
    V. Adrenal cortex E. Catecholamines
    (a) I - E, II - A, III - D, IV - B, V - C
    (b) I - E, II - D, III - A, IV - B, V - C
    (c) I - B, II - D, III - A, IV - C, V - E
    (d) I - C, II - A, III - D, IV - E, V - B


56. A fall in glomerular filtration rate (GFR) activates
    (a) juxtaglomerular cells to release renin
    (b) adrenal cortex to release aldosterone
    (c) adrenal medulla to release adrenaline
    (d) posterior pituitary to release vasopressin.


57. Choose the wrong statement.
    (a) Solubility of CO 2 in blood is 20-25 times higher than
    that of O 2.
    (b) The total volume of air accommodated in the lungs
    at the end of a forced inspiration is called the ‘vital
    capacity’.
    (c) O 2 can bind with haemoglobin in a reversible manner
    to form oxyhaemoglobin.
    (d) Every 100 mL of deoxygenerated blood delivers
    approximately 4 mL of CO 2 to the alveoli.


58. Choose the wrong statement.
    (a) Cells swell in hypertonic solutions and shrink in
    hypotonic solutions.
    (b) Water potential is the kinetic energy of water which
    helps in the movement of water.
    (c) The absorption of water by seeds and dry wood takes
    place by a special type of diffusion called imbibition.
    (d) Solute potential or ys is always negative.


59. Find out the mismatched pair.
    (a) C 4 plants → Kranz anatomy
    (b) Primary CO 2 acceptor → RuBP
    of C 3 plants
    (c) Calvin pathway of → Bundle sheath
    C 4 plants occur in
    (d) C 3 plants → Maize


60. Which one of the following organelle in

the figure correctly matches with
its function?
(a) Golgi apparatus, formation of
glycolipids
(b) Rough endoplasmic reticulum,
protein synthesis

(c) Rough endoplasmic reticulum, formation of glycoproteins

(d) Golgi apparatus, protein synthesis

61. Identify the tissue shown in the diagram
    and match with its characteristics and
    its location.
    (a) Smooth muscles, show branching,
    found in the wall of the heart.
    (b) Cardiac muscles, unbranched muscles,
    found in the walls of the heart.
    (c) Striated muscles, tapering at both-ends, attached with
    the bones of the ribs.
    (d) Skeletal muscles show striations and are closely
    attached with the bones of the limbs.


62. Select the answer which correctly matches the endocrine
    gland with the hormone it secretes and its function/
    deficiency symptom.
    Endocrine
    gland

Hormone Function/Deficiency

symptoms

(a) Thyroid

gland

Thyroxine Lack of iodine in diet

results in goitre

(b) Corpus

luteum

Testosterone Stimulates

spermatogenesis

(c) Anterior

pitutary

Oxytocin Stimulates uterus

contraction during

child birth

(d) Posterior

pitutary

Growth

Hormone(GH)

Oversecretion

stimulates abnormal

growth

63. Which of these is/are not a property of facilitated transport?
    A. Requires special membrane proteins
    B. Highly selective
    C. Uphill transport
    D. Requires ATP energy
    (a) A and B only (b) C and D only
    (c) A and C only (d) B and C only


64. The site on antigen that are recognised by antibodies and
    receptors present on T- and B-cells are
    (a) antigenic determinants
    (b) epitopes
    (c) paratopes
    (d) both (a) and (b).


65. Protein encoded by gene cryIAb controls the infestation of
    which of the following insects
    (a) cotton boll worm
    (b) anopheles mosquito
    (c) corn borer
    (d) aedes mosquito.


66. RNA interference which is employed in making tobacco
    plant resistant to Meloidogyne incognita is essentially
    involved in
    (a) preventing the process of replication of DNA