1. According to Steward’s starch hydrolysis theory, which one
   of the following is the principle reason for the opening of
   stomata during daytime?
   (a) Influx of K+ ions into guard cells under the influence
   of ABA hormone.
   (b) Conversion of sugar into starch in guard cells.
   (c) Efflux of K+ ions from guard cells under the influence
   of ABA hormone.
   (d) Photosynthetic utilisation of CO 2 in guard cells.


2. An insect bite may result in inflammation of that spot. This
   is triggered by chemicals such as
   (a) histamine and dopamine (b) histamine and kinins
   (c) interferon and opsonin (d) interferon and histone.


3. When a stimulus several times greater than the threshold
   stimulus is provided to a muscle fibre, it will
   (a) contract with a smaller force
   (b) contract with a larger force
   (c) contract with the same force
   (d) fail to contract.


4. Match column I with column II and choose the correct
   answer.
   Column I Column II
   A. Cleistogamy m. Insect pollination
   B. Geitonogamy n. Bud pollination
   C. Entomophily o. Pollination between flowers
   in the same plant
   D. Xenogamy p. Wind pollination
   q. Cross pollination
   (a) A-o; B-m; C-q; D-n (b) A-m; B-q; C-n; D-o
   (c) A-n; B-o; C-m; D-q (d) A-q; B-p; C-o; D-n


5. Evolutionary convergence is characterised by
   (a) development of dissimilar characteristics in closely
   related groups
   (b) development of a common set of characteristics in
   groups of different ancestry
   (c) development of characteristics by random mating
   (d) replacement of common characteristics in different groups.
   6. Apart from corticotropin releasing hormone (CRH), which
   other hormone also stimulates the release of adrenocorti-
   cotropic hormone (ACTH)?
   (a) Epinephrine (b) Aldosterone
   (c) Insulin (d) Vasopressin
   7. The state, during which the respiratory centre is inhibited,
   is termed as
   (a) anoxia (b) asphyxia
   (c) suffocation (d) choking.
   8. Which of the following option is incorrect with respect to
   electron transport system (ETS)?
   (a) It involves cytochrome–b, cytochrome–c, cytochrome–a,
   cytochrome–a 3.
   (b) Each NADH 2 gives 3 ATP (through ETS) and each
   FADH 2 gives 2 ATP (through ETS).
   (c) There is a progressive increase in energy level of
   electron through ETS.
   (d) ETS reaction is a redox reaction.
   9. Select the mismatched pair.
   (a) PCT - Absorption of hormones and
   vitamins
   (b) DCT - Absorption of glucose
   (c) Henle’s loop - Concentration of urine
   (d) Bowman’s capsule - Glomerular filtration
   10. Study the given diagram and identify the cells labelled as
   A, B, C and D, and choose the correct option.

(a) A-Eosinophil, B-Erythrocyte, C-Neutrophil, D-Basophil

(b) A-Eosinophil, B-Lymphocyte, C-Neutrophil, D-Basophil

(c) A-Erythrocyte, B-Basophil, C-Neutrophil, D-Lymphocyte

(d) A-Eosinophil, B-Monocyte, C-Neutrophil, D-Lymphocyte

AIIMSAIIMS

PRACTICE PAPER

Exam on

28 th May