- Which of the following bacteria is not associated with denitrification?
(a) Nitrocystis (b) Pseudomonas
(c) Thiobacillus (d) Micrococcus
- Read the given statements and select the correct option.
Statement A : Veins have valves which prevent backward flow of
blood.
Statement B : The flow of blood in veins is not very fast because
the blood flows under low pressure.
(a) Both the statements are true but statement B is the correct
explanation of A.
(b) Both the statements are true but statement B is not the
correct explanation of A.
(c) Statement A is true but statement B is false.
(d) Both the statements A and B are false.
- The following graph depicts
B
A
Time
Number of organisms
changes in two populations (A
and B) of herbivores in a
grassland. A possible reason for
these changes is that
(a) Population ‘A’ produced more
offspring than population ‘B’.
(b) Population ‘A’ consumed
the members of population
‘B’.
(c) Population ‘B’ competed more successfully for food than
population ‘A’.
(d) Both plant populations shows allelopathy relationship.
- Read the following statements and select the correct ones.
(i) In simple cuboidal epithelium nuclei are rounded and lie in
the centre of the cells.
(ii) Non-keratinised epithelium is impermeable to water.
(iii) Yellow elastic fibrocartilage makes cartilage flexible.
(iv) Areolar tissue forms a shock absorbing cushion around the
eye balls and kidneys.
(a) (i) and (iii) (b) (i) and (ii)
(c) (iii) and (iv) (d) (ii) and (iv)
- Cladonia rangiferina is
(a) regarded as ‘bread of heaven’ by Jews
(b) the staple food of reindeer
(c) used to prepare perfumes
(d) the source of litmus.
- Select the correct option regarding the phytohormone to which
the given molecular structure belongs.
(a) This hormone promotes femaleness in most flowers.
(b) This hormone promotes apical dominance.
(c) This hormone usually decreases the size of stem, leaves,
flowers and fruits.
(d) This hormones breaks seed dormancy by synthesis of certain
enzymes.
- If we take out a small drop of each of the following separately on
glass slides which will not coagulate?
(a) Blood from hepatic portal vein
(b) Blood from pulmonary vein
(c) Blood plasma (d) Blood serum
- Examine the figure of gastric glands given below and identify the
labelled parts A to D.
Opening of gastric gland
A
B
C
D
Gastric
pit
A B C D
(a) Oxyntic cell Chief cells Mucous cells Argentaffin cell
(b) Argentaffin cell Oxyntic cells Mucous cells Chief cell
(c) G cell Chief cells Mucous cells Argentaffin cell
(d) Oxyntic cell G cells Mucous cells Chief cell
- Which of the following statements is correct?
(a) Vasa recta is well developed in cortical nephrons.
(b) PCT and DCT are situated in the medulla of the kidney.
(c) The glomerulus encloses the Bowman’s capsule.
(d) The ascending limb of the Henle’s loop extends as the DCT.
- Match column I with column II and select the correct option from
the codes given below.
Column I Column II
(Skeletal Part) (Number of bones)
A. Cranium (i) 29
B. Skull (ii) 8
C. Face (iii) 14
D. Hindlimb (iv) 24
E. Ribs (v) 30
(a) A-(i), B-(ii), C-(iii), D-(v), E-(iv)
(b) A-(ii), B-(i), C-(iii), D-(v), E-(iv)
(c) A-(i), B-(ii), C-(iii), D-(iv),E-(v)
(d) A-(v), B-(iv),C-(iii), D-(ii), E-(i)
- The 3rd, 6th and 11th cranial nerves are respectively
(a) oculomotor, abducens and spinal accessory
(b) oculomotor, trigeminal and spinal accessory
(c) optic, facial and spinal accessory
(d) trochlear, abducens and vagus.
- The given table enlists various hormones and their chemical
nature. Select the option which completes the table.
Hormone Chemical composition
(i) Peptide
Testosterone (ii)
Thyroxine (iii)
(iv) Amino-acid derivative
