6464 MTMTBIOLOGY TODAYBIOLOGY TODAY || MARCH ‘16MARCH ‘16
(b) B - Scala vestibuli-filled with endolymph that ends at
the oval window.
(c) C - Scala tympani - terminates at the round window
which opens to the middle ear.
(d) D - Basilar membrane - nerve impulses are generated
against it.
- Identify the hormones ‘A’, ‘B’ and ‘C’ that are labelled in
the given flow chart.
Hypothalamus
A
Pituitary
B C
Ovary Testis
Ovum Androgens
(a) A-GnRH, B-PRL, C-ICSH
(b) A-GnRH, B-ICSH, C-ISH
(c) A-GnRH, B-FSH, C-LH
(d) A-GH, B-FSH, C-LH
- The figure shows blood circulation in humans with labels A
to D. Select the option which gives correct identification of
label and functions of the part.
D
A
B
C
(a) B - Capillary-Thin without muscle layer and wall two
cell layers thick
(b) C - Vein-Thin walled and blood flows in jerks/spurts
(c) D - Pulmonary vein-Takes oxygenated blood to heart,
PO 2 = 95 mmHg
(d) A - Artery-Thick walled and blood flows evenly
- Match the items in Column I with those in Column II, and
choose the correct answer.
Column I Column II
A. Control of weeds (i) Gibberellin
B. Induction of germination (ii) Cytokinin
C. Ripening of fruit (iii) 2, 4-D
D. Delaying of senescence (iv) Ethylene
(a) A - (ii), B - (iv),C - (iii), D - (i)
(b) A - (iii), B - (i), C - (iv), D - (ii)
(c) A - (i), B - (ii), C - (iv), D - (iii)
(d) A - (ii), B - (iii), C - (i), D - (iv)
- Select the plants pollinated by water.
A. Water hyacinth B. Zostera
C. Amorphophallus D. Vallisneria
E. Yucca
(a) A, D and E only
(b) B and E only
(c) B and D only
(d) B, C and D only
- Out of 38 molecules of ATP produced upon aerobic
respiration of glucose, the break up in ATP production in
glycolysis (P), pyruvate to acetyl-CoA formation (Q) and
Krebs’ cycle (R) is as follows :
(a) P = 2, Q = 6, R = 30
(b) P = 8, Q = 6, R = 24
(c) P = 8, Q = 10, R = 20
(d) P = 2, Q = 12, R = 24
- Identify the DNA segment which is not a palindromic
sequence.
(a) 5 ′ GGATCC 3′ (b) 5 ′ GAATTC 3′
3 ′ GGTACC 5′ 3 ′ CTTAAG 5′
(c) 5 ′ GCGGCCGC 3′ (d) 5 ′ CCCGGG 3′
3 ′ CGCCGGCG 5′ 3 ′ GGGCCC 5′
- The figure shows a section of human ovary. Select the
option which gives the correct identification of either A or
B with function/characteristic.
A
B
(a) B- Corpus luteum - Secretes progesterone
(b) A- Tertiary follicle - Forms Graafian follicle
(c) B- Corpus luteum - Secretes testosterone
(d) A- Primary oocyte - It is in the prophase-I of the
meiotic division
- Put the following parts of a reflex arc in the correct order
beginning with the sensory receptor.
A. Motor neuron B. Interneuron
C. Effector D. Sensory neuron
E. Sensory receptor.
(a) E, D, B, A ,C (b) E, D, A , B, C
(c) A, B, C, D, E (d) A, E, D, B, C
