(ii) Tonsil is a bean shaped organ which produces
lymphocytes.
(iii) Antigen binds to a macrophage to reach a helper T-cell
to initiate immune response.
(iv) IgM has a J chain and its each dimer contains secretory
component.
(a) (i) only (b) (i), (ii) and (iv) only
(c) (ii) and (iv) only (d) (iii) and (iv) only- According to Miller’s experiment which of the following
statements is/are incorrect?
(i) Miller circulated five gases viz. CH 4 , NH 3 , H 2 , H 2 O and
CO 2 in an air tight apparatus.
(ii) The electrical discharge from electrodes were passed at
800°C.
(iii) Miller found a large number of complex inorganic
compounds.
(iv) Atmosphere inside the apparatus was reducing.
(a) (i) and (iv) only (b) (i) and (iii) only
(c) (i), (iii), and (iv) only (d) (ii) and (iv) only - Match column I with column II and select the correct
option.
Column I Column II
A. Codeine (i) Cannabis sativa
B. Mescaline (ii) Papaver somniferum
C. Marijuana (iii) Erythroxylan coca
D. Cocaine (iv) Lophophora williamsii
(a) A-(ii), B-(i), C-(iv), D-(iii) (b) A-(iii), B-(iv), C-(i), D-(ii)
(c) A-(ii), B-(iv), C-(i), D-(iii) (d) A-(iv), B-(iii), C-(ii), D-(i) - DDT was thought to be an effective insecticide against
household pests. But within few years, DDT resistant
mosquitoes became established in the population. Which
of the following graph can explain the above given
phenomenon?
(a) (b)(c) (d)- Which of the following options gives the correct match of a
disease with its pathogen and vaccine?
Disease Pathogen Vaccine
(a) Parotiditis Rubeola virus IPV
(b) Whooping cough Bordetella pertussis DPT
(c) Lock Jaw Clostridium tetani TABC
(d) Yellow fever Flavi virus MMR
26. Read the given statements and select the correct option.
Statement A : Artificial selection is based on the desire of
human.
Statement B : The improvement of domesticated plants
and animals is possible through artificial selection.
(a) Both statements A and B are correct and statement B
is the correct explanation of statement A.
(b) Both statements A and B are correct but statement B is
not the correct explanation of statement A.
(c) Statement A is incorrect but statement B is correct.
(d) Both statements A and B are incorrect.
27. Select the correct sequence of evolution of modern horse.
(a) Eohippus → Equus → Pliohippus → Mesohippus →
Merychippus
(b) Eohippus → Pliohippus → Mesohippus → Merychippus
→ Equus
(c) Eohippus → Mesohippus → Pliohippus → Merychippus
→ Equus
(d) Eohippus → Mesohippus → Merychippus →
Pliohippus → Equus
28. Identify the correct labellings of the given diagram.
(a) A-Constant region of light chain; B-Variable region of
heavy chain; C-Disulphide bond; D-Constant region of
heavy chain.
(b) A-Variable region of heavy chain; B-Constant region
of light chain; C-Hydrogen bond; D-Variable region of
light chain
(c) A-Variable region of light chain; B-Constant region of
heavy chain; C-Hydrogen bond; D-Variable region of
heavy chain
(d) A-Variable region of light chain; B-Constant region of
heavy chain; C-Disulphide bond; D-Variable region of
heavy chain- Saccharomyces cerevisiae Pg. 50
- Cyclosporin A Pg. 52
- Viceroy butterfly Pg. 67
- Entamoeba coli Pg. 71
ANSWERS WHO AM I ...