School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
A cap-like structure on the head of a spermatozoon is called
A)
spermatid
B)
acrosome
C)
Leydig cells
D)
sanchette
Acrosome cap contains enzymes for fertilization.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Golden Rice is a genetically-enhanced source of
A)
protein
B)
cholesterol
C)
omega-3 fatty acid
D)
vitamin A
Golden Rice engineered with phytoene synthase/crtI to produce beta-carotene provitamin A.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
The number of officially recognised National Parks in Mizoram is
A)
7
B)
2
C)
5
D)
8
Mizoram has 2 National Parks: Murlen and Phawngpui (Blue Mountain).
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Mizoram falls within the biodiversity hotspot of
A)
Indo-Burma and Eastern Himalayas
B)
Indo-Burma only
C)
Eastern Himalayas only
D)
Western Ghats and Indo-Burma
Mizoram lies in Indo-Burma biodiversity hotspot (out of 4 hotspots in India).
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
One of the important gases that is responsible for greenhouse effect is
A)
CO
B)
O2
C)
N2
D)
CO2
CO2 is major greenhouse gas (along with CH4, N2O, water vapour).
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Spiders belong to the class
A)
Insecta
B)
Crustacea
C)
Chilopoda
D)
Arachnida
Spiders are Arachnida, 8 legs, no antennae.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
The term Binomial nomenclature was proposed by
A)
Robert Hooke
B)
Whittaker
C)
Carolus Linnaeus
D)
Schleiden and Schwann
Binomial nomenclature introduced by Carolus Linnaeus in Species Plantarum 1753.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
The first discovered and most famous reptile-bird transitional fossil is
A)
Oviraptor
B)
Ichthyosaurus
C)
Archaeopteryx
D)
Quetzalcoatlus
Archaeopteryx lithographica shows reptilian teeth, tail and feathers – classic reptile-bird link.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Epigeal germination is found in
A)
Castor seed
B)
Bean seed
C)
Cotton seed
D)
All the above
Castor, bean, cotton all show epigeal where cotyledons above soil; all above correct.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Down’s syndrome is due to an
A)
absence of chromosome 14
B)
absence of X chromosome
C)
extra Y chromosome
D)
extra chromosome 21
Down syndrome trisomy 21 extra chromosome 21.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
The name vaccine was introduced by
A)
Edward Jenner
B)
Louis Pasteur
C)
Robert Koch
D)
Maurice Hilleman
Louis Pasteur coined term 'vaccine' (from vacca=cow) honoring Jenner; Jenner coined vaccination.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Every living cell has
A)
Chloroplast
B)
Cell membrane
C)
Cell wall
D)
Food vacuole
All living cells have cell membrane (plasma membrane); wall, chloroplast not universal.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Deforestation means
A)
Cutting of forests
B)
Formation of forests
C)
Increase soil fertility
D)
None of these
Deforestation = clearing/cutting of forests.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
The fact that DNA is a genetic material in bacteriophage was first demonstrated by
A)
James Watson and Francis Crick
B)
Alfred Hershey and Martha Chase
C)
E. Tatum and Joshua Lederberg
D)
Oswald T. Avery and Colin MacLeod
Hershey and Chase 1952 phage T2 experiment proved DNA is genetic material, not protein.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Why is Calvin cycle called C3 pathway
A)
Because first product of its cycle is oxaloacetic acid
B)
Because first product of its cycle is pyruvate
C)
Because first product of this cycle is ribulose di phosphate
D)
Because first product of this cycle is glyceraldehyde
Calvin cycle first stable product is 3-phosphoglycerate (3C); listed option glyceraldehyde-3-P is closest 3-C product; correctly 3-PGA.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
The biopiracy case of the neem tree (Azadirachta indica) was between
A)
India and Pakistan
B)
India and U.S.
C)
India and U.K.
D)
India and China
US patent 5126? on neem by W.R. Grace 1994 challenged by India/CSIR – India vs US biopiracy case.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
The most important hormone during parturition (gestation) is
A)
estrogen
B)
oxytocin
C)
prolactin
D)
luteinizing hormone
Oxytocin stimulates uterine contraction during parturition.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Find the number of triangles in the given figure.
A)
18
B)
20
C)
24
D)
27
Figure not provided; provisional 24 triangles common for such star/hex figure. [Image missing]
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Photorespiration involves
A)
Hatch-slack cycle
B)
Calvin cycle
C)
Glycolate cycle
D)
Kreb cycle
Photorespiration is glycolate cycle in chloroplast-peroxisome-mitochondria.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
The first product of C4 pathway is
A)
Oxaloacetic acid
B)
RuBP
C)
PGA
D)
PGAL
C4 first stable product oxaloacetic acid (4C) formed from PEP by PEP carboxylase.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Nitrification is the process of conversion of
A)
Nitrite to nitrate
B)
Nitrate to nitrite
C)
Nitrate to ammonia
D)
Ammonia to nitrate
Nitrification overall: NH3->NO2->NO3 by Nitrosomonas/Nitrobacter; net ammonia to nitrate.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Minerals are absorbed by plants
A)
In colloidal form
B)
In ionic form
C)
In solid form
D)
In precipitated form
Minerals taken up as ions dissolved in soil solution.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Process in which green plants synthesise food is called
A)
Photorespiration
B)
Photophosphorylation
C)
Photosynthesis
D)
Phototropism
Photosynthesis is CO2+H2O -> food in chloroplasts.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
According to Mendel’s Law of Dominance, a cross between tall (DD) and dwarf (dd) peas will form (in the F1 generation)
A)
1 dwarf
B)
2 dwarfs
C)
3 dwarfs
D)
4 dwarfs
F1 DD x dd all Dd tall (0 dwarf); conventional F2 ratio 3 tall:1 dwarf, so 1 dwarf in 4. Option lists 1 dwarf as closest.
School Teacher • 2017 • Technical Paper-II (Botany & Zoology)
Pick up the one which is most nearly the same in meaning as the word printed in bold and can replaces it without altering the meaning of the sentence: In spite of their efforts, the team of scientists could not make much headway to solve the problem.
A)
progress
B)
thinking
C)
efforts
D)
start
Headway = advancement; synonym progress.
